./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/recursive_list.i --full-output -ea --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8bd4bc60 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -ea -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/ldv-regression/recursive_list.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 3d5040117e2eabdebb8b19ac037d1eb680a830cf ............................................................................................................................................................................................................................................................................. 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 0.1.25-8bd4bc6 [2020-07-28 17:58:11,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-28 17:58:11,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-28 17:58:11,681 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-28 17:58:11,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-28 17:58:11,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-28 17:58:11,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-28 17:58:11,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-28 17:58:11,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-28 17:58:11,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-28 17:58:11,690 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-28 17:58:11,691 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-28 17:58:11,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-28 17:58:11,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-28 17:58:11,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-28 17:58:11,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-28 17:58:11,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-28 17:58:11,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-28 17:58:11,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-28 17:58:11,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-28 17:58:11,704 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-28 17:58:11,705 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-28 17:58:11,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-28 17:58:11,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-28 17:58:11,710 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-28 17:58:11,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-28 17:58:11,711 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-28 17:58:11,712 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-28 17:58:11,712 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-28 17:58:11,713 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-28 17:58:11,714 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-28 17:58:11,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-28 17:58:11,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-28 17:58:11,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-28 17:58:11,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-28 17:58:11,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-28 17:58:11,719 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-28 17:58:11,719 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-28 17:58:11,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-28 17:58:11,720 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-28 17:58:11,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-28 17:58:11,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-28 17:58:11,737 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-28 17:58:11,738 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-28 17:58:11,739 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-28 17:58:11,739 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-28 17:58:11,739 INFO L138 SettingsManager]: * Use SBE=true [2020-07-28 17:58:11,740 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-28 17:58:11,740 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-28 17:58:11,740 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-28 17:58:11,740 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-28 17:58:11,741 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-28 17:58:11,741 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-28 17:58:11,741 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-28 17:58:11,741 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-28 17:58:11,742 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-28 17:58:11,742 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-28 17:58:11,742 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-28 17:58:11,742 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-28 17:58:11,742 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-28 17:58:11,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-28 17:58:11,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-28 17:58:11,743 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-28 17:58:11,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-28 17:58:11,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-28 17:58:11,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-28 17:58:11,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-28 17:58:11,744 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-28 17:58:11,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-28 17:58:11,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-28 17:58:11,745 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-28 17:58:11,745 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 -> 3d5040117e2eabdebb8b19ac037d1eb680a830cf [2020-07-28 17:58:12,057 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-28 17:58:12,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-28 17:58:12,075 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-28 17:58:12,077 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-28 17:58:12,077 INFO L275 PluginConnector]: CDTParser initialized [2020-07-28 17:58:12,078 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/recursive_list.i [2020-07-28 17:58:12,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd31dbdb/6168db89f4c745a3aa1064705e2bc29c/FLAGe3887f3be [2020-07-28 17:58:12,586 INFO L306 CDTParser]: Found 1 translation units. [2020-07-28 17:58:12,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/recursive_list.i [2020-07-28 17:58:12,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd31dbdb/6168db89f4c745a3aa1064705e2bc29c/FLAGe3887f3be [2020-07-28 17:58:12,971 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fd31dbdb/6168db89f4c745a3aa1064705e2bc29c [2020-07-28 17:58:12,974 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-28 17:58:12,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-07-28 17:58:12,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-28 17:58:12,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-28 17:58:12,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-28 17:58:12,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:58:12" (1/1) ... [2020-07-28 17:58:12,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3400ae18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:12, skipping insertion in model container [2020-07-28 17:58:12,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.07 05:58:12" (1/1) ... [2020-07-28 17:58:12,995 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-28 17:58:13,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-28 17:58:13,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:58:13,257 INFO L203 MainTranslator]: Completed pre-run [2020-07-28 17:58:13,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-28 17:58:13,298 INFO L208 MainTranslator]: Completed translation [2020-07-28 17:58:13,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13 WrapperNode [2020-07-28 17:58:13,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-28 17:58:13,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-07-28 17:58:13,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-07-28 17:58:13,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-07-28 17:58:13,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-07-28 17:58:13,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-28 17:58:13,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-28 17:58:13,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-28 17:58:13,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,429 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (1/1) ... [2020-07-28 17:58:13,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-28 17:58:13,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-28 17:58:13,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-28 17:58:13,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-28 17:58:13,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (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 [2020-07-28 17:58:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-28 17:58:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-28 17:58:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-28 17:58:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-28 17:58:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-28 17:58:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-28 17:58:13,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-28 17:58:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-28 17:58:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-28 17:58:13,841 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-28 17:58:13,842 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-07-28 17:58:13,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:13 BoogieIcfgContainer [2020-07-28 17:58:13,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-28 17:58:13,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-28 17:58:13,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-28 17:58:13,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-28 17:58:13,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.07 05:58:12" (1/3) ... [2020-07-28 17:58:13,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75920216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:58:13, skipping insertion in model container [2020-07-28 17:58:13,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.07 05:58:13" (2/3) ... [2020-07-28 17:58:13,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75920216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.07 05:58:13, skipping insertion in model container [2020-07-28 17:58:13,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:13" (3/3) ... [2020-07-28 17:58:13,857 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-07-28 17:58:13,872 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-28 17:58:13,882 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-28 17:58:13,904 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-28 17:58:13,943 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-28 17:58:13,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-28 17:58:13,943 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-28 17:58:13,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-28 17:58:13,944 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-28 17:58:13,944 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-28 17:58:13,944 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-28 17:58:13,955 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-28 17:58:13,972 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-07-28 17:58:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-07-28 17:58:13,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-28 17:58:13,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-07-28 17:58:13,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-28 17:58:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-28 17:58:14,002 INFO L82 PathProgramCache]: Analyzing trace with hash 87858985, now seen corresponding path program 1 times [2020-07-28 17:58:14,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-28 17:58:14,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460841062] [2020-07-28 17:58:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-28 17:58:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:58:14,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:58:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-28 17:58:14,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-28 17:58:14,265 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-28 17:58:14,266 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-28 17:58:14,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-28 17:58:14,306 WARN L170 areAnnotationChecker]: ULTIMATE.startENTRY has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L-1 has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L20 has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L32 has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L20-1 has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L32-1 has no Hoare annotation [2020-07-28 17:58:14,307 WARN L170 areAnnotationChecker]: L48 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: L48 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: L8 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: L48-1 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: L35 has no Hoare annotation [2020-07-28 17:58:14,308 WARN L170 areAnnotationChecker]: ULTIMATE.startFINAL has no Hoare annotation [2020-07-28 17:58:14,309 INFO L163 areAnnotationChecker]: CFG has 0 edges. 0 inductive. 0 not inductive. 0 times theorem prover too weak to decide inductivity. 0 times interpolants missing. [2020-07-28 17:58:14,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.07 05:58:14 BoogieIcfgContainer [2020-07-28 17:58:14,312 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-28 17:58:14,312 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-07-28 17:58:14,312 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-07-28 17:58:14,312 INFO L275 PluginConnector]: Witness Printer initialized [2020-07-28 17:58:14,313 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.07 05:58:13" (3/4) ... [2020-07-28 17:58:14,315 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-07-28 17:58:14,374 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-07-28 17:58:14,375 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-07-28 17:58:14,378 INFO L168 Benchmark]: Toolchain (without parser) took 1401.37 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 960.2 MB in the beginning and 1.0 GB in the end (delta: -86.8 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:14,379 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-07-28 17:58:14,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.03 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:14,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -151.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:14,381 INFO L168 Benchmark]: Boogie Preprocessor took 31.01 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. [2020-07-28 17:58:14,381 INFO L168 Benchmark]: RCFGBuilder took 410.27 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:14,382 INFO L168 Benchmark]: TraceAbstraction took 463.89 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. [2020-07-28 17:58:14,383 INFO L168 Benchmark]: Witness Printer took 62.84 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. [2020-07-28 17:58:14,386 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - AssertionsEnabledResult: Assertions are enabled Assertions are enabled - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 987.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 321.03 ms. Allocated memory is still 1.0 GB. Free memory was 960.2 MB in the beginning and 949.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 104.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 111.7 MB). Free memory was 949.5 MB in the beginning and 1.1 GB in the end (delta: -151.8 MB). Peak memory consumption was 9.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 31.01 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. * RCFGBuilder took 410.27 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: 27.3 MB). Peak memory consumption was 27.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 463.89 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: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 11.5 GB. * Witness Printer took 62.84 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. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i = 1; VAL [i=1] [L37] struct list *l,m; [L38] l = &m [L39] l->next = 0 [L40] l->n = 0 [L25] struct list *new_el; [L20] return malloc(8U); VAL [i=1] [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; VAL [i=1] [L42] l = append(l, 1) [L25] struct list *new_el; [L20] return malloc(8U); VAL [i=1] [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; VAL [i=1] [L43] l = append(l, 2) [L48] EXPR l->next [L48] EXPR l->next->next [L48] EXPR l->next->next->n VAL [i=1] [L48] COND TRUE l->next->next->n == 0 [L8] __VERIFIER_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...