./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/dll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b441a4213b4a827a391c87a88efb5ed98112599 ............................................................................................................................................................................................................................................................................................. 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 0.2.0-5485861 [2020-10-25 22:06:07,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:06:07,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:06:07,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:06:07,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:06:07,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:06:07,675 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:06:07,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:06:07,686 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:06:07,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:06:07,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:06:07,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:06:07,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:06:07,704 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:06:07,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:06:07,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:06:07,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:06:07,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:06:07,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:06:07,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:06:07,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:06:07,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:06:07,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:06:07,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:06:07,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:06:07,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:06:07,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:06:07,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:06:07,751 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:06:07,753 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:06:07,753 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:06:07,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:06:07,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:06:07,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:06:07,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:06:07,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:06:07,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:06:07,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:06:07,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:06:07,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:06:07,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:06:07,771 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:06:07,824 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:06:07,825 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:06:07,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:06:07,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:06:07,829 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:06:07,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:06:07,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:06:07,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:06:07,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:06:07,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:06:07,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:06:07,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:06:07,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:06:07,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:06:07,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:06:07,833 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:06:07,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:06:07,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:06:07,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:06:07,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:06:07,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:06:07,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:06:07,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:06:07,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:06:07,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:06:07,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:06:07,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:06:07,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:06:07,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:06:07,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b441a4213b4a827a391c87a88efb5ed98112599 [2020-10-25 22:06:08,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:06:08,267 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:06:08,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:06:08,272 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:06:08,273 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:06:08,276 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/dll-optional-2.i [2020-10-25 22:06:08,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eea8f5c4/3173904da7cb4344a05a87c3ee010527/FLAG5b1eabb58 [2020-10-25 22:06:09,180 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:06:09,181 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/dll-optional-2.i [2020-10-25 22:06:09,195 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eea8f5c4/3173904da7cb4344a05a87c3ee010527/FLAG5b1eabb58 [2020-10-25 22:06:09,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6eea8f5c4/3173904da7cb4344a05a87c3ee010527 [2020-10-25 22:06:09,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:06:09,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:06:09,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:06:09,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:06:09,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:06:09,469 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:06:09" (1/1) ... [2020-10-25 22:06:09,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@466af953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:09, skipping insertion in model container [2020-10-25 22:06:09,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:06:09" (1/1) ... [2020-10-25 22:06:09,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:06:09,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:06:09,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:06:09,910 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:06:09,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:06:10,059 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:06:10,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10 WrapperNode [2020-10-25 22:06:10,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:06:10,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:06:10,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:06:10,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:06:10,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:06:10,137 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:06:10,137 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:06:10,137 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:06:10,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,200 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (1/1) ... [2020-10-25 22:06:10,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:06:10,217 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:06:10,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:06:10,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:06:10,218 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (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 [2020-10-25 22:06:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-25 22:06:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-25 22:06:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-25 22:06:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-25 22:06:10,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:06:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-25 22:06:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-25 22:06:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:06:10,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:06:10,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:06:11,079 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:06:11,080 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-25 22:06:11,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:06:11 BoogieIcfgContainer [2020-10-25 22:06:11,083 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:06:11,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:06:11,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:06:11,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:06:11,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:06:09" (1/3) ... [2020-10-25 22:06:11,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982793e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:06:11, skipping insertion in model container [2020-10-25 22:06:11,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:06:10" (2/3) ... [2020-10-25 22:06:11,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@982793e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:06:11, skipping insertion in model container [2020-10-25 22:06:11,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:06:11" (3/3) ... [2020-10-25 22:06:11,095 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2020-10-25 22:06:11,111 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:06:11,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:06:11,134 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:06:11,177 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:06:11,178 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:06:11,178 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:06:11,178 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:06:11,178 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:06:11,178 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:06:11,179 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:06:11,179 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:06:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-10-25 22:06:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:06:11,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:06:11,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:06:11,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:06:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:06:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1626835065, now seen corresponding path program 1 times [2020-10-25 22:06:11,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:06:11,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354408936] [2020-10-25 22:06:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:06:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:06:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:06:11,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354408936] [2020-10-25 22:06:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:06:11,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:06:11,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649251322] [2020-10-25 22:06:11,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:06:11,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:06:11,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:06:11,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:06:11,461 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2020-10-25 22:06:11,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:06:11,482 INFO L93 Difference]: Finished difference Result 46 states and 70 transitions. [2020-10-25 22:06:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:06:11,484 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-10-25 22:06:11,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:06:11,496 INFO L225 Difference]: With dead ends: 46 [2020-10-25 22:06:11,496 INFO L226 Difference]: Without dead ends: 19 [2020-10-25 22:06:11,500 INFO L677 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 [2020-10-25 22:06:11,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-25 22:06:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-25 22:06:11,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-25 22:06:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2020-10-25 22:06:11,547 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 12 [2020-10-25 22:06:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:06:11,547 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-10-25 22:06:11,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:06:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2020-10-25 22:06:11,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-25 22:06:11,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:06:11,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:06:11,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:06:11,549 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:06:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:06:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash -2011352413, now seen corresponding path program 1 times [2020-10-25 22:06:11,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:06:11,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997357307] [2020-10-25 22:06:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:06:11,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:06:11,642 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:06:11,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-25 22:06:11,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-25 22:06:11,749 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-25 22:06:11,749 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-25 22:06:11,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:06:11,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:06:11 BoogieIcfgContainer [2020-10-25 22:06:11,784 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:06:11,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:06:11,786 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:06:11,786 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:06:11,787 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:06:11" (3/4) ... [2020-10-25 22:06:11,790 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-25 22:06:11,839 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:06:11,840 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:06:11,843 INFO L168 Benchmark]: Toolchain (without parser) took 2388.97 ms. Allocated memory was 41.9 MB in the beginning and 60.8 MB in the end (delta: 18.9 MB). Free memory was 27.6 MB in the beginning and 28.2 MB in the end (delta: -595.0 kB). Peak memory consumption was 18.0 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,844 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.8 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:06:11,845 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.23 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 26.9 MB in the beginning and 24.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,846 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.71 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 22.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:06:11,846 INFO L168 Benchmark]: Boogie Preprocessor took 78.74 ms. Allocated memory is still 50.3 MB. Free memory was 35.0 MB in the beginning and 33.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:06:11,847 INFO L168 Benchmark]: RCFGBuilder took 866.13 ms. Allocated memory is still 50.3 MB. Free memory was 33.5 MB in the beginning and 33.2 MB in the end (delta: 294.2 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,848 INFO L168 Benchmark]: TraceAbstraction took 699.63 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 32.9 MB in the beginning and 30.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,849 INFO L168 Benchmark]: Witness Printer took 54.51 ms. Allocated memory is still 60.8 MB. Free memory was 30.3 MB in the beginning and 28.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:06:11,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.8 MB in the end (delta: 28.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 598.23 ms. Allocated memory was 41.9 MB in the beginning and 50.3 MB in the end (delta: 8.4 MB). Free memory was 26.9 MB in the beginning and 24.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.71 ms. Allocated memory is still 50.3 MB. Free memory was 24.5 MB in the beginning and 22.5 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.74 ms. Allocated memory is still 50.3 MB. Free memory was 35.0 MB in the beginning and 33.5 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 866.13 ms. Allocated memory is still 50.3 MB. Free memory was 33.5 MB in the beginning and 33.2 MB in the end (delta: 294.2 kB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 699.63 ms. Allocated memory was 50.3 MB in the beginning and 60.8 MB in the end (delta: 10.5 MB). Free memory was 32.9 MB in the beginning and 30.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. * Witness Printer took 54.51 ms. Allocated memory is still 60.8 MB. Free memory was 30.3 MB in the beginning and 28.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] COND TRUE __VERIFIER_nondet_int() [L1000] head->data = 2 [L1000] head->opt = malloc(sizeof(SLL)) [L1000] EXPR head->opt [L1000] head->opt->next = ((void*)0) [L1001] SLL* x = head; [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1006] x = head [L1007] COND TRUE x != ((void*)0) [L1009] EXPR x->data [L1009] EXPR x->data == 2 && x->opt == x [L1009] EXPR x->opt [L1009] EXPR x->data == 2 && x->opt == x [L1009] COND TRUE !(x->data == 2 && x->opt == x) [L985] COND FALSE !(0) [L985] __assert_fail ("0", "dll-optional-2.c", 16, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s 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 DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 25 NumberOfCodeBlocks, 25 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...