./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-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-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan --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 8d8f817036215afe0570c141fddfde907924f85b ............................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-12-09 12:34:52,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 12:34:52,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 12:34:52,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 12:34:52,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 12:34:53,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 12:34:53,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 12:34:53,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 12:34:53,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 12:34:53,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 12:34:53,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 12:34:53,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 12:34:53,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 12:34:53,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 12:34:53,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 12:34:53,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 12:34:53,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 12:34:53,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 12:34:53,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 12:34:53,018 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 12:34:53,020 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 12:34:53,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 12:34:53,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 12:34:53,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 12:34:53,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 12:34:53,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 12:34:53,027 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 12:34:53,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 12:34:53,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 12:34:53,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 12:34:53,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 12:34:53,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 12:34:53,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 12:34:53,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 12:34:53,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 12:34:53,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 12:34:53,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 12:34:53,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 12:34:53,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 12:34:53,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 12:34:53,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 12:34:53,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 12:34:53,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 12:34:53,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 12:34:53,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 12:34:53,059 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 12:34:53,059 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 12:34:53,059 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 12:34:53,059 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 12:34:53,059 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 12:34:53,060 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 12:34:53,060 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 12:34:53,060 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 12:34:53,060 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 12:34:53,060 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 12:34:53,061 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 12:34:53,061 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 12:34:53,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 12:34:53,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 12:34:53,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 12:34:53,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 12:34:53,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 12:34:53,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 12:34:53,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 12:34:53,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 12:34:53,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 12:34:53,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 12:34:53,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 12:34:53,064 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-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8f817036215afe0570c141fddfde907924f85b [2020-12-09 12:34:53,247 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 12:34:53,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 12:34:53,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 12:34:53,266 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 12:34:53,267 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 12:34:53,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/../../sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-09 12:34:53,312 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/data/7b406608b/232a9ec2f71c4e39ad5385fc3093b645/FLAGfad0c3bbd [2020-12-09 12:34:53,736 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 12:34:53,736 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/sv-benchmarks/c/list-properties/list_flag-1.i [2020-12-09 12:34:53,747 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/data/7b406608b/232a9ec2f71c4e39ad5385fc3093b645/FLAGfad0c3bbd [2020-12-09 12:34:53,756 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/data/7b406608b/232a9ec2f71c4e39ad5385fc3093b645 [2020-12-09 12:34:53,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 12:34:53,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 12:34:53,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 12:34:53,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 12:34:53,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 12:34:53,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:34:53" (1/1) ... [2020-12-09 12:34:53,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2923845f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:53, skipping insertion in model container [2020-12-09 12:34:53,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:34:53" (1/1) ... [2020-12-09 12:34:53,769 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 12:34:53,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 12:34:53,981 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2020-12-09 12:34:53,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:34:53,990 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 12:34:54,018 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/sv-benchmarks/c/list-properties/list_flag-1.i[23375,23388] [2020-12-09 12:34:54,019 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 12:34:54,057 INFO L208 MainTranslator]: Completed translation [2020-12-09 12:34:54,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54 WrapperNode [2020-12-09 12:34:54,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 12:34:54,058 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 12:34:54,058 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 12:34:54,058 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 12:34:54,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 12:34:54,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 12:34:54,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 12:34:54,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 12:34:54,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... [2020-12-09 12:34:54,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 12:34:54,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 12:34:54,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 12:34:54,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 12:34:54,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/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 [2020-12-09 12:34:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 12:34:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 12:34:54,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 12:34:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 12:34:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 12:34:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 12:34:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 12:34:54,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 12:34:54,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 12:34:54,450 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 12:34:54,450 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 12:34:54,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:34:54 BoogieIcfgContainer [2020-12-09 12:34:54,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 12:34:54,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 12:34:54,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 12:34:54,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 12:34:54,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:34:53" (1/3) ... [2020-12-09 12:34:54,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5f96e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:34:54, skipping insertion in model container [2020-12-09 12:34:54,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:34:54" (2/3) ... [2020-12-09 12:34:54,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f5f96e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:34:54, skipping insertion in model container [2020-12-09 12:34:54,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:34:54" (3/3) ... [2020-12-09 12:34:54,458 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-12-09 12:34:54,467 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 12:34:54,470 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 12:34:54,477 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 12:34:54,494 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 12:34:54,494 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 12:34:54,495 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 12:34:54,495 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 12:34:54,495 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 12:34:54,495 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 12:34:54,495 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 12:34:54,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 12:34:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-09 12:34:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 12:34:54,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:34:54,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:34:54,508 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:34:54,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:34:54,512 INFO L82 PathProgramCache]: Analyzing trace with hash -4285159, now seen corresponding path program 1 times [2020-12-09 12:34:54,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:34:54,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962506302] [2020-12-09 12:34:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:34:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:34:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:34:54,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962506302] [2020-12-09 12:34:54,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:34:54,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 12:34:54,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285018881] [2020-12-09 12:34:54,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 12:34:54,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:34:54,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 12:34:54,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 12:34:54,629 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-09 12:34:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:34:54,639 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2020-12-09 12:34:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 12:34:54,640 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-09 12:34:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:34:54,646 INFO L225 Difference]: With dead ends: 31 [2020-12-09 12:34:54,646 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 12:34:54,647 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 [2020-12-09 12:34:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 12:34:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 12:34:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 12:34:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-09 12:34:54,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2020-12-09 12:34:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:34:54,669 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-09 12:34:54,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 12:34:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-09 12:34:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 12:34:54,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:34:54,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:34:54,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 12:34:54,670 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:34:54,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:34:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash -100385777, now seen corresponding path program 1 times [2020-12-09 12:34:54,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:34:54,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440350361] [2020-12-09 12:34:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:34:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:34:54,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:34:54,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440350361] [2020-12-09 12:34:54,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:34:54,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:34:54,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212498897] [2020-12-09 12:34:54,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:34:54,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:34:54,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:34:54,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:34:54,740 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states. [2020-12-09 12:34:54,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:34:54,814 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-12-09 12:34:54,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:34:54,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 12:34:54,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:34:54,815 INFO L225 Difference]: With dead ends: 36 [2020-12-09 12:34:54,815 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 12:34:54,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:34:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 12:34:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-09 12:34:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 12:34:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2020-12-09 12:34:54,820 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 11 [2020-12-09 12:34:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:34:54,820 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2020-12-09 12:34:54,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:34:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2020-12-09 12:34:54,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:34:54,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:34:54,821 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:34:54,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 12:34:54,821 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:34:54,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:34:54,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1932775126, now seen corresponding path program 1 times [2020-12-09 12:34:54,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:34:54,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101053308] [2020-12-09 12:34:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:34:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:34:54,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:34:54,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101053308] [2020-12-09 12:34:54,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:34:54,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:34:54,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449603541] [2020-12-09 12:34:54,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:34:54,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:34:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:34:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:34:54,865 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 5 states. [2020-12-09 12:34:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:34:54,909 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-12-09 12:34:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:34:54,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 12:34:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:34:54,910 INFO L225 Difference]: With dead ends: 38 [2020-12-09 12:34:54,910 INFO L226 Difference]: Without dead ends: 30 [2020-12-09 12:34:54,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:34:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-09 12:34:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2020-12-09 12:34:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 12:34:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 12:34:54,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-12-09 12:34:54,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:34:54,914 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 12:34:54,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:34:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 12:34:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 12:34:54,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:34:54,915 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:34:54,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 12:34:54,915 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:34:54,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:34:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1118450649, now seen corresponding path program 1 times [2020-12-09 12:34:54,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:34:54,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258565346] [2020-12-09 12:34:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:34:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 12:34:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 12:34:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258565346] [2020-12-09 12:34:54,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 12:34:54,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 12:34:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693581098] [2020-12-09 12:34:54,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 12:34:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 12:34:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 12:34:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 12:34:54,952 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-12-09 12:34:54,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 12:34:54,998 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2020-12-09 12:34:54,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 12:34:54,999 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 12:34:54,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 12:34:54,999 INFO L225 Difference]: With dead ends: 36 [2020-12-09 12:34:54,999 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 12:34:55,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 12:34:55,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 12:34:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2020-12-09 12:34:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 12:34:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-09 12:34:55,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 13 [2020-12-09 12:34:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 12:34:55,002 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-09 12:34:55,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 12:34:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-09 12:34:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 12:34:55,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 12:34:55,003 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 12:34:55,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 12:34:55,003 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 12:34:55,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 12:34:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1143858535, now seen corresponding path program 1 times [2020-12-09 12:34:55,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 12:34:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183808004] [2020-12-09 12:34:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 12:34:55,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:34:55,024 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:34:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 12:34:55,040 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 12:34:55,057 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 12:34:55,057 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 12:34:55,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 12:34:55,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:34:55 BoogieIcfgContainer [2020-12-09 12:34:55,077 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 12:34:55,077 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 12:34:55,077 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 12:34:55,077 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 12:34:55,078 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:34:54" (3/4) ... [2020-12-09 12:34:55,079 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 12:34:55,109 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1ab49d0b-2e5f-4bc2-a28b-46b986c3c6dc/bin/utaipan/witness.graphml [2020-12-09 12:34:55,109 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 12:34:55,111 INFO L168 Benchmark]: Toolchain (without parser) took 1350.86 ms. Allocated memory was 83.9 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Free memory was 52.7 MB in the beginning and 56.8 MB in the end (delta: -4.1 MB). Peak memory consumption was 36.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,111 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:34:55,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.53 ms. Allocated memory was 83.9 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Free memory was 52.4 MB in the beginning and 89.2 MB in the end (delta: -36.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,112 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.95 ms. Allocated memory is still 123.7 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,112 INFO L168 Benchmark]: Boogie Preprocessor took 23.85 ms. Allocated memory is still 123.7 MB. Free memory was 87.1 MB in the beginning and 86.3 MB in the end (delta: 798.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 12:34:55,113 INFO L168 Benchmark]: RCFGBuilder took 328.78 ms. Allocated memory is still 123.7 MB. Free memory was 85.8 MB in the beginning and 61.1 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,113 INFO L168 Benchmark]: TraceAbstraction took 623.77 ms. Allocated memory is still 123.7 MB. Free memory was 61.1 MB in the beginning and 59.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,114 INFO L168 Benchmark]: Witness Printer took 32.32 ms. Allocated memory is still 123.7 MB. Free memory was 59.8 MB in the beginning and 56.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 12:34:55,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory is still 42.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.53 ms. Allocated memory was 83.9 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Free memory was 52.4 MB in the beginning and 89.2 MB in the end (delta: -36.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.95 ms. Allocated memory is still 123.7 MB. Free memory was 89.2 MB in the beginning and 87.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.85 ms. Allocated memory is still 123.7 MB. Free memory was 87.1 MB in the beginning and 86.3 MB in the end (delta: 798.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 328.78 ms. Allocated memory is still 123.7 MB. Free memory was 85.8 MB in the beginning and 61.1 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 623.77 ms. Allocated memory is still 123.7 MB. Free memory was 61.1 MB in the beginning and 59.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * Witness Printer took 32.32 ms. Allocated memory is still 123.7 MB. Free memory was 59.8 MB in the beginning and 56.8 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND FALSE !(\read(flag)) [L541] p->h = 2 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND FALSE !(\read(flag)) [L554] EXPR p->h [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L557] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 51 SDslu, 78 SDs, 0 SdLazy, 115 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=2, 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, 4 MinimizatonAttempts, 27 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 42 ConstructedInterpolants, 0 QuantifiedInterpolants, 1660 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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...