./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/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 ../sv-benchmarks/c/forester-heap/sll-circular-2.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 0.1.25-f470102 [2019-11-28 16:59:04,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:59:04,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:59:04,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:59:04,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:59:04,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:59:04,857 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:59:04,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:59:04,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:59:04,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:59:04,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:59:04,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:59:04,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:59:04,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:59:04,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:59:04,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:59:04,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:59:04,894 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:59:04,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:59:04,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:59:04,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:59:04,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:59:04,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:59:04,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:59:04,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:59:04,919 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:59:04,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:59:04,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:59:04,922 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:59:04,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:59:04,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:59:04,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:59:04,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:59:04,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:59:04,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:59:04,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:59:04,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:59:04,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:59:04,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:59:04,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:59:04,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:59:04,935 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:59:04,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:59:04,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:59:04,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:59:04,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:59:04,979 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:59:04,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:59:04,980 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:59:04,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:59:04,980 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:59:04,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:59:04,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:59:04,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:59:04,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:59:04,984 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:59:04,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:59:04,985 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:59:04,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:59:04,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:59:04,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:59:04,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:59:04,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:59:04,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:59:04,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:59:04,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:59:04,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:59:04,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:59:04,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:59:04,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:59:04,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:59:04,992 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 -> /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 [2019-11-28 16:59:05,329 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:59:05,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:59:05,348 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:59:05,349 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:59:05,350 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:59:05,351 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-circular-2.i [2019-11-28 16:59:05,415 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6d7add1/7fef5e82beff467180174a73a8c65db1/FLAG754565427 [2019-11-28 16:59:05,921 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:59:05,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i [2019-11-28 16:59:05,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6d7add1/7fef5e82beff467180174a73a8c65db1/FLAG754565427 [2019-11-28 16:59:06,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e6d7add1/7fef5e82beff467180174a73a8c65db1 [2019-11-28 16:59:06,290 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:59:06,292 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:59:06,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:06,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:59:06,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:59:06,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:06" (1/1) ... [2019-11-28 16:59:06,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5399f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:06, skipping insertion in model container [2019-11-28 16:59:06,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:06" (1/1) ... [2019-11-28 16:59:06,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:59:06,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:59:06,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:06,931 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:59:07,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:07,071 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:59:07,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07 WrapperNode [2019-11-28 16:59:07,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:07,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:07,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:59:07,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:59:07,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:07,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:59:07,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:59:07,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:59:07,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (1/1) ... [2019-11-28 16:59:07,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:59:07,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:59:07,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:59:07,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:59:07,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (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 [2019-11-28 16:59:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:59:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:59:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:59:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:59:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:59:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:59:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:59:07,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:59:07,633 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:59:07,634 INFO L287 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-28 16:59:07,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:07 BoogieIcfgContainer [2019-11-28 16:59:07,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:59:07,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:59:07,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:59:07,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:59:07,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:59:06" (1/3) ... [2019-11-28 16:59:07,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780384d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:07, skipping insertion in model container [2019-11-28 16:59:07,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:07" (2/3) ... [2019-11-28 16:59:07,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@780384d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:07, skipping insertion in model container [2019-11-28 16:59:07,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:07" (3/3) ... [2019-11-28 16:59:07,644 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2019-11-28 16:59:07,654 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:59:07,662 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-28 16:59:07,675 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-28 16:59:07,700 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:59:07,700 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:59:07,700 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:59:07,701 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:59:07,701 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:59:07,701 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:59:07,702 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:59:07,702 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:59:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-28 16:59:07,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-28 16:59:07,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:07,726 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-28 16:59:07,727 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2019-11-28 16:59:07,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:07,743 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446768788] [2019-11-28 16:59:07,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:07,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446768788] [2019-11-28 16:59:07,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:07,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:59:07,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131008995] [2019-11-28 16:59:07,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:59:07,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:07,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:59:07,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:59:07,893 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-28 16:59:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:07,916 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2019-11-28 16:59:07,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:59:07,917 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-28 16:59:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:07,924 INFO L225 Difference]: With dead ends: 64 [2019-11-28 16:59:07,924 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 16:59:07,927 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 [2019-11-28 16:59:07,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 16:59:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 16:59:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 16:59:07,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-28 16:59:07,956 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2019-11-28 16:59:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:07,957 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-28 16:59:07,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:59:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-28 16:59:07,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 16:59:07,958 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:07,958 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:07,958 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:07,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2019-11-28 16:59:07,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:07,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615699647] [2019-11-28 16:59:07,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:08,123 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615699647] [2019-11-28 16:59:08,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:08,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 16:59:08,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347751348] [2019-11-28 16:59:08,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 16:59:08,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:08,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 16:59:08,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 16:59:08,128 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-28 16:59:08,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:08,244 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-28 16:59:08,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-28 16:59:08,245 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 16:59:08,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:08,246 INFO L225 Difference]: With dead ends: 42 [2019-11-28 16:59:08,246 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 16:59:08,248 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:59:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 16:59:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2019-11-28 16:59:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 16:59:08,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-28 16:59:08,255 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2019-11-28 16:59:08,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:08,256 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-28 16:59:08,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 16:59:08,256 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-28 16:59:08,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:59:08,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:08,257 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:08,258 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:08,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:08,258 INFO L82 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2019-11-28 16:59:08,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:08,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473435081] [2019-11-28 16:59:08,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:08,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473435081] [2019-11-28 16:59:08,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:08,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 16:59:08,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010806473] [2019-11-28 16:59:08,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 16:59:08,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 16:59:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 16:59:08,337 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-11-28 16:59:08,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:08,368 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-28 16:59:08,369 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 16:59:08,369 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-28 16:59:08,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:08,372 INFO L225 Difference]: With dead ends: 71 [2019-11-28 16:59:08,372 INFO L226 Difference]: Without dead ends: 49 [2019-11-28 16:59:08,373 INFO L630 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 [2019-11-28 16:59:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-28 16:59:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-28 16:59:08,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 16:59:08,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-28 16:59:08,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2019-11-28 16:59:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:08,381 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-28 16:59:08,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 16:59:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-28 16:59:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 16:59:08,383 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:08,383 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:08,383 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:08,384 INFO L82 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2019-11-28 16:59:08,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:08,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661676812] [2019-11-28 16:59:08,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:08,466 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:59:08,466 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:59:08,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:59:08 BoogieIcfgContainer [2019-11-28 16:59:08,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:59:08,497 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:59:08,497 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:59:08,497 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:59:08,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:07" (3/4) ... [2019-11-28 16:59:08,500 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:59:08,546 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:59:08,546 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:59:08,549 INFO L168 Benchmark]: Toolchain (without parser) took 2255.77 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 957.7 MB in the beginning and 1.0 GB in the end (delta: -72.0 MB). Peak memory consumption was 60.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:08,549 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:08,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 778.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:08,551 INFO L168 Benchmark]: Boogie Procedure Inliner took 73.73 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. [2019-11-28 16:59:08,552 INFO L168 Benchmark]: Boogie Preprocessor took 35.91 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. [2019-11-28 16:59:08,553 INFO L168 Benchmark]: RCFGBuilder took 451.97 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: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:08,554 INFO L168 Benchmark]: TraceAbstraction took 860.43 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: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:08,554 INFO L168 Benchmark]: Witness Printer took 49.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:08,559 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 778.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.1 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -162.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 73.73 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. * Boogie Preprocessor took 35.91 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. * RCFGBuilder took 451.97 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: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 860.43 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: 47.1 MB). Peak memory consumption was 47.1 MB. Max. memory is 11.5 GB. * Witness Printer took 49.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. 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. Result: UNSAFE, OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 44 SDslu, 49 SDs, 0 SdLazy, 35 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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 DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s 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, 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...