./Ultimate.py --spec /storage/repos/svcomp/c/properties/unreach-call.prp --file /storage/repos/svcomp/c/list-properties/alternating_list_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/list-properties/alternating_list_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 a74485b04ec8988328f8bc8f67ebe898d81e7141 ....................................................................................................................................................................................................................................................................................................................... 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 09:19:09,062 INFO L170 SettingsManager]: Resetting all preferences to default values... [2019-01-12 09:19:09,063 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2019-01-12 09:19:09,076 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-01-12 09:19:09,076 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-01-12 09:19:09,077 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-01-12 09:19:09,078 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-01-12 09:19:09,081 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2019-01-12 09:19:09,083 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-01-12 09:19:09,084 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-01-12 09:19:09,085 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-01-12 09:19:09,085 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-01-12 09:19:09,086 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-01-12 09:19:09,087 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-01-12 09:19:09,089 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-01-12 09:19:09,090 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-01-12 09:19:09,090 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-01-12 09:19:09,092 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-01-12 09:19:09,095 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2019-01-12 09:19:09,096 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-01-12 09:19:09,097 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-01-12 09:19:09,099 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-01-12 09:19:09,101 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-01-12 09:19:09,101 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-01-12 09:19:09,102 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-01-12 09:19:09,103 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-01-12 09:19:09,104 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-01-12 09:19:09,104 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-01-12 09:19:09,105 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2019-01-12 09:19:09,106 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-01-12 09:19:09,107 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2019-01-12 09:19:09,107 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-01-12 09:19:09,108 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-01-12 09:19:09,108 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2019-01-12 09:19:09,109 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2019-01-12 09:19:09,110 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2019-01-12 09:19:09,110 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-01-12 09:19:09,126 INFO L110 SettingsManager]: Loading preferences was successful [2019-01-12 09:19:09,127 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2019-01-12 09:19:09,128 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-01-12 09:19:09,128 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2019-01-12 09:19:09,129 INFO L133 SettingsManager]: * Use SBE=true [2019-01-12 09:19:09,129 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-01-12 09:19:09,129 INFO L133 SettingsManager]: * sizeof long=4 [2019-01-12 09:19:09,129 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2019-01-12 09:19:09,130 INFO L133 SettingsManager]: * sizeof POINTER=4 [2019-01-12 09:19:09,130 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2019-01-12 09:19:09,130 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-01-12 09:19:09,130 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-01-12 09:19:09,130 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-01-12 09:19:09,131 INFO L133 SettingsManager]: * sizeof long double=12 [2019-01-12 09:19:09,131 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2019-01-12 09:19:09,131 INFO L133 SettingsManager]: * Use constant arrays=true [2019-01-12 09:19:09,131 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-01-12 09:19:09,132 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-01-12 09:19:09,132 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-01-12 09:19:09,132 INFO L133 SettingsManager]: * To the following directory=./dump/ [2019-01-12 09:19:09,132 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2019-01-12 09:19:09,133 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-01-12 09:19:09,133 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-01-12 09:19:09,133 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-01-12 09:19:09,133 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-01-12 09:19:09,133 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2019-01-12 09:19:09,134 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-01-12 09:19:09,134 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-01-12 09:19:09,134 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 -> a74485b04ec8988328f8bc8f67ebe898d81e7141 [2019-01-12 09:19:09,194 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-01-12 09:19:09,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-01-12 09:19:09,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-01-12 09:19:09,219 INFO L271 PluginConnector]: Initializing CDTParser... [2019-01-12 09:19:09,219 INFO L276 PluginConnector]: CDTParser initialized [2019-01-12 09:19:09,220 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/svcomp/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:09,286 INFO L221 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c702183f/991ef5e689f14f298d88fd194340ade6/FLAG7baebe6f2 [2019-01-12 09:19:09,776 INFO L307 CDTParser]: Found 1 translation units. [2019-01-12 09:19:09,777 INFO L161 CDTParser]: Scanning /storage/repos/svcomp/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:09,792 INFO L355 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c702183f/991ef5e689f14f298d88fd194340ade6/FLAG7baebe6f2 [2019-01-12 09:19:10,070 INFO L363 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c702183f/991ef5e689f14f298d88fd194340ade6 [2019-01-12 09:19:10,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-01-12 09:19:10,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-01-12 09:19:10,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-01-12 09:19:10,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-01-12 09:19:10,082 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2019-01-12 09:19:10,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228edbbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10, skipping insertion in model container [2019-01-12 09:19:10,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-01-12 09:19:10,158 INFO L176 MainTranslator]: Built tables and reachable declarations [2019-01-12 09:19:10,477 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:19:10,491 INFO L191 MainTranslator]: Completed pre-run [2019-01-12 09:19:10,568 INFO L208 PostProcessor]: Analyzing one entry point: main [2019-01-12 09:19:10,702 INFO L195 MainTranslator]: Completed translation [2019-01-12 09:19:10,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10 WrapperNode [2019-01-12 09:19:10,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-01-12 09:19:10,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-01-12 09:19:10,705 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-01-12 09:19:10,706 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2019-01-12 09:19:10,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,770 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-01-12 09:19:10,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-01-12 09:19:10,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-01-12 09:19:10,772 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2019-01-12 09:19:10,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,785 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,785 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,798 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (1/1) ... [2019-01-12 09:19:10,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-01-12 09:19:10,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-01-12 09:19:10,803 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-01-12 09:19:10,803 INFO L276 PluginConnector]: RCFGBuilder initialized [2019-01-12 09:19:10,804 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (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 09:19:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-01-12 09:19:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-01-12 09:19:10,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-01-12 09:19:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-01-12 09:19:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-01-12 09:19:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-01-12 09:19:10,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-01-12 09:19:10,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-01-12 09:19:11,339 INFO L281 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-01-12 09:19:11,339 INFO L286 CfgBuilder]: Removed 11 assue(true) statements. [2019-01-12 09:19:11,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:11 BoogieIcfgContainer [2019-01-12 09:19:11,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-01-12 09:19:11,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-01-12 09:19:11,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-01-12 09:19:11,346 INFO L276 PluginConnector]: TraceAbstraction initialized [2019-01-12 09:19:11,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.01 09:19:10" (1/3) ... [2019-01-12 09:19:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b5e50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:19:11, skipping insertion in model container [2019-01-12 09:19:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.01 09:19:10" (2/3) ... [2019-01-12 09:19:11,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12b5e50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.01 09:19:11, skipping insertion in model container [2019-01-12 09:19:11,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:11" (3/3) ... [2019-01-12 09:19:11,349 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_false-unreach-call_false-valid-memcleanup.i [2019-01-12 09:19:11,359 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-01-12 09:19:11,367 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-01-12 09:19:11,384 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-01-12 09:19:11,413 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2019-01-12 09:19:11,414 INFO L382 AbstractCegarLoop]: Interprodecural is true [2019-01-12 09:19:11,414 INFO L383 AbstractCegarLoop]: Hoare is true [2019-01-12 09:19:11,414 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-01-12 09:19:11,414 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-01-12 09:19:11,415 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-01-12 09:19:11,415 INFO L387 AbstractCegarLoop]: Difference is false [2019-01-12 09:19:11,415 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-01-12 09:19:11,415 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-01-12 09:19:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-01-12 09:19:11,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-01-12 09:19:11,434 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:11,435 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:11,436 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1953862777, now seen corresponding path program 1 times [2019-01-12 09:19:11,443 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:11,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:11,483 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:11,483 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:11,552 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 09:19:11,555 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:11,556 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-01-12 09:19:11,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-01-12 09:19:11,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-01-12 09:19:11,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-01-12 09:19:11,572 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2019-01-12 09:19:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:11,588 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2019-01-12 09:19:11,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-01-12 09:19:11,589 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-01-12 09:19:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:11,597 INFO L225 Difference]: With dead ends: 44 [2019-01-12 09:19:11,597 INFO L226 Difference]: Without dead ends: 19 [2019-01-12 09:19:11,600 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 09:19:11,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-01-12 09:19:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-01-12 09:19:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-01-12 09:19:11,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2019-01-12 09:19:11,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2019-01-12 09:19:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:11,626 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2019-01-12 09:19:11,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-01-12 09:19:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2019-01-12 09:19:11,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-01-12 09:19:11,627 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:11,627 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:11,628 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:11,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1732890257, now seen corresponding path program 1 times [2019-01-12 09:19:11,628 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:11,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:11,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:11,630 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:11,630 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-01-12 09:19:11,837 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 09:19:11,837 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-01-12 09:19:11,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-01-12 09:19:11,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-01-12 09:19:11,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-01-12 09:19:11,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-01-12 09:19:11,840 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2019-01-12 09:19:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-01-12 09:19:12,205 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2019-01-12 09:19:12,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-01-12 09:19:12,207 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-01-12 09:19:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-01-12 09:19:12,208 INFO L225 Difference]: With dead ends: 44 [2019-01-12 09:19:12,208 INFO L226 Difference]: Without dead ends: 33 [2019-01-12 09:19:12,209 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-01-12 09:19:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-01-12 09:19:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2019-01-12 09:19:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-01-12 09:19:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-01-12 09:19:12,214 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2019-01-12 09:19:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-01-12 09:19:12,215 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-01-12 09:19:12,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-01-12 09:19:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-01-12 09:19:12,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-01-12 09:19:12,216 INFO L394 BasicCegarLoop]: Found error trace [2019-01-12 09:19:12,216 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-01-12 09:19:12,216 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-01-12 09:19:12,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-01-12 09:19:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash 397665306, now seen corresponding path program 1 times [2019-01-12 09:19:12,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-01-12 09:19:12,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-01-12 09:19:12,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:12,219 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-01-12 09:19:12,219 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-01-12 09:19:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:19:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-01-12 09:19:12,312 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2019-01-12 09:19:12,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.01 09:19:12 BoogieIcfgContainer [2019-01-12 09:19:12,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-01-12 09:19:12,346 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-01-12 09:19:12,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-01-12 09:19:12,346 INFO L276 PluginConnector]: Witness Printer initialized [2019-01-12 09:19:12,347 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.01 09:19:11" (3/4) ... [2019-01-12 09:19:12,349 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2019-01-12 09:19:12,408 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-01-12 09:19:12,408 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-01-12 09:19:12,409 INFO L168 Benchmark]: Toolchain (without parser) took 2333.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 952.7 MB in the beginning and 1.1 GB in the end (delta: -113.8 MB). Peak memory consumption was 37.7 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:12,411 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 09:19:12,412 INFO L168 Benchmark]: CACSL2BoogieTranslator took 626.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -190.1 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:12,413 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.00 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:12,414 INFO L168 Benchmark]: Boogie Preprocessor took 31.86 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 09:19:12,414 INFO L168 Benchmark]: RCFGBuilder took 538.60 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:12,415 INFO L168 Benchmark]: TraceAbstraction took 1002.80 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: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 11.5 GB. [2019-01-12 09:19:12,417 INFO L168 Benchmark]: Witness Printer took 62.92 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 09:19:12,421 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 626.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 947.3 MB in the beginning and 1.1 GB in the end (delta: -190.1 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 65.00 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.86 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 538.60 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: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1002.80 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: 39.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 11.5 GB. * Witness Printer took 62.92 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 668]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = 1; [L628] List a = (List) malloc(sizeof(struct node)); [L629] COND FALSE !(a == 0) [L630] List t; [L631] List p = a; [L632] COND TRUE __VERIFIER_nondet_int() [L633] COND TRUE \read(flag) [L634] p->h = 2 [L635] flag = 0 [L640] t = (List) malloc(sizeof(struct node)) [L641] COND FALSE !(t == 0) [L642] p->n = t [L643] EXPR p->n [L643] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L645] p->h = 3 [L646] p = a [L647] flag = 1 [L648] EXPR p->h [L648] COND TRUE p->h != 3 [L649] COND TRUE \read(flag) [L650] flag = 0 [L651] EXPR p->h [L651] COND TRUE p->h != 1 [L668] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. UNSAFE Result, 0.9s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 16 SDslu, 38 SDs, 0 SdLazy, 37 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 2 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 507 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...