./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/forester-heap/dll-sorted_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/dll-sorted_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 3d1a973dcd7009ffcd2eda1338249f4d290fb62a ..................................................................................................................................................................................................................................................................................................................................................................... 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 [2019-01-14 15:51:56,022 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-14 15:51:56,023 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-14 15:51:56,035 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-14 15:51:56,035 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-14 15:51:56,036 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-14 15:51:56,037 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-14 15:51:56,039 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-14 15:51:56,041 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-14 15:51:56,042 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-14 15:51:56,042 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-14 15:51:56,043 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-14 15:51:56,044 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-14 15:51:56,045 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-14 15:51:56,046 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-14 15:51:56,046 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-14 15:51:56,047 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-14 15:51:56,049 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-14 15:51:56,052 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-14 15:51:56,053 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-14 15:51:56,054 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-14 15:51:56,055 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-14 15:51:56,058 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-14 15:51:56,058 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-14 15:51:56,058 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-14 15:51:56,059 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-14 15:51:56,060 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-14 15:51:56,061 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-14 15:51:56,062 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-14 15:51:56,063 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-14 15:51:56,064 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-14 15:51:56,064 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-14 15:51:56,065 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-14 15:51:56,065 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-14 15:51:56,066 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-14 15:51:56,067 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-14 15:51:56,067 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-14 15:51:56,088 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-14 15:51:56,088 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-14 15:51:56,089 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-14 15:51:56,090 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-14 15:51:56,090 INFO L133 SettingsManager]: * Use SBE=true [2019-01-14 15:51:56,090 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-14 15:51:56,090 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-14 15:51:56,090 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-14 15:51:56,091 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-14 15:51:56,092 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-14 15:51:56,092 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-14 15:51:56,092 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-14 15:51:56,092 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-14 15:51:56,092 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-14 15:51:56,093 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-14 15:51:56,093 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-14 15:51:56,093 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-14 15:51:56,093 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-14 15:51:56,093 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-14 15:51:56,093 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-14 15:51:56,094 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-14 15:51:56,094 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-14 15:51:56,094 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 -> 3d1a973dcd7009ffcd2eda1338249f4d290fb62a [2019-01-14 15:51:56,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-14 15:51:56,148 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-14 15:51:56,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-14 15:51:56,156 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-14 15:51:56,156 INFO L276 PluginConnector]: CDTParser initialized [2019-01-14 15:51:56,157 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/forester-heap/dll-sorted_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:51:56,226 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e99515a8/4038e0f045634f2196a29da392f92888/FLAGd289c5f9a [2019-01-14 15:51:56,769 INFO L307 CDTParser]: Found 1 translation units. [2019-01-14 15:51:56,770 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/forester-heap/dll-sorted_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:51:56,797 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e99515a8/4038e0f045634f2196a29da392f92888/FLAGd289c5f9a [2019-01-14 15:51:57,001 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e99515a8/4038e0f045634f2196a29da392f92888 [2019-01-14 15:51:57,005 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-14 15:51:57,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-14 15:51:57,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-14 15:51:57,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-14 15:51:57,012 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-14 15:51:57,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66cc1438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57, skipping insertion in model container [2019-01-14 15:51:57,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-14 15:51:57,077 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-14 15:51:57,436 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 15:51:57,449 INFO L191 MainTranslator]: Completed pre-run [2019-01-14 15:51:57,577 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-14 15:51:57,650 INFO L195 MainTranslator]: Completed translation [2019-01-14 15:51:57,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57 WrapperNode [2019-01-14 15:51:57,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-14 15:51:57,652 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-14 15:51:57,652 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-14 15:51:57,652 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-14 15:51:57,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-14 15:51:57,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-14 15:51:57,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-14 15:51:57,718 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-14 15:51:57,726 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,748 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (1/1) ... [2019-01-14 15:51:57,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-14 15:51:57,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-14 15:51:57,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-14 15:51:57,755 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-14 15:51:57,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (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 [2019-01-14 15:51:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-14 15:51:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-14 15:51:57,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-01-14 15:51:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-01-14 15:51:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-01-14 15:51:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-14 15:51:57,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-14 15:51:57,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-14 15:51:58,552 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-14 15:51:58,553 INFO L286 CfgBuilder]: Removed 22 assue(true) statements. [2019-01-14 15:51:58,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:51:58 BoogieIcfgContainer [2019-01-14 15:51:58,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-14 15:51:58,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-14 15:51:58,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-14 15:51:58,560 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-14 15:51:58,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.01 03:51:57" (1/3) ... [2019-01-14 15:51:58,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e98db92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 03:51:58, skipping insertion in model container [2019-01-14 15:51:58,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.01 03:51:57" (2/3) ... [2019-01-14 15:51:58,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e98db92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.01 03:51:58, skipping insertion in model container [2019-01-14 15:51:58,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:51:58" (3/3) ... [2019-01-14 15:51:58,565 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-sorted_false-unreach-call_false-valid-memcleanup.i [2019-01-14 15:51:58,577 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-14 15:51:58,588 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-01-14 15:51:58,608 INFO L257 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-01-14 15:51:58,650 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-14 15:51:58,651 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-14 15:51:58,651 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-14 15:51:58,652 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-14 15:51:58,653 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-14 15:51:58,653 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-14 15:51:58,653 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-14 15:51:58,653 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-14 15:51:58,653 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-14 15:51:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2019-01-14 15:51:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-01-14 15:51:58,692 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:51:58,693 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-01-14 15:51:58,696 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:51:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:51:58,703 INFO L82 PathProgramCache]: Analyzing trace with hash 890153286, now seen corresponding path program 1 times [2019-01-14 15:51:58,706 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:51:58,707 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:51:58,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:58,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:51:58,761 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:51:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:51:58,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 15:51:58,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-14 15:51:58,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-14 15:51:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-14 15:51:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-14 15:51:58,874 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2019-01-14 15:51:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:51:58,902 INFO L93 Difference]: Finished difference Result 106 states and 172 transitions. [2019-01-14 15:51:58,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-14 15:51:58,904 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-01-14 15:51:58,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:51:58,919 INFO L225 Difference]: With dead ends: 106 [2019-01-14 15:51:58,920 INFO L226 Difference]: Without dead ends: 50 [2019-01-14 15:51:58,924 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 [2019-01-14 15:51:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-01-14 15:51:58,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-01-14 15:51:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-01-14 15:51:58,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2019-01-14 15:51:58,971 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 6 [2019-01-14 15:51:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:51:58,971 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2019-01-14 15:51:58,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-14 15:51:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2019-01-14 15:51:58,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-01-14 15:51:58,973 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:51:58,973 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:51:58,973 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:51:58,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:51:58,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1806859191, now seen corresponding path program 1 times [2019-01-14 15:51:58,975 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:51:58,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:51:58,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:58,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:51:58,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:51:59,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-01-14 15:51:59,077 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 15:51:59,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-01-14 15:51:59,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-01-14 15:51:59,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-01-14 15:51:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-01-14 15:51:59,081 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 3 states. [2019-01-14 15:51:59,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:51:59,291 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2019-01-14 15:51:59,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-01-14 15:51:59,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-01-14 15:51:59,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:51:59,292 INFO L225 Difference]: With dead ends: 103 [2019-01-14 15:51:59,293 INFO L226 Difference]: Without dead ends: 55 [2019-01-14 15:51:59,294 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 [2019-01-14 15:51:59,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-01-14 15:51:59,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-01-14 15:51:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-01-14 15:51:59,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2019-01-14 15:51:59,302 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 7 [2019-01-14 15:51:59,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:51:59,302 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2019-01-14 15:51:59,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-01-14 15:51:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2019-01-14 15:51:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-01-14 15:51:59,303 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:51:59,303 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:51:59,304 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:51:59,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:51:59,304 INFO L82 PathProgramCache]: Analyzing trace with hash 443319948, now seen corresponding path program 1 times [2019-01-14 15:51:59,304 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:51:59,304 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:51:59,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:59,308 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:51:59,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-14 15:51:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-01-14 15:51:59,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-14 15:51:59,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-01-14 15:51:59,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-01-14 15:51:59,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-01-14 15:51:59,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-01-14 15:51:59,429 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 4 states. [2019-01-14 15:51:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-14 15:51:59,706 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2019-01-14 15:51:59,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-01-14 15:51:59,709 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-01-14 15:51:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-14 15:51:59,711 INFO L225 Difference]: With dead ends: 87 [2019-01-14 15:51:59,711 INFO L226 Difference]: Without dead ends: 85 [2019-01-14 15:51:59,712 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-01-14 15:51:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-01-14 15:51:59,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2019-01-14 15:51:59,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-01-14 15:51:59,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2019-01-14 15:51:59,721 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 11 [2019-01-14 15:51:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-14 15:51:59,722 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2019-01-14 15:51:59,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-01-14 15:51:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2019-01-14 15:51:59,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-01-14 15:51:59,723 INFO L394 BasicCegarLoop]: Found error trace [2019-01-14 15:51:59,724 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-14 15:51:59,725 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-14 15:51:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-14 15:51:59,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1236050174, now seen corresponding path program 1 times [2019-01-14 15:51:59,725 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-14 15:51:59,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-14 15:51:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:59,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-14 15:51:59,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-14 15:51:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 15:51:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-14 15:51:59,886 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-14 15:51:59,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.01 03:51:59 BoogieIcfgContainer [2019-01-14 15:51:59,925 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-14 15:51:59,925 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-14 15:51:59,925 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-14 15:51:59,925 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-14 15:51:59,926 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.01 03:51:58" (3/4) ... [2019-01-14 15:51:59,928 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-14 15:51:59,989 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-14 15:51:59,990 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-14 15:51:59,991 INFO L168 Benchmark]: Toolchain (without parser) took 2984.80 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 936.6 MB in the beginning and 998.1 MB in the end (delta: -61.5 MB). Peak memory consumption was 51.2 MB. Max. memory is 11.5 GB. [2019-01-14 15:51:59,993 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:51:59,994 INFO L168 Benchmark]: CACSL2BoogieTranslator took 643.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -155.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2019-01-14 15:51:59,995 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.15 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:51:59,995 INFO L168 Benchmark]: Boogie Preprocessor took 38.31 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-01-14 15:51:59,997 INFO L168 Benchmark]: RCFGBuilder took 799.43 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: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. [2019-01-14 15:51:59,997 INFO L168 Benchmark]: TraceAbstraction took 1368.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.1 MB in the end (delta: 54.8 MB). Peak memory consumption was 54.8 MB. Max. memory is 11.5 GB. [2019-01-14 15:51:59,999 INFO L168 Benchmark]: Witness Printer took 64.61 ms. Allocated memory is still 1.1 GB. Free memory is still 998.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-01-14 15:52:00,003 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 972.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 643.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.7 MB). Free memory was 936.6 MB in the beginning and 1.1 GB in the end (delta: -155.1 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 64.15 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 38.31 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 799.43 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: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1368.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 998.1 MB in the end (delta: 54.8 MB). Peak memory consumption was 54.8 MB. Max. memory is 11.5 GB. * Witness Printer took 64.61 ms. Allocated memory is still 1.1 GB. Free memory is still 998.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1027]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = ((void*)0) [L988] head->prev = ((void*)0) [L989] head->data = 0 [L991] SLL* x = head; [L992] int marked = 0; [L995] COND TRUE __VERIFIER_nondet_int() || !marked [L998] x->next = malloc(sizeof(SLL)) [L999] EXPR x->next [L999] x->next->prev = x [L1000] EXPR x->next [L1000] x = x->next [L1001] x->next = ((void*)0) [L1003] COND TRUE __VERIFIER_nondet_int() [L1005] marked = 1 [L1008] COND TRUE \read(marked) [L1009] x->data = 1 [L995] COND FALSE !(__VERIFIER_nondet_int() || !marked) [L1014] x = head [L1016] COND FALSE !(!(((void*)0) != x)) [L1017] marked = 0 [L1019] EXPR x->next [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] EXPR x->next [L1019] EXPR x->next->data [L1019] x->next != ((void*)0) && x->next->data == 0 [L1019] COND FALSE !(x->next != ((void*)0) && x->next->data == 0) [L1024] EXPR x->next [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] x->next != ((void*)0) && __VERIFIER_nondet_int() [L1024] COND TRUE x->next != ((void*)0) && __VERIFIER_nondet_int() [L1026] EXPR x->next [L1026] x = x->next [L1027] EXPR x->data [L1027] COND TRUE !(x->data != 1) [L1027] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 6 error locations. UNSAFE Result, 1.2s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 161 SDtfs, 156 SDslu, 51 SDs, 0 SdLazy, 50 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s 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=56occurred in iteration=0, 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, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 425 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...