./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6a10fd260c2f708e346588150444ddfe9656de05 ...................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.25-f470102 [2019-12-07 14:45:51,210 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:45:51,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:45:51,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:45:51,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:45:51,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:45:51,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:45:51,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:45:51,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:45:51,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:45:51,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:45:51,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:45:51,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:45:51,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:45:51,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:45:51,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:45:51,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:45:51,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:45:51,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:45:51,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:45:51,233 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:45:51,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:45:51,234 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:45:51,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:45:51,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:45:51,236 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:45:51,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:45:51,237 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:45:51,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:45:51,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:45:51,238 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:45:51,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:45:51,239 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:45:51,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:45:51,240 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:45:51,240 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:45:51,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:45:51,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:45:51,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:45:51,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:45:51,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:45:51,242 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-12-07 14:45:51,251 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:45:51,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:45:51,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:45:51,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 14:45:51,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:45:51,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-07 14:45:51,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:45:51,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:45:51,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 14:45:51,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 14:45:51,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 14:45:51,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:45:51,256 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_45c6d403-75b7-4885-8bd9-1580f24f5a78/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(__VERIFIER_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 -> 6a10fd260c2f708e346588150444ddfe9656de05 [2019-12-07 14:45:51,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:45:51,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:45:51,366 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:45:51,367 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:45:51,367 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:45:51,368 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/../../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-12-07 14:45:51,404 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/data/2fc39b331/bb98cb98400243dd90a2be1720695e23/FLAG4418a85ff [2019-12-07 14:45:51,865 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:45:51,866 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-12-07 14:45:51,874 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/data/2fc39b331/bb98cb98400243dd90a2be1720695e23/FLAG4418a85ff [2019-12-07 14:45:52,388 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/data/2fc39b331/bb98cb98400243dd90a2be1720695e23 [2019-12-07 14:45:52,390 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:45:52,391 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:45:52,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:45:52,392 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:45:52,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:45:52,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4451cd62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52, skipping insertion in model container [2019-12-07 14:45:52,396 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:45:52,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:45:52,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:45:52,639 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:45:52,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:45:52,702 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:45:52,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52 WrapperNode [2019-12-07 14:45:52,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:45:52,703 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:45:52,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:45:52,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:45:52,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:45:52,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:45:52,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:45:52,737 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:45:52,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,746 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... [2019-12-07 14:45:52,761 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:45:52,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:45:52,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:45:52,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:45:52,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/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 [2019-12-07 14:45:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 14:45:52,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 14:45:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-07 14:45:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-07 14:45:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-07 14:45:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 14:45:52,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:45:52,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:45:53,067 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:45:53,067 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-12-07 14:45:53,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:45:53 BoogieIcfgContainer [2019-12-07 14:45:53,069 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:45:53,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 14:45:53,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 14:45:53,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 14:45:53,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 02:45:52" (1/3) ... [2019-12-07 14:45:53,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e390a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:45:53, skipping insertion in model container [2019-12-07 14:45:53,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:45:52" (2/3) ... [2019-12-07 14:45:53,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e390a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 02:45:53, skipping insertion in model container [2019-12-07 14:45:53,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:45:53" (3/3) ... [2019-12-07 14:45:53,075 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2019-12-07 14:45:53,084 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 14:45:53,090 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-12-07 14:45:53,100 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-12-07 14:45:53,117 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 14:45:53,117 INFO L374 AbstractCegarLoop]: Hoare is true [2019-12-07 14:45:53,117 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 14:45:53,117 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:45:53,117 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:45:53,117 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 14:45:53,117 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:45:53,117 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 14:45:53,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-12-07 14:45:53,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-12-07 14:45:53,131 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:45:53,132 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:45:53,132 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:45:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:45:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2019-12-07 14:45:53,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:45:53,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017249726] [2019-12-07 14:45:53,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:45:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:45:53,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:45:53,231 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017249726] [2019-12-07 14:45:53,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:45:53,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 14:45:53,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571710661] [2019-12-07 14:45:53,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-12-07 14:45:53,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:45:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-12-07 14:45:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-12-07 14:45:53,245 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-12-07 14:45:53,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:45:53,258 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2019-12-07 14:45:53,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-12-07 14:45:53,259 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-12-07 14:45:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:45:53,264 INFO L225 Difference]: With dead ends: 64 [2019-12-07 14:45:53,265 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 14:45:53,267 INFO L630 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 [2019-12-07 14:45:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 14:45:53,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 14:45:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 14:45:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-12-07 14:45:53,290 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-12-07 14:45:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:45:53,291 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-12-07 14:45:53,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-12-07 14:45:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-12-07 14:45:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 14:45:53,292 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:45:53,292 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:45:53,292 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:45:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:45:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2019-12-07 14:45:53,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:45:53,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455793976] [2019-12-07 14:45:53,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:45:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:45:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:45:53,358 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455793976] [2019-12-07 14:45:53,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:45:53,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 14:45:53,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632166761] [2019-12-07 14:45:53,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 14:45:53,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:45:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 14:45:53,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-12-07 14:45:53,361 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-12-07 14:45:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:45:53,425 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-12-07 14:45:53,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-12-07 14:45:53,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-12-07 14:45:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:45:53,426 INFO L225 Difference]: With dead ends: 29 [2019-12-07 14:45:53,427 INFO L226 Difference]: Without dead ends: 27 [2019-12-07 14:45:53,427 INFO L630 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 [2019-12-07 14:45:53,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-12-07 14:45:53,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-12-07 14:45:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-12-07 14:45:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-12-07 14:45:53,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-12-07 14:45:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:45:53,432 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-12-07 14:45:53,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 14:45:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-12-07 14:45:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 14:45:53,433 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:45:53,433 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:45:53,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:45:53,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:45:53,433 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2019-12-07 14:45:53,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:45:53,434 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786875260] [2019-12-07 14:45:53,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:45:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:45:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:45:53,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786875260] [2019-12-07 14:45:53,522 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333538704] [2019-12-07 14:45:53,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/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 [2019-12-07 14:45:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:45:53,568 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2019-12-07 14:45:53,572 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:45:53,613 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 14:45:53,613 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,619 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:45:53,621 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-12-07 14:45:53,621 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,625 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:45:53,626 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,626 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-12-07 14:45:53,636 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 14:45:53,636 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,641 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:45:53,643 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-12-07 14:45:53,643 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,646 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-12-07 14:45:53,646 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-12-07 14:45:53,646 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-12-07 14:45:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:45:53,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:45:53,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-12-07 14:45:53,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803898560] [2019-12-07 14:45:53,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 14:45:53,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:45:53,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:45:53,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:45:53,649 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-12-07 14:45:53,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:45:53,701 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-12-07 14:45:53,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 14:45:53,701 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-12-07 14:45:53,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 14:45:53,702 INFO L225 Difference]: With dead ends: 33 [2019-12-07 14:45:53,702 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 14:45:53,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-12-07 14:45:53,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 14:45:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-12-07 14:45:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-12-07 14:45:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-12-07 14:45:53,704 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-12-07 14:45:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 14:45:53,705 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-12-07 14:45:53,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 14:45:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-12-07 14:45:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-12-07 14:45:53,705 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 14:45:53,706 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:45:53,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:45:53,906 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-12-07 14:45:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:45:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2019-12-07 14:45:53,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:45:53,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213007746] [2019-12-07 14:45:53,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:45:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:45:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:45:54,017 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:45:54,017 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 14:45:54,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 02:45:54 BoogieIcfgContainer [2019-12-07 14:45:54,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 14:45:54,041 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:45:54,041 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:45:54,041 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:45:54,042 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:45:53" (3/4) ... [2019-12-07 14:45:54,043 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 14:45:54,083 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_45c6d403-75b7-4885-8bd9-1580f24f5a78/bin/uautomizer/witness.graphml [2019-12-07 14:45:54,083 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:45:54,085 INFO L168 Benchmark]: Toolchain (without parser) took 1693.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 938.2 MB in the beginning and 963.8 MB in the end (delta: -25.6 MB). Peak memory consumption was 93.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,085 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:45:54,085 INFO L168 Benchmark]: CACSL2BoogieTranslator took 311.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,086 INFO L168 Benchmark]: Boogie Preprocessor took 24.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,087 INFO L168 Benchmark]: RCFGBuilder took 307.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,087 INFO L168 Benchmark]: TraceAbstraction took 971.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 965.9 MB in the end (delta: 89.1 MB). Peak memory consumption was 89.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,088 INFO L168 Benchmark]: Witness Printer took 42.59 ms. Allocated memory is still 1.1 GB. Free memory was 965.9 MB in the beginning and 963.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. [2019-12-07 14:45:54,090 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 957.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 311.04 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.0 MB). Free memory was 938.2 MB in the beginning and 1.1 GB in the end (delta: -158.3 MB). Peak memory consumption was 21.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.82 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.10 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 11.5 GB. * RCFGBuilder took 307.78 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 971.06 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 965.9 MB in the end (delta: 89.1 MB). Peak memory consumption was 89.1 MB. Max. memory is 11.5 GB. * Witness Printer took 42.59 ms. Allocated memory is still 1.1 GB. Free memory was 965.9 MB in the beginning and 963.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 30 SDslu, 48 SDs, 0 SdLazy, 58 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 7 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...