./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a71ed7b24cb625c47cfb1b6ba9f6cdbf2879f063 .......................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.0-7b2dab5 [2021-10-11 02:27:14,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:14,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:14,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:14,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:14,764 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:14,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:14,769 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:14,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:14,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:14,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:14,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:14,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:14,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:14,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:14,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:14,784 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:14,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:14,788 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:14,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:14,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:14,796 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:14,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:14,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:14,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:14,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:14,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:14,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:14,807 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:14,808 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:14,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:14,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:14,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:14,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:14,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:14,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:14,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:14,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:14,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:14,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:14,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:14,833 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:27:14,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:14,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:14,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:14,896 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:14,896 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:14,896 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:14,897 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:14,897 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:14,897 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:14,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:14,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:14,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:14,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:14,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:14,900 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:14,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:14,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:14,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:14,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:14,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:14,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:14,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:14,903 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:14,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:14,903 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:14,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:14,904 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:14,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:14,904 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:14,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:14,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:14,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:14,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:14,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:14,906 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:14,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:14,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:14,907 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:14,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:14,907 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a71ed7b24cb625c47cfb1b6ba9f6cdbf2879f063 [2021-10-11 02:27:15,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:15,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:15,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:15,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:15,291 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:15,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-10-11 02:27:15,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/data/4f5812b69/c14dfdb0cd7b4ea0b0e14ef9477df4ca/FLAG954138424 [2021-10-11 02:27:15,970 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:15,973 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-10-11 02:27:15,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/data/4f5812b69/c14dfdb0cd7b4ea0b0e14ef9477df4ca/FLAG954138424 [2021-10-11 02:27:16,246 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/data/4f5812b69/c14dfdb0cd7b4ea0b0e14ef9477df4ca [2021-10-11 02:27:16,251 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:16,253 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:16,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:16,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:16,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:16,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@684be36c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16, skipping insertion in model container [2021-10-11 02:27:16,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,276 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:16,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:16,702 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-10-11 02:27:16,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:16,765 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:16,795 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-10-11 02:27:16,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:16,874 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:16,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16 WrapperNode [2021-10-11 02:27:16,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:16,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:16,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:16,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:16,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,947 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:16,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:16,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:16,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:16,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:16,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:17,002 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:17,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:17,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... [2021-10-11 02:27:17,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:17,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:17,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:17,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:17,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:27:17,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:27:17,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-11 02:27:17,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:17,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-11 02:27:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:27:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-11 02:27:17,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:17,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:17,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:18,545 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:18,546 INFO L299 CfgBuilder]: Removed 137 assume(true) statements. [2021-10-11 02:27:18,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18 BoogieIcfgContainer [2021-10-11 02:27:18,549 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:18,551 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:18,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:18,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:18,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:16" (1/3) ... [2021-10-11 02:27:18,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c735146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:18, skipping insertion in model container [2021-10-11 02:27:18,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:16" (2/3) ... [2021-10-11 02:27:18,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c735146 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:18, skipping insertion in model container [2021-10-11 02:27:18,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18" (3/3) ... [2021-10-11 02:27:18,559 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-10-11 02:27:18,576 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:18,588 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2021-10-11 02:27:18,601 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-10-11 02:27:18,630 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:18,630 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:18,630 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:18,630 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:18,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:18,631 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:18,631 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:18,631 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2021-10-11 02:27:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:27:18,656 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:18,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:18,657 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:18,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:18,663 INFO L82 PathProgramCache]: Analyzing trace with hash 327102499, now seen corresponding path program 1 times [2021-10-11 02:27:18,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:18,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765691802] [2021-10-11 02:27:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:18,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765691802] [2021-10-11 02:27:18,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:18,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:27:18,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071791920] [2021-10-11 02:27:18,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:27:18,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:27:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:27:18,883 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 2 states. [2021-10-11 02:27:18,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:18,936 INFO L93 Difference]: Finished difference Result 239 states and 397 transitions. [2021-10-11 02:27:18,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:27:18,937 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-10-11 02:27:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:18,948 INFO L225 Difference]: With dead ends: 239 [2021-10-11 02:27:18,948 INFO L226 Difference]: Without dead ends: 119 [2021-10-11 02:27:18,951 INFO L677 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 [2021-10-11 02:27:18,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-11 02:27:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-11 02:27:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-10-11 02:27:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 130 transitions. [2021-10-11 02:27:18,995 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 130 transitions. Word has length 10 [2021-10-11 02:27:18,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:18,996 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 130 transitions. [2021-10-11 02:27:18,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:27:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 130 transitions. [2021-10-11 02:27:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-11 02:27:18,997 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:18,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:18,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:18,998 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:18,998 INFO L82 PathProgramCache]: Analyzing trace with hash 632006334, now seen corresponding path program 1 times [2021-10-11 02:27:18,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:18,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616248185] [2021-10-11 02:27:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:19,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616248185] [2021-10-11 02:27:19,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:19,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:27:19,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905391174] [2021-10-11 02:27:19,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:27:19,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:19,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:27:19,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:27:19,512 INFO L87 Difference]: Start difference. First operand 119 states and 130 transitions. Second operand 7 states. [2021-10-11 02:27:20,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:20,064 INFO L93 Difference]: Finished difference Result 202 states and 220 transitions. [2021-10-11 02:27:20,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:20,064 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-10-11 02:27:20,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:20,073 INFO L225 Difference]: With dead ends: 202 [2021-10-11 02:27:20,074 INFO L226 Difference]: Without dead ends: 198 [2021-10-11 02:27:20,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:27:20,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-10-11 02:27:20,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 121. [2021-10-11 02:27:20,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-10-11 02:27:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-10-11 02:27:20,106 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 13 [2021-10-11 02:27:20,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:20,107 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-10-11 02:27:20,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:27:20,107 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-10-11 02:27:20,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 02:27:20,108 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:20,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:20,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:27:20,113 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:20,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1767888354, now seen corresponding path program 1 times [2021-10-11 02:27:20,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:20,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051880379] [2021-10-11 02:27:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:20,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:20,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051880379] [2021-10-11 02:27:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-11 02:27:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850957692] [2021-10-11 02:27:20,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:27:20,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:27:20,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:27:20,397 INFO L87 Difference]: Start difference. First operand 121 states and 133 transitions. Second operand 8 states. [2021-10-11 02:27:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:20,816 INFO L93 Difference]: Finished difference Result 215 states and 235 transitions. [2021-10-11 02:27:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:27:20,817 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-10-11 02:27:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:20,820 INFO L225 Difference]: With dead ends: 215 [2021-10-11 02:27:20,821 INFO L226 Difference]: Without dead ends: 211 [2021-10-11 02:27:20,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:27:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-11 02:27:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 121. [2021-10-11 02:27:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2021-10-11 02:27:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2021-10-11 02:27:20,851 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 15 [2021-10-11 02:27:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:20,851 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2021-10-11 02:27:20,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:27:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2021-10-11 02:27:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 02:27:20,852 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:20,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:27:20,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:27:20,853 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:20,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1925780718, now seen corresponding path program 1 times [2021-10-11 02:27:20,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:20,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290920814] [2021-10-11 02:27:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:21,001 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:21,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:21,180 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:27:21,180 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:27:21,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:27:21,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:21 BoogieIcfgContainer [2021-10-11 02:27:21,226 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:21,227 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:21,227 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:21,227 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:21,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:18" (3/4) ... [2021-10-11 02:27:21,230 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:27:21,286 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bfe7dde9-cf10-4fd7-9b50-a4c5602739bf/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:21,286 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:21,288 INFO L168 Benchmark]: Toolchain (without parser) took 5034.14 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 81.0 MB in the beginning and 114.7 MB in the end (delta: -33.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:21,288 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 123.7 MB. Free memory is still 98.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:21,289 INFO L168 Benchmark]: CACSL2BoogieTranslator took 616.38 ms. Allocated memory is still 123.7 MB. Free memory was 80.8 MB in the beginning and 83.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,290 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.97 ms. Allocated memory is still 123.7 MB. Free memory was 83.0 MB in the beginning and 79.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,290 INFO L168 Benchmark]: Boogie Preprocessor took 75.82 ms. Allocated memory is still 123.7 MB. Free memory was 79.4 MB in the beginning and 76.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,291 INFO L168 Benchmark]: RCFGBuilder took 1522.24 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 76.2 MB in the beginning and 67.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 47.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,292 INFO L168 Benchmark]: TraceAbstraction took 2675.58 ms. Allocated memory is still 153.1 MB. Free memory was 67.2 MB in the beginning and 117.9 MB in the end (delta: -50.7 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,292 INFO L168 Benchmark]: Witness Printer took 59.14 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 114.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:21,296 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 123.7 MB. Free memory is still 98.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 616.38 ms. Allocated memory is still 123.7 MB. Free memory was 80.8 MB in the beginning and 83.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 73.97 ms. Allocated memory is still 123.7 MB. Free memory was 83.0 MB in the beginning and 79.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.82 ms. Allocated memory is still 123.7 MB. Free memory was 79.4 MB in the beginning and 76.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1522.24 ms. Allocated memory was 123.7 MB in the beginning and 153.1 MB in the end (delta: 29.4 MB). Free memory was 76.2 MB in the beginning and 67.2 MB in the end (delta: 9.0 MB). Peak memory consumption was 47.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2675.58 ms. Allocated memory is still 153.1 MB. Free memory was 67.2 MB in the beginning and 117.9 MB in the end (delta: -50.7 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. * Witness Printer took 59.14 ms. Allocated memory is still 153.1 MB. Free memory was 117.9 MB in the beginning and 114.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L588] struct node *list = ((void *)0); [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] struct node *list = create_sll(&p1, &p2); [L642] \read(*p1) [L642] \read(*p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 121 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 320 SDtfs, 343 SDslu, 827 SDs, 0 SdLazy, 367 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 167 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 6511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...