./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.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_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/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 79a0f3fe2cfdc34f95f5ad882c4d01fe846ad912 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-28 03:02:25,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:02:25,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:02:25,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:02:25,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:02:25,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:02:25,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:02:25,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:02:25,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:02:25,812 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:02:25,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:02:25,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:02:25,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:02:25,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:02:25,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:02:25,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:02:25,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:02:25,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:02:25,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:02:25,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:02:25,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:02:25,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:02:25,850 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:02:25,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:02:25,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:02:25,860 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:02:25,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:02:25,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:02:25,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:02:25,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:02:25,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:02:25,869 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:02:25,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:02:25,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:02:25,874 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:02:25,875 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:02:25,876 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:02:25,876 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:02:25,876 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:02:25,877 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:02:25,878 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:02:25,881 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:02:25,923 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:02:25,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:02:25,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:02:25,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:02:25,926 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:02:25,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:02:25,926 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:02:25,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:02:25,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:02:25,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:02:25,928 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:02:25,928 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:02:25,928 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:02:25,928 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:02:25,929 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:02:25,929 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:02:25,929 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:02:25,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:02:25,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:02:25,930 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:02:25,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:02:25,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:02:25,930 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:02:25,930 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:02:25,931 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:02:25,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:02:25,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:02:25,931 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:02:25,931 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:02:25,932 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_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79a0f3fe2cfdc34f95f5ad882c4d01fe846ad912 [2020-11-28 03:02:26,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:02:26,239 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:02:26,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:02:26,245 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:02:26,246 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:02:26,247 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i [2020-11-28 03:02:26,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/data/ecad42d2c/fe7d86edd07440bfb1b14bd4e4f002d1/FLAG58f573c8d [2020-11-28 03:02:26,900 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:02:26,900 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-2.i [2020-11-28 03:02:26,919 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/data/ecad42d2c/fe7d86edd07440bfb1b14bd4e4f002d1/FLAG58f573c8d [2020-11-28 03:02:27,200 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/data/ecad42d2c/fe7d86edd07440bfb1b14bd4e4f002d1 [2020-11-28 03:02:27,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:02:27,214 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:02:27,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:27,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:02:27,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:02:27,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a0ef009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27, skipping insertion in model container [2020-11-28 03:02:27,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:02:27,295 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:02:27,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:27,624 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:02:27,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:02:27,736 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:02:27,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27 WrapperNode [2020-11-28 03:02:27,737 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:02:27,738 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:27,738 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:02:27,738 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:02:27,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,766 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,790 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:02:27,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:02:27,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:02:27,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:02:27,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,808 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,832 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,839 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... [2020-11-28 03:02:27,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:02:27,843 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:02:27,843 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:02:27,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:02:27,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/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 03:02:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 03:02:27,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:02:27,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:02:27,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:02:27,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:02:28,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:02:28,528 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-11-28 03:02:28,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:28 BoogieIcfgContainer [2020-11-28 03:02:28,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:02:28,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:02:28,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:02:28,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:02:28,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:02:27" (1/3) ... [2020-11-28 03:02:28,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b06b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:28, skipping insertion in model container [2020-11-28 03:02:28,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:02:27" (2/3) ... [2020-11-28 03:02:28,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b06b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:02:28, skipping insertion in model container [2020-11-28 03:02:28,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:28" (3/3) ... [2020-11-28 03:02:28,544 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-rb-cnstr_1-2.i [2020-11-28 03:02:28,559 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:02:28,564 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-11-28 03:02:28,577 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-28 03:02:28,616 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:02:28,617 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:02:28,617 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:02:28,617 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:02:28,617 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:02:28,617 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:02:28,618 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:02:28,618 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:02:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-11-28 03:02:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 03:02:28,646 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:28,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:28,647 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1819222424, now seen corresponding path program 1 times [2020-11-28 03:02:28,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:28,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197057636] [2020-11-28 03:02:28,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:28,886 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 03:02:28,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197057636] [2020-11-28 03:02:28,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:28,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:02:28,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756439721] [2020-11-28 03:02:28,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:02:28,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:28,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:02:28,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:02:28,916 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-11-28 03:02:28,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:28,938 INFO L93 Difference]: Finished difference Result 62 states and 99 transitions. [2020-11-28 03:02:28,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:02:28,940 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-28 03:02:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:28,950 INFO L225 Difference]: With dead ends: 62 [2020-11-28 03:02:28,950 INFO L226 Difference]: Without dead ends: 26 [2020-11-28 03:02:28,963 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 [2020-11-28 03:02:28,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-28 03:02:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-28 03:02:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-28 03:02:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-28 03:02:29,009 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2020-11-28 03:02:29,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:29,009 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-28 03:02:29,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:02:29,010 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-28 03:02:29,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:02:29,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:29,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:29,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:02:29,012 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:29,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash 177875533, now seen corresponding path program 1 times [2020-11-28 03:02:29,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:29,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389984704] [2020-11-28 03:02:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,140 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 03:02:29,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389984704] [2020-11-28 03:02:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:29,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:02:29,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576506702] [2020-11-28 03:02:29,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:02:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:29,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:02:29,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:02:29,144 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-11-28 03:02:29,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:29,242 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-11-28 03:02:29,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:02:29,243 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 03:02:29,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:29,244 INFO L225 Difference]: With dead ends: 35 [2020-11-28 03:02:29,244 INFO L226 Difference]: Without dead ends: 32 [2020-11-28 03:02:29,245 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 03:02:29,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-28 03:02:29,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-11-28 03:02:29,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-28 03:02:29,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-28 03:02:29,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2020-11-28 03:02:29,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:29,252 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-28 03:02:29,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:02:29,252 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-28 03:02:29,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:02:29,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:29,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:29,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:02:29,253 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:29,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:29,254 INFO L82 PathProgramCache]: Analyzing trace with hash -574954344, now seen corresponding path program 1 times [2020-11-28 03:02:29,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:29,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597828364] [2020-11-28 03:02:29,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,390 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 03:02:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597828364] [2020-11-28 03:02:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:29,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:02:29,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232115133] [2020-11-28 03:02:29,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:02:29,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:29,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:29,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:29,393 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-11-28 03:02:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:29,571 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-11-28 03:02:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:02:29,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 03:02:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:29,574 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:02:29,575 INFO L226 Difference]: Without dead ends: 49 [2020-11-28 03:02:29,575 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 [2020-11-28 03:02:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-28 03:02:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 30. [2020-11-28 03:02:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 03:02:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-28 03:02:29,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2020-11-28 03:02:29,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:29,587 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-28 03:02:29,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:02:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-28 03:02:29,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:02:29,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:29,588 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:29,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:02:29,588 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:29,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:29,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1915994638, now seen corresponding path program 1 times [2020-11-28 03:02:29,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:29,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341056557] [2020-11-28 03:02:29,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:29,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341056557] [2020-11-28 03:02:29,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004599364] [2020-11-28 03:02:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/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 03:02:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:29,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-28 03:02:30,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:02:30,072 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-28 03:02:30,073 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,090 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,097 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-11-28 03:02:30,098 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,116 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,117 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:24 [2020-11-28 03:02:30,381 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,381 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2020-11-28 03:02:30,383 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,499 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-11-28 03:02:30,501 INFO L625 ElimStorePlain]: treesize reduction 14, result has 88.9 percent of original size [2020-11-28 03:02:30,527 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:30,568 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:30,585 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 20 [2020-11-28 03:02:30,586 INFO L545 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,643 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:30,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:30,659 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2020-11-28 03:02:30,660 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,688 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:30,698 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,723 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 4 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:02:30,723 INFO L244 ElimStorePlain]: Needed 6 recursive calls to eliminate 8 variables, input treesize:114, output treesize:27 [2020-11-28 03:02:30,967 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:30,968 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 26 [2020-11-28 03:02:30,969 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:31,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,054 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_31|, |v_#memory_int_32|, |v_#memory_int_33|, |v_#memory_$Pointer$.base_23|], 4=[|v_#memory_int_35|]} [2020-11-28 03:02:31,058 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:31,122 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,126 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:31,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,182 INFO L545 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:31,224 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:31,230 INFO L545 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:31,255 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-28 03:02:31,336 INFO L350 Elim1Store]: treesize reduction 65, result has 46.7 percent of original size [2020-11-28 03:02:31,336 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 85 [2020-11-28 03:02:31,337 INFO L545 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:31,436 INFO L625 ElimStorePlain]: treesize reduction 18, result has 81.4 percent of original size [2020-11-28 03:02:31,467 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 5 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-11-28 03:02:31,467 INFO L244 ElimStorePlain]: Needed 7 recursive calls to eliminate 11 variables, input treesize:249, output treesize:43 [2020-11-28 03:02:31,688 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2020-11-28 03:02:31,690 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 03:02:31,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 03:02:31,702 INFO L545 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 03:02:31,702 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:45, output treesize:3 [2020-11-28 03:02:31,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:02:31,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:02:31,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-28 03:02:31,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174695313] [2020-11-28 03:02:31,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 03:02:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:31,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 03:02:31,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-28 03:02:31,708 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 11 states. [2020-11-28 03:02:32,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:32,573 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-11-28 03:02:32,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:02:32,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-28 03:02:32,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:32,582 INFO L225 Difference]: With dead ends: 65 [2020-11-28 03:02:32,583 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 03:02:32,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:02:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 03:02:32,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 20. [2020-11-28 03:02:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-28 03:02:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-28 03:02:32,592 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2020-11-28 03:02:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:32,593 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-28 03:02:32,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 03:02:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-28 03:02:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:02:32,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:32,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:32,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:02:32,813 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:32,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:32,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1796257513, now seen corresponding path program 1 times [2020-11-28 03:02:32,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:32,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991670650] [2020-11-28 03:02:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:02:32,924 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 03:02:32,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991670650] [2020-11-28 03:02:32,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:02:32,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:02:32,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129935388] [2020-11-28 03:02:32,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:02:32,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:02:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:02:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:02:32,927 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 5 states. [2020-11-28 03:02:33,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:02:33,034 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-11-28 03:02:33,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:02:33,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-28 03:02:33,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:02:33,035 INFO L225 Difference]: With dead ends: 38 [2020-11-28 03:02:33,035 INFO L226 Difference]: Without dead ends: 29 [2020-11-28 03:02:33,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:02:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-28 03:02:33,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2020-11-28 03:02:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 03:02:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-28 03:02:33,041 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 16 [2020-11-28 03:02:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:02:33,041 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-28 03:02:33,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:02:33,041 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-28 03:02:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:02:33,042 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:02:33,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:02:33,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:02:33,042 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:02:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:02:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1798104555, now seen corresponding path program 1 times [2020-11-28 03:02:33,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:02:33,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393742066] [2020-11-28 03:02:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:02:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:33,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:02:33,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:02:33,136 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:02:33,136 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:02:33,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:02:33,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:02:33 BoogieIcfgContainer [2020-11-28 03:02:33,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:02:33,186 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:02:33,187 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:02:33,187 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:02:33,187 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:02:28" (3/4) ... [2020-11-28 03:02:33,189 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:02:33,259 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f73d6b49-5bb1-434f-a60e-ac38ef7c4d4e/bin/uautomizer/witness.graphml [2020-11-28 03:02:33,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:02:33,260 INFO L168 Benchmark]: Toolchain (without parser) took 6045.80 ms. Allocated memory was 88.1 MB in the beginning and 130.0 MB in the end (delta: 41.9 MB). Free memory was 55.0 MB in the beginning and 99.6 MB in the end (delta: -44.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:33,261 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:33,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 519.73 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 52.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:33,262 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.39 ms. Allocated memory is still 88.1 MB. Free memory was 52.8 MB in the beginning and 50.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:33,267 INFO L168 Benchmark]: Boogie Preprocessor took 51.37 ms. Allocated memory is still 88.1 MB. Free memory was 50.7 MB in the beginning and 49.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:33,268 INFO L168 Benchmark]: RCFGBuilder took 687.40 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.0 MB in the beginning and 74.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:33,268 INFO L168 Benchmark]: TraceAbstraction took 4653.35 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 74.2 MB in the beginning and 101.7 MB in the end (delta: -27.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:02:33,269 INFO L168 Benchmark]: Witness Printer took 72.69 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 99.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:02:33,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 88.1 MB. Free memory is still 47.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 519.73 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 52.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.39 ms. Allocated memory is still 88.1 MB. Free memory was 52.8 MB in the beginning and 50.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.37 ms. Allocated memory is still 88.1 MB. Free memory was 50.7 MB in the beginning and 49.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 687.40 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 49.0 MB in the beginning and 74.8 MB in the end (delta: -25.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4653.35 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 74.2 MB in the beginning and 101.7 MB in the end (delta: -27.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 72.69 ms. Allocated memory is still 130.0 MB. Free memory was 101.7 MB in the beginning and 99.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 991]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1005] SLL* list = malloc(sizeof(SLL)); [L1006] list->next = ((void*)0) [L1007] list->prev = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1036] end = ((void*)0) [L1037] end = list [L1040] COND FALSE !(!(((void*)0) != end)) [L1041] EXPR end->colour [L1041] COND FALSE !(!(BLACK == end->colour)) [L1043] COND TRUE ((void*)0) != end [L1045] EXPR end->colour [L1045] COND FALSE !(RED == end->colour) [L1051] EXPR end->next [L1051] COND TRUE !(end->next) [L991] COND FALSE !(0) [L991] __assert_fail ("0", "dll-rb-cnstr_1-2.c", 11, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 137 SDtfs, 165 SDslu, 223 SDs, 0 SdLazy, 213 SolverSat, 45 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred 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, 5 MinimizatonAttempts, 77 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 64 ConstructedInterpolants, 6 QuantifiedInterpolants, 7783 SizeOfPredicates, 14 NumberOfNonLiveVariables, 105 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 0/4 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...