./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/forester-heap/sll-circular_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0ed9222f Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/svcomp/c/forester-heap/sll-circular_false-unreach-call_false-valid-memcleanup.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 b651d63eb42259dfd3a213a6671e4c58ee528ad0 ........................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-0ed9222-m [2019-01-12 09:35:41,968 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 09:35:41,970 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 09:35:41,981 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 09:35:41,982 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 09:35:41,983 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 09:35:41,984 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 09:35:41,986 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 09:35:41,988 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 09:35:41,988 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 09:35:41,989 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 09:35:41,990 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 09:35:41,990 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 09:35:41,991 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 09:35:41,993 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 09:35:41,993 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 09:35:41,994 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 09:35:41,996 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 09:35:41,998 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 09:35:42,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 09:35:42,001 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 09:35:42,002 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 09:35:42,004 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 09:35:42,005 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 09:35:42,005 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 09:35:42,006 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 09:35:42,007 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 09:35:42,008 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 09:35:42,008 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 09:35:42,010 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 09:35:42,010 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 09:35:42,011 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 09:35:42,011 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 09:35:42,011 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 09:35:42,012 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 09:35:42,013 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 09:35:42,013 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 09:35:42,030 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 09:35:42,030 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 09:35:42,032 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 09:35:42,032 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 09:35:42,033 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 09:35:42,033 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 09:35:42,033 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 09:35:42,033 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 09:35:42,033 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 09:35:42,033 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 09:35:42,034 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 09:35:42,035 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 09:35:42,036 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 09:35:42,036 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 09:35:42,036 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 09:35:42,037 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 09:35:42,037 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 09:35:42,037 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 09:35:42,037 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 09:35:42,037 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 09:35:42,037 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 09:35:42,038 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 09:35:42,039 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 09:35:42,039 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> b651d63eb42259dfd3a213a6671e4c58ee528ad0 [2019-01-12 09:35:42,082 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 09:35:42,101 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 09:35:42,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 09:35:42,109 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 09:35:42,109 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 09:35:42,110 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/forester-heap/sll-circular_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:35:42,171 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4149f83/b874a2e11f124cb7abea052927053627/FLAGb33f4a355 [2019-01-12 09:35:42,724 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 09:35:42,725 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/forester-heap/sll-circular_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:35:42,738 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4149f83/b874a2e11f124cb7abea052927053627/FLAGb33f4a355 [2019-01-12 09:35:43,138 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c4149f83/b874a2e11f124cb7abea052927053627 [2019-01-12 09:35:43,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 09:35:43,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 09:35:43,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 09:35:43,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 09:35:43,149 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 09:35:43,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49ff45a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43, skipping insertion in model container [2019-01-12 09:35:43,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 09:35:43,214 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 09:35:43,584 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:35:43,595 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 09:35:43,710 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:35:43,763 INFO L195 MainTranslator]: Completed translation [2019-01-12 09:35:43,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43 WrapperNode [2019-01-12 09:35:43,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 09:35:43,765 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 09:35:43,765 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 09:35:43,766 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 09:35:43,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,823 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 09:35:43,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 09:35:43,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 09:35:43,824 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 09:35:43,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,858 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,868 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... [2019-01-12 09:35:43,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 09:35:43,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 09:35:43,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 09:35:43,874 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 09:35:43,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-01-12 09:35:43,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-12 09:35:43,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 09:35:43,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 09:35:44,531 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 09:35:44,531 INFO L286 CfgBuilder]: Removed 13 assue(true) statements. [2019-01-12 09:35:44,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:35:44 BoogieIcfgContainer [2019-01-12 09:35:44,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 09:35:44,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 09:35:44,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 09:35:44,536 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 09:35:44,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 09:35:43" (1/3) ... [2019-01-12 09:35:44,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459171e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:35:44, skipping insertion in model container [2019-01-12 09:35:44,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:35:43" (2/3) ... [2019-01-12 09:35:44,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@459171e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:35:44, skipping insertion in model container [2019-01-12 09:35:44,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:35:44" (3/3) ... [2019-01-12 09:35:44,540 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-circular_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:35:44,549 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 09:35:44,556 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-01-12 09:35:44,573 INFO L257 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-01-12 09:35:44,604 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 09:35:44,605 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 09:35:44,605 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 09:35:44,605 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 09:35:44,605 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 09:35:44,605 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 09:35:44,606 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 09:35:44,606 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 09:35:44,606 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 09:35:44,622 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-01-12 09:35:44,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-12 09:35:44,628 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:35:44,629 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-12 09:35:44,631 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:35:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:35:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2019-01-12 09:35:44,639 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:35:44,640 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:35:44,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:44,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:35:44,689 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:35:44,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:35:44,777 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:35:44,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-12 09:35:44,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-12 09:35:44,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-12 09:35:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-12 09:35:44,794 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-01-12 09:35:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:35:44,812 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2019-01-12 09:35:44,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-12 09:35:44,813 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-01-12 09:35:44,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:35:44,822 INFO L225 Difference]: With dead ends: 64 [2019-01-12 09:35:44,822 INFO L226 Difference]: Without dead ends: 26 [2019-01-12 09:35:44,825 INFO L631 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 [2019-01-12 09:35:44,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-01-12 09:35:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-01-12 09:35:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-01-12 09:35:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-01-12 09:35:44,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2019-01-12 09:35:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:35:44,855 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-01-12 09:35:44,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-12 09:35:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-01-12 09:35:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-12 09:35:44,856 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:35:44,856 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:35:44,856 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:35:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:35:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2019-01-12 09:35:44,857 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:35:44,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:35:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:44,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:35:44,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:35:45,159 WARN L181 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2019-01-12 09:35:45,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:35:45,181 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:35:45,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-01-12 09:35:45,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-12 09:35:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-12 09:35:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-12 09:35:45,186 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-01-12 09:35:45,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:35:45,413 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-01-12 09:35:45,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-12 09:35:45,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-01-12 09:35:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:35:45,415 INFO L225 Difference]: With dead ends: 42 [2019-01-12 09:35:45,415 INFO L226 Difference]: Without dead ends: 38 [2019-01-12 09:35:45,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-12 09:35:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-01-12 09:35:45,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2019-01-12 09:35:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-01-12 09:35:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-01-12 09:35:45,422 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2019-01-12 09:35:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:35:45,423 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-01-12 09:35:45,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-12 09:35:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-01-12 09:35:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-01-12 09:35:45,424 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:35:45,424 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:35:45,424 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:35:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:35:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2019-01-12 09:35:45,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:35:45,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:35:45,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:45,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:35:45,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:35:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-12 09:35:45,486 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:35:45,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-12 09:35:45,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-12 09:35:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-12 09:35:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-12 09:35:45,488 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-01-12 09:35:45,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:35:45,527 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-01-12 09:35:45,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-12 09:35:45,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-01-12 09:35:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:35:45,531 INFO L225 Difference]: With dead ends: 71 [2019-01-12 09:35:45,532 INFO L226 Difference]: Without dead ends: 49 [2019-01-12 09:35:45,533 INFO L631 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 [2019-01-12 09:35:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-01-12 09:35:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-01-12 09:35:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-01-12 09:35:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-01-12 09:35:45,540 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2019-01-12 09:35:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:35:45,540 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-01-12 09:35:45,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-12 09:35:45,541 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-01-12 09:35:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-01-12 09:35:45,541 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:35:45,542 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:35:45,542 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:35:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:35:45,542 INFO L82 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2019-01-12 09:35:45,543 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:35:45,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:35:45,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:45,545 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:35:45,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:35:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:35:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:35:45,615 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 09:35:45,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 09:35:45 BoogieIcfgContainer [2019-01-12 09:35:45,648 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 09:35:45,648 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 09:35:45,648 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 09:35:45,649 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 09:35:45,649 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:35:44" (3/4) ... [2019-01-12 09:35:45,651 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 09:35:45,697 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 09:35:45,698 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 09:35:45,699 INFO L168 Benchmark]: Toolchain (without parser) took 2555.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 952.7 MB in the beginning and 1.0 GB in the end (delta: -74.8 MB). Peak memory consumption was 50.0 MB. Max. memory is 11.5 GB. [2019-01-12 09:35:45,700 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:35:45,701 INFO L168 Benchmark]: CACSL2BoogieTranslator took 619.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -159.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. [2019-01-12 09:35:45,702 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:35:45,703 INFO L168 Benchmark]: Boogie Preprocessor took 49.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-01-12 09:35:45,704 INFO L168 Benchmark]: RCFGBuilder took 659.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-01-12 09:35:45,704 INFO L168 Benchmark]: TraceAbstraction took 1114.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. [2019-01-12 09:35:45,706 INFO L168 Benchmark]: Witness Printer took 49.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-12 09:35:45,711 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 619.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 124.8 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -159.0 MB). Peak memory consumption was 25.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 58.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 49.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 659.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1114.70 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 53.4 MB). Peak memory consumption was 53.4 MB. Max. memory is 11.5 GB. * Witness Printer took 49.45 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1021]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = head [L987] head->data = 0 [L989] SLL* x = head; [L990] int state = 1; [L993] COND FALSE !(__VERIFIER_nondet_int()) [L1014] x->data = state [L1016] EXPR head->next [L1016] x = head->next [L1017] COND FALSE !(!(((void*)0) != x)) [L1019] EXPR x->data [L1019] COND TRUE x->data != 0 [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] EXPR x->data [L1021] EXPR x->next [L1021] EXPR x->next->data [L1021] EXPR x->next->data != 0 && x->data > x->next->data [L1021] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1021] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 3 error locations. UNSAFE Result, 1.0s OverallTime, 4 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 44 SDslu, 49 SDs, 0 SdLazy, 35 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 538 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...