./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b5699aa 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/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 27e1465127a7716c3a524ea62953f8f9857cdca3 ................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-6b5699a [2019-11-26 02:40:46,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:40:46,816 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:40:46,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:40:46,827 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:40:46,828 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:40:46,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:40:46,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:40:46,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:40:46,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:40:46,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:40:46,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:40:46,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:40:46,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:40:46,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:40:46,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:40:46,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:40:46,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:40:46,843 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:40:46,845 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:40:46,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:40:46,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:40:46,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:40:46,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:40:46,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:40:46,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:40:46,852 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:40:46,853 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:40:46,854 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:40:46,855 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:40:46,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:40:46,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:40:46,857 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:40:46,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:40:46,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:40:46,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:40:46,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:40:46,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:40:46,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:40:46,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:40:46,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:40:46,862 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2019-11-26 02:40:46,875 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:40:46,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:40:46,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:40:46,876 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:40:46,876 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:40:46,876 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:40:46,877 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:40:46,877 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:40:46,877 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:40:46,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-26 02:40:46,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-26 02:40:46,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:40:46,878 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:40:46,879 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:40:46,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:40:46,879 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:40:46,879 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:40:46,879 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-26 02:40:46,880 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-26 02:40:46,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:40:46,880 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-26 02:40:46,880 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-26 02:40:46,880 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-26 02:40:46,881 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:40:46,881 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-26 02:40:46,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:40:46,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-26 02:40:46,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:40:46,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:40:46,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:40:46,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:40:46,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:40:46,883 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2019-11-26 02:40:46,883 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-26 02:40:46,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:40:46,883 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/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 valid-memcleanup) ) 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 -> 27e1465127a7716c3a524ea62953f8f9857cdca3 [2019-11-26 02:40:47,018 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:40:47,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:40:47,035 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:40:47,036 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:40:47,036 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:40:47,037 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/../../sv-benchmarks/c/list-properties/list_flag-1.i [2019-11-26 02:40:47,106 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/data/484784773/07e5d7b9c3774b24b884e3dfb221a9e4/FLAG4ae96a297 [2019-11-26 02:40:47,553 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:40:47,554 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/sv-benchmarks/c/list-properties/list_flag-1.i [2019-11-26 02:40:47,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/data/484784773/07e5d7b9c3774b24b884e3dfb221a9e4/FLAG4ae96a297 [2019-11-26 02:40:47,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/data/484784773/07e5d7b9c3774b24b884e3dfb221a9e4 [2019-11-26 02:40:47,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:40:47,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:40:47,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:40:47,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:40:47,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:40:47,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:40:47" (1/1) ... [2019-11-26 02:40:47,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b5a24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:47, skipping insertion in model container [2019-11-26 02:40:47,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:40:47" (1/1) ... [2019-11-26 02:40:47,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:40:47,654 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:40:48,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:40:48,048 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:40:48,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:40:48,142 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:40:48,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48 WrapperNode [2019-11-26 02:40:48,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:40:48,144 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:40:48,144 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:40:48,144 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:40:48,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,169 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:40:48,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:40:48,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:40:48,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:40:48,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,215 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... [2019-11-26 02:40:48,224 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:40:48,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:40:48,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:40:48,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:40:48,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 [2019-11-26 02:40:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-26 02:40:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:40:48,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-26 02:40:48,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-26 02:40:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-26 02:40:48,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:40:48,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:40:48,786 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:40:48,787 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-26 02:40:48,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:48 BoogieIcfgContainer [2019-11-26 02:40:48,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:40:48,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:40:48,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:40:48,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:40:48,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:40:47" (1/3) ... [2019-11-26 02:40:48,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7052ec28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:40:48, skipping insertion in model container [2019-11-26 02:40:48,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:40:48" (2/3) ... [2019-11-26 02:40:48,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7052ec28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:40:48, skipping insertion in model container [2019-11-26 02:40:48,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:48" (3/3) ... [2019-11-26 02:40:48,795 INFO L109 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2019-11-26 02:40:48,806 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:40:48,811 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2019-11-26 02:40:48,820 INFO L249 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2019-11-26 02:40:48,837 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:40:48,837 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-26 02:40:48,837 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:40:48,837 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:40:48,838 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:40:48,838 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:40:48,838 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:40:48,838 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:40:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2019-11-26 02:40:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:40:48,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:40:48,856 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:40:48,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-11-26 02:40:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:40:48,860 INFO L82 PathProgramCache]: Analyzing trace with hash 889600200, now seen corresponding path program 1 times [2019-11-26 02:40:48,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:40:48,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [769102939] [2019-11-26 02:40:48,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 [2019-11-26 02:40:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:40:48,944 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-26 02:40:48,948 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:40:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:48,960 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:40:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:48,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769102939] [2019-11-26 02:40:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:40:48,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-26 02:40:48,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868293200] [2019-11-26 02:40:48,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-26 02:40:48,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:40:48,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-26 02:40:48,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:40:48,985 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2019-11-26 02:40:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:40:48,999 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2019-11-26 02:40:48,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-26 02:40:49,001 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-26 02:40:49,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:40:49,008 INFO L225 Difference]: With dead ends: 53 [2019-11-26 02:40:49,008 INFO L226 Difference]: Without dead ends: 48 [2019-11-26 02:40:49,010 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-26 02:40:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-26 02:40:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-26 02:40:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-26 02:40:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-11-26 02:40:49,035 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 6 [2019-11-26 02:40:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:40:49,036 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-11-26 02:40:49,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-26 02:40:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-11-26 02:40:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:40:49,036 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:40:49,037 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:40:49,238 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:49,238 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-11-26 02:40:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:40:49,239 INFO L82 PathProgramCache]: Analyzing trace with hash 889599239, now seen corresponding path program 1 times [2019-11-26 02:40:49,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:40:49,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2139279016] [2019-11-26 02:40:49,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 [2019-11-26 02:40:49,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:40:49,316 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-26 02:40:49,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:40:49,368 INFO L377 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 [2019-11-26 02:40:49,368 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:40:49,376 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:40:49,377 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:40:49,377 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-26 02:40:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:49,450 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:40:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:49,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2139279016] [2019-11-26 02:40:49,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:40:49,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-26 02:40:49,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988963158] [2019-11-26 02:40:49,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:40:49,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:40:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:40:49,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:40:49,475 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2019-11-26 02:40:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:40:49,704 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2019-11-26 02:40:49,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:40:49,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-26 02:40:49,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:40:49,707 INFO L225 Difference]: With dead ends: 55 [2019-11-26 02:40:49,707 INFO L226 Difference]: Without dead ends: 55 [2019-11-26 02:40:49,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:40:49,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-26 02:40:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2019-11-26 02:40:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-26 02:40:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-11-26 02:40:49,721 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 6 [2019-11-26 02:40:49,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:40:49,722 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-11-26 02:40:49,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:40:49,722 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-11-26 02:40:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:40:49,723 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:40:49,723 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:40:49,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:49,927 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-11-26 02:40:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:40:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash 889599240, now seen corresponding path program 1 times [2019-11-26 02:40:49,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:40:49,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2009211262] [2019-11-26 02:40:49,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 [2019-11-26 02:40:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:40:49,995 INFO L255 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-26 02:40:49,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:40:50,017 INFO L377 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 [2019-11-26 02:40:50,017 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:40:50,032 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:40:50,033 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:40:50,033 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-26 02:40:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:50,081 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:40:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:40:50,181 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2009211262] [2019-11-26 02:40:50,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:40:50,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-26 02:40:50,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512288622] [2019-11-26 02:40:50,183 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-26 02:40:50,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2019-11-26 02:40:50,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-26 02:40:50,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:40:50,184 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 6 states. [2019-11-26 02:40:50,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:40:50,560 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2019-11-26 02:40:50,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-26 02:40:50,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-26 02:40:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:40:50,563 INFO L225 Difference]: With dead ends: 65 [2019-11-26 02:40:50,563 INFO L226 Difference]: Without dead ends: 65 [2019-11-26 02:40:50,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-26 02:40:50,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-26 02:40:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2019-11-26 02:40:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-26 02:40:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2019-11-26 02:40:50,569 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 6 [2019-11-26 02:40:50,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:40:50,570 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2019-11-26 02:40:50,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-26 02:40:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2019-11-26 02:40:50,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-26 02:40:50,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:40:50,571 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:40:50,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:50,772 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2019-11-26 02:40:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:40:50,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1669336299, now seen corresponding path program 1 times [2019-11-26 02:40:50,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy WALRUS [2019-11-26 02:40:50,773 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [432197445] [2019-11-26 02:40:50,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/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 [2019-11-26 02:40:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:40:50,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:40:50,936 INFO L174 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2019-11-26 02:40:50,937 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:40:51,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-26 02:40:51,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:40:51 BoogieIcfgContainer [2019-11-26 02:40:51,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:40:51,163 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:40:51,163 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:40:51,163 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:40:51,164 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:40:48" (3/4) ... [2019-11-26 02:40:51,165 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:40:51,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_5fb50d46-b3a1-48b6-bf2a-ad022644bfae/bin/utaipan/witness.graphml [2019-11-26 02:40:51,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:40:51,206 INFO L168 Benchmark]: Toolchain (without parser) took 3617.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 939.3 MB in the beginning and 969.3 MB in the end (delta: -30.0 MB). Peak memory consumption was 112.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:51,206 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:51,207 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:51,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.08 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:51,208 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 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. [2019-11-26 02:40:51,209 INFO L168 Benchmark]: RCFGBuilder took 563.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:51,209 INFO L168 Benchmark]: TraceAbstraction took 2373.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 974.7 MB in the end (delta: 111.9 MB). Peak memory consumption was 111.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:40:51,210 INFO L168 Benchmark]: Witness Printer took 41.33 ms. Allocated memory is still 1.2 GB. Free memory is still 969.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:40:51,213 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 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 554.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -180.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 51.08 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 29.26 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 563.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2373.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 974.7 MB in the end (delta: 111.9 MB). Peak memory consumption was 111.9 MB. Max. memory is 11.5 GB. * Witness Printer took 41.33 ms. Allocated memory is still 1.2 GB. Free memory is still 969.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 520]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L521] int flag = __VERIFIER_nondet_int(); [L522] List p, a, t; [L523] a = (List) malloc(sizeof(struct node)) [L524] COND FALSE !(a == 0) [L525] p = a [L526] COND FALSE !(__VERIFIER_nondet_int()) [L537] p->h = 3 [L538] p = a [L539] COND TRUE \read(flag) [L540] EXPR p->h [L540] COND FALSE !(p->h == 2) [L545] EXPR p->h [L545] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 21 error locations. Result: UNSAFE, OverallTime: 2.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 99 SDtfs, 208 SDslu, 18 SDs, 0 SdLazy, 100 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 850 SizeOfPredicates, 8 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...