./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_flag-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_flag-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/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 8d8f817036215afe0570c141fddfde907924f85b ........................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:56:44,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:56:44,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:56:44,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:56:44,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:56:44,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:56:44,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:56:44,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:56:44,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:56:44,975 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:56:44,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:56:44,978 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:56:44,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:56:44,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:56:44,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:56:44,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:56:44,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:56:44,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:56:44,988 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:56:44,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:56:44,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:56:44,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:56:44,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:56:44,997 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:56:45,001 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:56:45,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:56:45,002 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:56:45,003 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:56:45,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:56:45,006 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:56:45,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:56:45,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:56:45,008 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:56:45,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:56:45,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:56:45,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:56:45,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:56:45,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:56:45,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:56:45,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:56:45,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:56:45,016 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:56:45,039 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:56:45,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:56:45,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:56:45,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:56:45,041 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:56:45,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:56:45,042 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:56:45,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:56:45,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:56:45,043 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:56:45,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:56:45,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:56:45,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:56:45,044 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:56:45,044 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:56:45,044 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:56:45,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:56:45,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:56:45,045 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:56:45,045 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:56:45,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:56:45,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:56:45,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:56:45,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:56:45,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:56:45,047 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:56:45,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:56:45,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:56:45,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:56:45,048 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_f0cad217-66e4-453e-9a59-082f29b232fb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d8f817036215afe0570c141fddfde907924f85b [2020-11-28 02:56:45,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:56:45,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:56:45,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:56:45,430 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:56:45,432 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:56:45,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/../../sv-benchmarks/c/list-properties/list_flag-1.i [2020-11-28 02:56:45,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/data/f452b8949/eb199d8a38ce47b9bcf02c53a791f63a/FLAG78d8adddf [2020-11-28 02:56:46,108 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:56:46,108 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/sv-benchmarks/c/list-properties/list_flag-1.i [2020-11-28 02:56:46,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/data/f452b8949/eb199d8a38ce47b9bcf02c53a791f63a/FLAG78d8adddf [2020-11-28 02:56:46,408 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/data/f452b8949/eb199d8a38ce47b9bcf02c53a791f63a [2020-11-28 02:56:46,411 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:56:46,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:56:46,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:46,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:56:46,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:56:46,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:46" (1/1) ... [2020-11-28 02:56:46,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e67ea6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:46, skipping insertion in model container [2020-11-28 02:56:46,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:56:46" (1/1) ... [2020-11-28 02:56:46,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:56:46,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:56:46,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:46,940 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:56:47,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:56:47,082 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:56:47,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47 WrapperNode [2020-11-28 02:56:47,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:56:47,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:47,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:56:47,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:56:47,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:56:47,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:56:47,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:56:47,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:56:47,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... [2020-11-28 02:56:47,166 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:56:47,167 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:56:47,168 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:56:47,168 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:56:47,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/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 02:56:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:56:47,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:56:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:56:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 02:56:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:56:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 02:56:47,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:56:47,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:56:47,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:56:47,786 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:56:47,786 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-28 02:56:47,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:47 BoogieIcfgContainer [2020-11-28 02:56:47,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:56:47,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:56:47,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:56:47,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:56:47,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:56:46" (1/3) ... [2020-11-28 02:56:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9cbf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:47, skipping insertion in model container [2020-11-28 02:56:47,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:56:47" (2/3) ... [2020-11-28 02:56:47,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52c9cbf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:56:47, skipping insertion in model container [2020-11-28 02:56:47,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:47" (3/3) ... [2020-11-28 02:56:47,797 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2020-11-28 02:56:47,809 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:56:47,820 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 02:56:47,830 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 02:56:47,868 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:56:47,869 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:56:47,870 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:56:47,870 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:56:47,870 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:56:47,871 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:56:47,871 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:56:47,871 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:56:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-11-28 02:56:47,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 02:56:47,890 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:47,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:47,891 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1518085449, now seen corresponding path program 1 times [2020-11-28 02:56:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:47,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624607603] [2020-11-28 02:56:47,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:48,051 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 02:56:48,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624607603] [2020-11-28 02:56:48,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:48,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:56:48,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245327566] [2020-11-28 02:56:48,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:56:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:48,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:56:48,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:56:48,079 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-11-28 02:56:48,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:48,094 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2020-11-28 02:56:48,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:56:48,095 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-28 02:56:48,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:48,102 INFO L225 Difference]: With dead ends: 43 [2020-11-28 02:56:48,103 INFO L226 Difference]: Without dead ends: 22 [2020-11-28 02:56:48,106 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 02:56:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-28 02:56:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-11-28 02:56:48,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-28 02:56:48,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-28 02:56:48,142 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-11-28 02:56:48,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:48,143 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-28 02:56:48,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:56:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-28 02:56:48,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 02:56:48,144 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:48,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:48,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:56:48,145 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:48,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:48,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1194268909, now seen corresponding path program 1 times [2020-11-28 02:56:48,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:48,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320321577] [2020-11-28 02:56:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:48,287 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 02:56:48,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320321577] [2020-11-28 02:56:48,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:48,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:56:48,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791306468] [2020-11-28 02:56:48,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:56:48,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:56:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:48,292 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2020-11-28 02:56:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:48,457 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2020-11-28 02:56:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:56:48,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-28 02:56:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:48,459 INFO L225 Difference]: With dead ends: 50 [2020-11-28 02:56:48,459 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 02:56:48,460 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 02:56:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 02:56:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2020-11-28 02:56:48,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-28 02:56:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-11-28 02:56:48,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 15 [2020-11-28 02:56:48,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:48,475 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-11-28 02:56:48,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:56:48,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-11-28 02:56:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:56:48,477 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:48,478 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:48,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:56:48,479 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:48,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:48,480 INFO L82 PathProgramCache]: Analyzing trace with hash 466716680, now seen corresponding path program 1 times [2020-11-28 02:56:48,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:48,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401846963] [2020-11-28 02:56:48,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:48,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401846963] [2020-11-28 02:56:48,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:48,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:56:48,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498089499] [2020-11-28 02:56:48,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:56:48,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:48,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:56:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:48,612 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2020-11-28 02:56:48,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:48,731 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-11-28 02:56:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:56:48,732 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-28 02:56:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:48,733 INFO L225 Difference]: With dead ends: 52 [2020-11-28 02:56:48,733 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 02:56:48,734 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 02:56:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 02:56:48,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-11-28 02:56:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 02:56:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-28 02:56:48,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2020-11-28 02:56:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:48,740 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-28 02:56:48,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:56:48,740 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-28 02:56:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:56:48,741 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:48,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:48,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:56:48,741 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash -767976713, now seen corresponding path program 1 times [2020-11-28 02:56:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:48,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546870216] [2020-11-28 02:56:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:48,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546870216] [2020-11-28 02:56:48,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:48,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:56:48,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586404915] [2020-11-28 02:56:48,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:56:48,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:48,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:56:48,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:56:48,854 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-11-28 02:56:48,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:48,969 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-11-28 02:56:48,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:56:48,970 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-28 02:56:48,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:48,971 INFO L225 Difference]: With dead ends: 50 [2020-11-28 02:56:48,971 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 02:56:48,971 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 02:56:48,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 02:56:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 24. [2020-11-28 02:56:48,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 02:56:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-28 02:56:48,975 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2020-11-28 02:56:48,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:48,976 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-28 02:56:48,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:56:48,976 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-28 02:56:48,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 02:56:48,978 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:48,979 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:48,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:56:48,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:48,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1548345954, now seen corresponding path program 1 times [2020-11-28 02:56:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:48,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469950362] [2020-11-28 02:56:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:56:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:56:49,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469950362] [2020-11-28 02:56:49,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:56:49,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 02:56:49,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504232507] [2020-11-28 02:56:49,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 02:56:49,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:56:49,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:56:49,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:56:49,035 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2020-11-28 02:56:49,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:56:49,069 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-11-28 02:56:49,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:56:49,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-28 02:56:49,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:56:49,070 INFO L225 Difference]: With dead ends: 56 [2020-11-28 02:56:49,070 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 02:56:49,070 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 02:56:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 02:56:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-11-28 02:56:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-28 02:56:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-11-28 02:56:49,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 21 [2020-11-28 02:56:49,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:56:49,075 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-11-28 02:56:49,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 02:56:49,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-11-28 02:56:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 02:56:49,076 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:56:49,077 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:56:49,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:56:49,077 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:56:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:56:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 318904113, now seen corresponding path program 1 times [2020-11-28 02:56:49,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:56:49,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934525636] [2020-11-28 02:56:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:56:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:49,116 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:56:49,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:56:49,160 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:56:49,161 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:56:49,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:56:49,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:56:49 BoogieIcfgContainer [2020-11-28 02:56:49,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:56:49,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:56:49,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:56:49,216 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:56:49,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:56:47" (3/4) ... [2020-11-28 02:56:49,219 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:56:49,271 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f0cad217-66e4-453e-9a59-082f29b232fb/bin/uautomizer/witness.graphml [2020-11-28 02:56:49,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:56:49,274 INFO L168 Benchmark]: Toolchain (without parser) took 2859.40 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 52.3 MB in the beginning and 44.7 MB in the end (delta: 7.6 MB). Peak memory consumption was 25.7 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,274 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 69.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:49,275 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.22 ms. Allocated memory is still 90.2 MB. Free memory was 52.1 MB in the beginning and 53.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,276 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 90.2 MB. Free memory was 53.9 MB in the beginning and 52.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,276 INFO L168 Benchmark]: Boogie Preprocessor took 32.53 ms. Allocated memory is still 90.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:56:49,277 INFO L168 Benchmark]: RCFGBuilder took 620.66 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.4 MB in the beginning and 84.3 MB in the end (delta: -33.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,278 INFO L168 Benchmark]: TraceAbstraction took 1425.96 ms. Allocated memory is still 109.1 MB. Free memory was 83.7 MB in the beginning and 46.8 MB in the end (delta: 36.9 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,279 INFO L168 Benchmark]: Witness Printer took 55.82 ms. Allocated memory is still 109.1 MB. Free memory was 46.8 MB in the beginning and 44.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:56:49,282 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 69.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 668.22 ms. Allocated memory is still 90.2 MB. Free memory was 52.1 MB in the beginning and 53.9 MB in the end (delta: -1.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.60 ms. Allocated memory is still 90.2 MB. Free memory was 53.9 MB in the beginning and 52.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.53 ms. Allocated memory is still 90.2 MB. Free memory was 52.0 MB in the beginning and 50.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 620.66 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 50.4 MB in the beginning and 84.3 MB in the end (delta: -33.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1425.96 ms. Allocated memory is still 109.1 MB. Free memory was 83.7 MB in the beginning and 46.8 MB in the end (delta: 36.9 MB). Peak memory consumption was 38.0 MB. Max. memory is 16.1 GB. * Witness Printer took 55.82 ms. Allocated memory is still 109.1 MB. Free memory was 46.8 MB in the beginning and 44.7 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: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 1 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND TRUE p->h != 3 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "list_flag-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 79 SDslu, 161 SDs, 0 SdLazy, 138 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=5, 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, 48 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 104 NumberOfCodeBlocks, 104 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 3312 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...