./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-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_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/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 c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2020-11-29 22:01:39,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:01:39,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:01:39,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:01:39,873 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:01:39,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:01:39,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:01:39,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:01:39,890 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:01:39,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:01:39,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:01:39,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:01:39,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:01:39,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:01:39,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:01:39,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:01:39,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:01:39,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:01:39,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:01:39,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:01:39,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:01:39,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:01:39,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:01:39,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:01:39,948 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:01:39,949 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:01:39,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:01:39,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:01:39,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:01:39,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:01:39,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:01:39,956 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:01:39,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:01:39,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:01:39,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:01:39,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:01:39,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:01:39,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:01:39,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:01:39,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:01:39,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:01:39,970 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:01:40,011 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:01:40,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:01:40,014 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:01:40,014 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:01:40,014 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:01:40,015 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:01:40,015 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:01:40,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:01:40,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:01:40,016 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:01:40,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:01:40,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:01:40,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:01:40,018 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:01:40,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:01:40,018 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:01:40,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:01:40,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:01:40,019 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:01:40,019 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:01:40,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:01:40,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:01:40,020 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:01:40,020 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:01:40,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:01:40,021 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:01:40,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:01:40,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:01:40,022 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:01:40,022 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_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2020-11-29 22:01:40,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:01:40,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:01:40,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:01:40,385 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:01:40,386 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:01:40,387 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-11-29 22:01:40,472 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/data/f29969c89/f194194cd0a14b11ac46b6e4cff968c4/FLAGd20a30661 [2020-11-29 22:01:41,146 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:01:41,149 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2020-11-29 22:01:41,165 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/data/f29969c89/f194194cd0a14b11ac46b6e4cff968c4/FLAGd20a30661 [2020-11-29 22:01:41,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/data/f29969c89/f194194cd0a14b11ac46b6e4cff968c4 [2020-11-29 22:01:41,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:01:41,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:01:41,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:01:41,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:01:41,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:01:41,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:01:41" (1/1) ... [2020-11-29 22:01:41,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338dc606 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:41, skipping insertion in model container [2020-11-29 22:01:41,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:01:41" (1/1) ... [2020-11-29 22:01:41,423 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:01:41,493 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:01:41,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:01:41,889 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:01:41,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:01:42,024 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:01:42,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42 WrapperNode [2020-11-29 22:01:42,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:01:42,026 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:01:42,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:01:42,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:01:42,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,050 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,076 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:01:42,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:01:42,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:01:42,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:01:42,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,108 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... [2020-11-29 22:01:42,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:01:42,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:01:42,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:01:42,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:01:42,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/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 [2020-11-29 22:01:42,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 22:01:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 22:01:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 22:01:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 22:01:42,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 22:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 22:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:01:42,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:01:42,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:01:42,700 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:01:42,700 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 22:01:42,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:01:42 BoogieIcfgContainer [2020-11-29 22:01:42,702 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:01:42,704 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:01:42,704 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:01:42,726 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:01:42,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:01:41" (1/3) ... [2020-11-29 22:01:42,727 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c8f483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:01:42, skipping insertion in model container [2020-11-29 22:01:42,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:01:42" (2/3) ... [2020-11-29 22:01:42,728 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24c8f483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:01:42, skipping insertion in model container [2020-11-29 22:01:42,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:01:42" (3/3) ... [2020-11-29 22:01:42,730 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2020-11-29 22:01:42,741 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:01:42,746 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:01:42,758 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:01:42,797 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:01:42,797 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:01:42,797 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:01:42,798 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:01:42,798 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:01:42,798 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:01:42,798 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:01:42,798 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:01:42,813 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-29 22:01:42,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:01:42,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:42,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:42,821 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:42,828 INFO L82 PathProgramCache]: Analyzing trace with hash -262159374, now seen corresponding path program 1 times [2020-11-29 22:01:42,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:42,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823483307] [2020-11-29 22:01:42,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:42,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823483307] [2020-11-29 22:01:42,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:01:42,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:01:42,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523881143] [2020-11-29 22:01:43,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:01:43,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:01:43,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:01:43,022 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-11-29 22:01:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:43,044 INFO L93 Difference]: Finished difference Result 53 states and 78 transitions. [2020-11-29 22:01:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:01:43,045 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-29 22:01:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:43,057 INFO L225 Difference]: With dead ends: 53 [2020-11-29 22:01:43,057 INFO L226 Difference]: Without dead ends: 26 [2020-11-29 22:01:43,069 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 [2020-11-29 22:01:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-29 22:01:43,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-29 22:01:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-29 22:01:43,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2020-11-29 22:01:43,109 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 14 [2020-11-29 22:01:43,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:43,109 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2020-11-29 22:01:43,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:01:43,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2020-11-29 22:01:43,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 22:01:43,111 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:43,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:43,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:01:43,111 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:43,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:43,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1209208016, now seen corresponding path program 1 times [2020-11-29 22:01:43,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:43,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579657473] [2020-11-29 22:01:43,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:43,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579657473] [2020-11-29 22:01:43,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:01:43,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:01:43,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065954123] [2020-11-29 22:01:43,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:01:43,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:43,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:01:43,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:01:43,227 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 3 states. [2020-11-29 22:01:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:43,270 INFO L93 Difference]: Finished difference Result 50 states and 68 transitions. [2020-11-29 22:01:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:01:43,272 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-11-29 22:01:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:43,273 INFO L225 Difference]: With dead ends: 50 [2020-11-29 22:01:43,273 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 22:01:43,274 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 [2020-11-29 22:01:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 22:01:43,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-11-29 22:01:43,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 22:01:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-11-29 22:01:43,283 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2020-11-29 22:01:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:43,283 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-11-29 22:01:43,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:01:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-11-29 22:01:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:01:43,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:43,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:43,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:01:43,287 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1891099105, now seen corresponding path program 1 times [2020-11-29 22:01:43,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:43,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267653730] [2020-11-29 22:01:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:43,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267653730] [2020-11-29 22:01:43,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:01:43,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:01:43,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143144056] [2020-11-29 22:01:43,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:01:43,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:43,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:01:43,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:01:43,437 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 3 states. [2020-11-29 22:01:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:43,479 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-11-29 22:01:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:01:43,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-11-29 22:01:43,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:43,483 INFO L225 Difference]: With dead ends: 57 [2020-11-29 22:01:43,483 INFO L226 Difference]: Without dead ends: 33 [2020-11-29 22:01:43,484 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 [2020-11-29 22:01:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-29 22:01:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-29 22:01:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-29 22:01:43,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-11-29 22:01:43,491 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 21 [2020-11-29 22:01:43,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:43,491 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-11-29 22:01:43,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:01:43,492 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-11-29 22:01:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 22:01:43,494 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:43,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:43,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:01:43,494 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:43,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:43,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1392750941, now seen corresponding path program 1 times [2020-11-29 22:01:43,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:43,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43979540] [2020-11-29 22:01:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43979540] [2020-11-29 22:01:43,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065409272] [2020-11-29 22:01:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/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 [2020-11-29 22:01:43,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:43,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:01:43,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:01:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:43,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:01:43,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:01:43,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358260534] [2020-11-29 22:01:43,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:01:43,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:43,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:01:43,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:01:43,830 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 5 states. [2020-11-29 22:01:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:43,873 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2020-11-29 22:01:43,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:01:43,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-29 22:01:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:43,876 INFO L225 Difference]: With dead ends: 57 [2020-11-29 22:01:43,877 INFO L226 Difference]: Without dead ends: 40 [2020-11-29 22:01:43,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:01:43,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-29 22:01:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-11-29 22:01:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-29 22:01:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-11-29 22:01:43,882 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 21 [2020-11-29 22:01:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:43,882 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-11-29 22:01:43,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:01:43,885 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-11-29 22:01:43,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-29 22:01:43,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:43,886 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:44,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:44,101 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash -782990510, now seen corresponding path program 1 times [2020-11-29 22:01:44,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:44,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596232293] [2020-11-29 22:01:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596232293] [2020-11-29 22:01:44,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085139099] [2020-11-29 22:01:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:01:44,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:01:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:44,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:01:44,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 22:01:44,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243299079] [2020-11-29 22:01:44,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:01:44,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:44,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:01:44,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:01:44,302 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 6 states. [2020-11-29 22:01:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:44,369 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2020-11-29 22:01:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:01:44,377 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-11-29 22:01:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:44,378 INFO L225 Difference]: With dead ends: 64 [2020-11-29 22:01:44,378 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 22:01:44,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:01:44,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 22:01:44,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-11-29 22:01:44,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 22:01:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2020-11-29 22:01:44,383 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 28 [2020-11-29 22:01:44,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:44,383 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2020-11-29 22:01:44,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:01:44,384 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2020-11-29 22:01:44,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-29 22:01:44,385 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:44,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:44,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:44,601 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:44,602 INFO L82 PathProgramCache]: Analyzing trace with hash -651787331, now seen corresponding path program 2 times [2020-11-29 22:01:44,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:44,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268767884] [2020-11-29 22:01:44,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:44,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:44,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268767884] [2020-11-29 22:01:44,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649234665] [2020-11-29 22:01:44,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:44,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:01:44,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:01:44,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:01:44,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:01:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:44,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:01:44,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:01:44,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064442330] [2020-11-29 22:01:44,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:01:44,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:01:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:01:44,905 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states. [2020-11-29 22:01:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:44,956 INFO L93 Difference]: Finished difference Result 71 states and 94 transitions. [2020-11-29 22:01:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:01:44,961 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-11-29 22:01:44,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:44,962 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:01:44,963 INFO L226 Difference]: Without dead ends: 54 [2020-11-29 22:01:44,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:01:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-29 22:01:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-11-29 22:01:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:01:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2020-11-29 22:01:44,971 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 35 [2020-11-29 22:01:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:44,971 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2020-11-29 22:01:44,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:01:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2020-11-29 22:01:44,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-29 22:01:44,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:44,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:45,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:45,180 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:45,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:45,180 INFO L82 PathProgramCache]: Analyzing trace with hash 741491954, now seen corresponding path program 3 times [2020-11-29 22:01:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:45,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229797] [2020-11-29 22:01:45,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:01:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229797] [2020-11-29 22:01:45,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516100682] [2020-11-29 22:01:45,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:47,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 22:01:47,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:01:47,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 22:01:47,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:01:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,806 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2020-11-29 22:01:47,807 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,819 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,819 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,820 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:23 [2020-11-29 22:01:47,862 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_18|], 10=[|v_#memory_int_20|]} [2020-11-29 22:01:47,868 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:01:47,888 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,913 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,913 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 41 [2020-11-29 22:01:47,915 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,929 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,933 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,933 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:66, output treesize:23 [2020-11-29 22:01:47,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-29 22:01:47,967 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,967 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 1 case distinctions, treesize of input 36 treesize of output 23 [2020-11-29 22:01:47,968 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:47,983 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:47,983 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:20 [2020-11-29 22:01:48,123 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:01:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-29 22:01:48,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:01:48,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2020-11-29 22:01:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456814519] [2020-11-29 22:01:48,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-29 22:01:48,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-29 22:01:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2020-11-29 22:01:48,179 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 16 states. [2020-11-29 22:01:49,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:49,293 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2020-11-29 22:01:49,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 22:01:49,294 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-11-29 22:01:49,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:49,295 INFO L225 Difference]: With dead ends: 87 [2020-11-29 22:01:49,295 INFO L226 Difference]: Without dead ends: 70 [2020-11-29 22:01:49,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2020-11-29 22:01:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-29 22:01:49,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2020-11-29 22:01:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 22:01:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2020-11-29 22:01:49,304 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 42 [2020-11-29 22:01:49,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:49,305 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-11-29 22:01:49,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-29 22:01:49,305 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2020-11-29 22:01:49,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 22:01:49,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:49,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:49,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:49,521 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:49,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:49,522 INFO L82 PathProgramCache]: Analyzing trace with hash 352724127, now seen corresponding path program 1 times [2020-11-29 22:01:49,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:49,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904756610] [2020-11-29 22:01:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:49,937 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-29 22:01:49,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904756610] [2020-11-29 22:01:49,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747029806] [2020-11-29 22:01:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:01:50,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-29 22:01:50,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:01:50,130 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 [2020-11-29 22:01:50,130 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,190 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,190 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,190 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-29 22:01:50,234 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,234 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2020-11-29 22:01:50,235 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,239 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,239 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:4 [2020-11-29 22:01:50,312 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-11-29 22:01:50,312 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2020-11-29 22:01:50,313 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,321 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,321 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,321 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:21 [2020-11-29 22:01:50,359 INFO L441 ElimStorePlain]: Different costs {2=[|v_#memory_int_22|], 10=[|v_#memory_int_24|]} [2020-11-29 22:01:50,365 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-29 22:01:50,394 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,505 INFO L350 Elim1Store]: treesize reduction 288, result has 10.8 percent of original size [2020-11-29 22:01:50,505 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 41 [2020-11-29 22:01:50,506 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,520 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,522 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,523 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:21 [2020-11-29 22:01:50,542 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-11-29 22:01:50,543 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2020-11-29 22:01:50,544 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,551 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-29 22:01:50,552 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-29 22:01:50,553 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:17 [2020-11-29 22:01:50,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 22:01:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-11-29 22:01:50,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:01:50,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2020-11-29 22:01:50,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265336892] [2020-11-29 22:01:50,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-29 22:01:50,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:01:50,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 22:01:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-11-29 22:01:50,730 INFO L87 Difference]: Start difference. First operand 58 states and 75 transitions. Second operand 18 states. [2020-11-29 22:01:52,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:01:52,126 INFO L93 Difference]: Finished difference Result 95 states and 124 transitions. [2020-11-29 22:01:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-29 22:01:52,128 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2020-11-29 22:01:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:01:52,129 INFO L225 Difference]: With dead ends: 95 [2020-11-29 22:01:52,129 INFO L226 Difference]: Without dead ends: 80 [2020-11-29 22:01:52,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2020-11-29 22:01:52,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-11-29 22:01:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2020-11-29 22:01:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 22:01:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-11-29 22:01:52,153 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 49 [2020-11-29 22:01:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:01:52,154 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-11-29 22:01:52,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-29 22:01:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-11-29 22:01:52,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-29 22:01:52,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:01:52,161 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:01:52,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:01:52,377 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:01:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:01:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash 354571169, now seen corresponding path program 1 times [2020-11-29 22:01:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:01:52,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750454695] [2020-11-29 22:01:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:01:52,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:01:52,456 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:01:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:01:52,566 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:01:52,622 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:01:52,622 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 22:01:52,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 22:01:52,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:01:52 BoogieIcfgContainer [2020-11-29 22:01:52,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:01:52,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:01:52,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:01:52,690 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:01:52,691 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:01:42" (3/4) ... [2020-11-29 22:01:52,693 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 22:01:52,783 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_98fd2f5f-40bc-4608-bef2-6ed4fc0e2790/bin/uautomizer/witness.graphml [2020-11-29 22:01:52,783 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:01:52,784 INFO L168 Benchmark]: Toolchain (without parser) took 11381.93 ms. Allocated memory was 79.7 MB in the beginning and 125.8 MB in the end (delta: 46.1 MB). Free memory was 43.8 MB in the beginning and 80.3 MB in the end (delta: -36.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,784 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory was 61.2 MB in the beginning and 61.1 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:01:52,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 618.98 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 43.6 MB in the beginning and 66.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,785 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.98 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 64.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,786 INFO L168 Benchmark]: Boogie Preprocessor took 33.88 ms. Allocated memory is still 104.9 MB. Free memory was 64.8 MB in the beginning and 63.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,786 INFO L168 Benchmark]: RCFGBuilder took 587.89 ms. Allocated memory is still 104.9 MB. Free memory was 63.0 MB in the beginning and 41.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,787 INFO L168 Benchmark]: TraceAbstraction took 9986.15 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 41.4 MB in the beginning and 85.5 MB in the end (delta: -44.1 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,788 INFO L168 Benchmark]: Witness Printer took 93.18 ms. Allocated memory is still 125.8 MB. Free memory was 85.5 MB in the beginning and 80.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:01:52,791 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 79.7 MB. Free memory was 61.2 MB in the beginning and 61.1 MB in the end (delta: 52.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 618.98 ms. Allocated memory was 79.7 MB in the beginning and 104.9 MB in the end (delta: 25.2 MB). Free memory was 43.6 MB in the beginning and 66.8 MB in the end (delta: -23.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.98 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 64.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.88 ms. Allocated memory is still 104.9 MB. Free memory was 64.8 MB in the beginning and 63.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 587.89 ms. Allocated memory is still 104.9 MB. Free memory was 63.0 MB in the beginning and 41.7 MB in the end (delta: 21.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9986.15 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 41.4 MB in the beginning and 85.5 MB in the end (delta: -44.1 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. * Witness Printer took 93.18 ms. Allocated memory is still 125.8 MB. Free memory was 85.5 MB in the beginning and 80.3 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "dll_nullified-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.8s, OverallIterations: 9, TraceHistogramMax: 5, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 825 SDslu, 564 SDs, 0 SdLazy, 611 SolverSat, 179 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 251 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=8, 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, 8 MinimizatonAttempts, 57 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 448 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 48285 SizeOfPredicates, 43 NumberOfNonLiveVariables, 872 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 176/311 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...