./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 ................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:19:11,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:19:11,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:19:11,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:19:11,825 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:19:11,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:19:11,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:19:11,831 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:19:11,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:19:11,835 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:19:11,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:19:11,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:19:11,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:19:11,840 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:19:11,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:19:11,844 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:19:11,845 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:19:11,846 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:19:11,849 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:19:11,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:19:11,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:19:11,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:19:11,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:19:11,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:19:11,863 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:19:11,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:19:11,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:19:11,866 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:19:11,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:19:11,868 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:19:11,868 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:19:11,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:19:11,870 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:19:11,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:19:11,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:19:11,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:19:11,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:19:11,875 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:19:11,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:19:11,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:19:11,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:19:11,879 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:19:11,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:19:11,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:19:11,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:19:11,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:19:11,907 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:19:11,908 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:19:11,908 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:19:11,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:19:11,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:19:11,909 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:19:11,909 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:19:11,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:19:11,910 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:19:11,910 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:19:11,910 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:19:11,910 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:19:11,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:19:11,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:19:11,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:19:11,912 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:19:11,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:19:11,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:19:11,913 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:19:11,913 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:19:11,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:19:11,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:19:11,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:19:11,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:19:11,914 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:19:11,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a501c55d63fd9a2de7fb7a25d7fd900352e0181 [2020-11-28 03:19:12,139 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:19:12,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:19:12,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:19:12,169 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:19:12,171 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:19:12,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2020-11-28 03:19:12,259 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/data/0ee583beb/4e6d3a5583ca4e9eb65fdc9f1eb26959/FLAGf80ac8751 [2020-11-28 03:19:12,883 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:19:12,887 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/sv-benchmarks/c/list-simple/dll2n_update_all_reverse.i [2020-11-28 03:19:12,898 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/data/0ee583beb/4e6d3a5583ca4e9eb65fdc9f1eb26959/FLAGf80ac8751 [2020-11-28 03:19:13,190 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/data/0ee583beb/4e6d3a5583ca4e9eb65fdc9f1eb26959 [2020-11-28 03:19:13,193 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:19:13,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:19:13,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:13,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:19:13,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:19:13,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5981ea12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13, skipping insertion in model container [2020-11-28 03:19:13,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:19:13,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:19:13,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:13,657 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:19:13,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:19:13,778 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:19:13,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13 WrapperNode [2020-11-28 03:19:13,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:19:13,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:19:13,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:19:13,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:19:13,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,807 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:19:13,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:19:13,833 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:19:13,833 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:19:13,843 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... [2020-11-28 03:19:13,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:19:13,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:19:13,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:19:13,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:19:13,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/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 [2020-11-28 03:19:13,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:19:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:19:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:19:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 03:19:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:19:13,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 03:19:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:19:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:19:13,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:19:13,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:19:14,369 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:19:14,369 INFO L298 CfgBuilder]: Removed 22 assume(true) statements. [2020-11-28 03:19:14,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:14 BoogieIcfgContainer [2020-11-28 03:19:14,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:19:14,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:19:14,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:19:14,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:19:14,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:19:13" (1/3) ... [2020-11-28 03:19:14,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d81b84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:14, skipping insertion in model container [2020-11-28 03:19:14,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:19:13" (2/3) ... [2020-11-28 03:19:14,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d81b84a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:19:14, skipping insertion in model container [2020-11-28 03:19:14,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:14" (3/3) ... [2020-11-28 03:19:14,380 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_update_all_reverse.i [2020-11-28 03:19:14,390 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:19:14,394 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:19:14,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:19:14,428 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:19:14,428 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:19:14,428 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:19:14,428 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:19:14,429 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:19:14,429 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:19:14,429 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:19:14,429 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:19:14,443 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-28 03:19:14,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 03:19:14,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:14,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:14,449 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:14,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:14,455 INFO L82 PathProgramCache]: Analyzing trace with hash 880239487, now seen corresponding path program 1 times [2020-11-28 03:19:14,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:14,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840779592] [2020-11-28 03:19:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:19:14,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840779592] [2020-11-28 03:19:14,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:14,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:19:14,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63075476] [2020-11-28 03:19:14,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:19:14,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:14,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:19:14,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:14,697 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-11-28 03:19:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:14,751 INFO L93 Difference]: Finished difference Result 61 states and 91 transitions. [2020-11-28 03:19:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:19:14,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-28 03:19:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:14,764 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:19:14,765 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:19:14,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:19:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-28 03:19:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-28 03:19:14,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-11-28 03:19:14,820 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 15 [2020-11-28 03:19:14,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:14,821 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-11-28 03:19:14,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:19:14,821 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-11-28 03:19:14,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:19:14,823 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:14,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:14,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:19:14,825 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:14,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:14,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1809396756, now seen corresponding path program 1 times [2020-11-28 03:19:14,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:14,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145791081] [2020-11-28 03:19:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:19:14,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145791081] [2020-11-28 03:19:14,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:19:14,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653920598] [2020-11-28 03:19:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:19:14,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:14,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:19:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:14,948 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 3 states. [2020-11-28 03:19:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:14,978 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-11-28 03:19:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:19:14,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-11-28 03:19:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:14,981 INFO L225 Difference]: With dead ends: 51 [2020-11-28 03:19:14,981 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:19:14,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:19:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:19:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-28 03:19:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:19:14,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-28 03:19:14,989 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 20 [2020-11-28 03:19:14,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:14,990 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-28 03:19:14,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:19:14,990 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-28 03:19:14,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:19:14,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:14,992 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:14,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:19:14,993 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:14,995 INFO L82 PathProgramCache]: Analyzing trace with hash 529533078, now seen corresponding path program 1 times [2020-11-28 03:19:14,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:14,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098775707] [2020-11-28 03:19:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:19:15,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098775707] [2020-11-28 03:19:15,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035970571] [2020-11-28 03:19:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:19:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:15,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:19:15,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:19:15,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:19:15,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:19:15,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-28 03:19:15,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394272690] [2020-11-28 03:19:15,274 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:19:15,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:15,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:19:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:15,275 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-11-28 03:19:15,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:15,302 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-11-28 03:19:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:15,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-11-28 03:19:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:15,303 INFO L225 Difference]: With dead ends: 47 [2020-11-28 03:19:15,303 INFO L226 Difference]: Without dead ends: 30 [2020-11-28 03:19:15,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-28 03:19:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-28 03:19:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:19:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-28 03:19:15,309 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 20 [2020-11-28 03:19:15,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:15,310 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-28 03:19:15,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:19:15,310 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-28 03:19:15,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-28 03:19:15,311 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:19:15,311 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:19:15,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-28 03:19:15,530 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:19:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:19:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1721705821, now seen corresponding path program 1 times [2020-11-28 03:19:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:19:15,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193208703] [2020-11-28 03:19:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:19:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:19:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:19:15,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193208703] [2020-11-28 03:19:15,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:19:15,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:19:15,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439885809] [2020-11-28 03:19:15,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:19:15,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:19:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:19:15,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:19:15,634 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-11-28 03:19:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:19:15,668 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2020-11-28 03:19:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:19:15,669 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-11-28 03:19:15,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:19:15,669 INFO L225 Difference]: With dead ends: 36 [2020-11-28 03:19:15,669 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:19:15,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:19:15,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:19:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:19:15,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:19:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:19:15,671 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-11-28 03:19:15,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:19:15,671 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:19:15,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:19:15,671 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:19:15,672 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:19:15,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:19:15,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:19:15,748 INFO L274 CegarLoopResult]: For program point L589(lines 589 591) no Hoare annotation was computed. [2020-11-28 03:19:15,748 INFO L274 CegarLoopResult]: For program point L589-1(lines 589 591) no Hoare annotation was computed. [2020-11-28 03:19:15,748 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:19:15,748 INFO L277 CegarLoopResult]: At program point L573(line 573) the Hoare annotation is: true [2020-11-28 03:19:15,748 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L270 CegarLoopResult]: At program point L615(lines 610 616) the Hoare annotation is: false [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L633-2(lines 633 638) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L270 CegarLoopResult]: At program point L633-3(lines 633 638) the Hoare annotation is: (and (= ULTIMATE.start_main_~len~0 2) (<= 1 ULTIMATE.start_main_~i~0)) [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L633-4(lines 633 638) no Hoare annotation was computed. [2020-11-28 03:19:15,749 INFO L274 CegarLoopResult]: For program point L617(lines 1 643) no Hoare annotation was computed. [2020-11-28 03:19:15,750 INFO L277 CegarLoopResult]: At program point L642(lines 624 643) the Hoare annotation is: true [2020-11-28 03:19:15,750 INFO L270 CegarLoopResult]: At program point L601(lines 585 602) the Hoare annotation is: (= ULTIMATE.start_main_~len~0 2) [2020-11-28 03:19:15,750 INFO L270 CegarLoopResult]: At program point L618-2(lines 618 621) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2020-11-28 03:19:15,750 INFO L274 CegarLoopResult]: For program point L618-3(lines 618 621) no Hoare annotation was computed. [2020-11-28 03:19:15,750 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-28 03:19:15,750 INFO L274 CegarLoopResult]: For program point L635(lines 635 637) no Hoare annotation was computed. [2020-11-28 03:19:15,750 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L270 CegarLoopResult]: At program point L611-2(lines 611 614) the Hoare annotation is: false [2020-11-28 03:19:15,751 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L274 CegarLoopResult]: For program point L611-3(lines 611 614) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L270 CegarLoopResult]: At program point L636(lines 624 643) the Hoare annotation is: false [2020-11-28 03:19:15,751 INFO L274 CegarLoopResult]: For program point L603(lines 603 609) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L274 CegarLoopResult]: For program point L595(lines 595 597) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L274 CegarLoopResult]: For program point L595-2(lines 595 597) no Hoare annotation was computed. [2020-11-28 03:19:15,751 INFO L270 CegarLoopResult]: At program point L587-2(lines 587 600) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2020-11-28 03:19:15,752 INFO L274 CegarLoopResult]: For program point L587-3(lines 587 600) no Hoare annotation was computed. [2020-11-28 03:19:15,752 INFO L277 CegarLoopResult]: At program point L604-2(lines 604 608) the Hoare annotation is: true [2020-11-28 03:19:15,752 INFO L270 CegarLoopResult]: At program point L629-2(lines 629 632) the Hoare annotation is: (= 2 ULTIMATE.start_main_~len~0) [2020-11-28 03:19:15,752 INFO L274 CegarLoopResult]: For program point L629-3(lines 629 632) no Hoare annotation was computed. [2020-11-28 03:19:15,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:19:15 BoogieIcfgContainer [2020-11-28 03:19:15,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:19:15,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:19:15,771 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:19:15,771 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:19:15,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:19:14" (3/4) ... [2020-11-28 03:19:15,775 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:19:15,788 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-28 03:19:15,788 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 03:19:15,788 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:19:15,789 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 03:19:15,858 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_71f2f305-2449-44dd-8bd2-01333a07a312/bin/uautomizer/witness.graphml [2020-11-28 03:19:15,859 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:19:15,860 INFO L168 Benchmark]: Toolchain (without parser) took 2664.84 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 60.1 MB in the beginning and 56.0 MB in the end (delta: 4.1 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,861 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 51.0 MB in the beginning and 51.0 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:19:15,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 582.57 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 56.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.52 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 54.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,862 INFO L168 Benchmark]: Boogie Preprocessor took 52.57 ms. Allocated memory is still 92.3 MB. Free memory was 54.7 MB in the beginning and 53.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,863 INFO L168 Benchmark]: RCFGBuilder took 485.54 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 53.0 MB in the beginning and 86.1 MB in the end (delta: -33.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,870 INFO L168 Benchmark]: TraceAbstraction took 1397.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.1 MB in the beginning and 59.5 MB in the end (delta: 25.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,871 INFO L168 Benchmark]: Witness Printer took 87.80 ms. Allocated memory is still 111.1 MB. Free memory was 59.5 MB in the beginning and 56.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:19:15,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 92.3 MB. Free memory was 51.0 MB in the beginning and 51.0 MB in the end (delta: 35.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 582.57 ms. Allocated memory is still 92.3 MB. Free memory was 59.9 MB in the beginning and 56.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.52 ms. Allocated memory is still 92.3 MB. Free memory was 56.7 MB in the beginning and 54.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 52.57 ms. Allocated memory is still 92.3 MB. Free memory was 54.7 MB in the beginning and 53.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 485.54 ms. Allocated memory was 92.3 MB in the beginning and 111.1 MB in the end (delta: 18.9 MB). Free memory was 53.0 MB in the beginning and 86.1 MB in the end (delta: -33.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1397.03 ms. Allocated memory is still 111.1 MB. Free memory was 85.1 MB in the beginning and 59.5 MB in the end (delta: 25.6 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Witness Printer took 87.80 ms. Allocated memory is still 111.1 MB. Free memory was 59.5 MB in the beginning and 56.0 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 585]: Loop Invariant Derived loop invariant: len == 2 - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 629]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 618]: Loop Invariant Derived loop invariant: 2 == len - InvariantResult [Line: 573]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 610]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 624]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 611]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 633]: Loop Invariant Derived loop invariant: len == 2 && 1 <= i - InvariantResult [Line: 604]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 104 SDtfs, 33 SDslu, 116 SDs, 0 SdLazy, 26 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 4 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 11 PreInvPairs, 23 NumberOfFragments, 25 HoareAnnotationTreeSize, 11 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3467 SizeOfPredicates, 3 NumberOfNonLiveVariables, 111 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 8/10 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 correct! Received shutdown request...