./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-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(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc ................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 16:59:06,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:59:06,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:59:06,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:59:06,685 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:59:06,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:59:06,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:59:06,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:59:06,705 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:59:06,708 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:59:06,709 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:59:06,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:59:06,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:59:06,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:59:06,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:59:06,718 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:59:06,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:59:06,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:59:06,725 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:59:06,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:59:06,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:59:06,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:59:06,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:59:06,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:59:06,747 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:59:06,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:59:06,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:59:06,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:59:06,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:59:06,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:59:06,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:59:06,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:59:06,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:59:06,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:59:06,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:59:06,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:59:06,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:59:06,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:59:06,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:59:06,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:59:06,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:59:06,761 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:59:06,801 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:59:06,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:59:06,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:59:06,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:59:06,808 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:59:06,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:59:06,808 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:59:06,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:59:06,809 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:59:06,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:59:06,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:59:06,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:59:06,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:59:06,812 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:59:06,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:59:06,814 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:59:06,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:59:06,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:59:06,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:59:06,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:59:06,816 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:59:06,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:59:06,817 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:59:06,817 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:59:06,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:59:06,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:59:06,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:59:06,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:59:06,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:59:06,820 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 -> 9782fe34c3bae6ab09bbe7588de1b0d436c1fccc [2019-11-28 16:59:07,145 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:59:07,164 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:59:07,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:59:07,170 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:59:07,172 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:59:07,173 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-11-28 16:59:07,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f7c2407/0af94a1c90c0443e8b562be5ac62a31e/FLAG1a5ff5d12 [2019-11-28 16:59:07,764 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:59:07,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-optional-2.i [2019-11-28 16:59:07,785 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f7c2407/0af94a1c90c0443e8b562be5ac62a31e/FLAG1a5ff5d12 [2019-11-28 16:59:08,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f7c2407/0af94a1c90c0443e8b562be5ac62a31e [2019-11-28 16:59:08,062 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:59:08,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:59:08,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:08,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:59:08,069 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:59:08,070 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@564c4a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08, skipping insertion in model container [2019-11-28 16:59:08,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,082 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:59:08,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:59:08,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:08,624 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:59:08,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:08,777 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:59:08,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08 WrapperNode [2019-11-28 16:59:08,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:08,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:08,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:59:08,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:59:08,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:08,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:59:08,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:59:08,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:59:08,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,916 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... [2019-11-28 16:59:08,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:59:08,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:59:08,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:59:08,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:59:08,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:59:09,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:59:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:59:09,012 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:59:09,013 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:59:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:59:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:59:09,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:59:09,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:59:09,489 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:59:09,489 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-28 16:59:09,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:09 BoogieIcfgContainer [2019-11-28 16:59:09,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:59:09,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:59:09,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:59:09,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:59:09,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:59:08" (1/3) ... [2019-11-28 16:59:09,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7290f804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:09, skipping insertion in model container [2019-11-28 16:59:09,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:08" (2/3) ... [2019-11-28 16:59:09,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7290f804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:09, skipping insertion in model container [2019-11-28 16:59:09,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:09" (3/3) ... [2019-11-28 16:59:09,499 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2019-11-28 16:59:09,508 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:59:09,516 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:59:09,528 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:59:09,548 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:59:09,548 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:59:09,548 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:59:09,548 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:59:09,549 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:59:09,549 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:59:09,549 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:59:09,549 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:59:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-28 16:59:09,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 16:59:09,568 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:09,569 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:09,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:09,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:09,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1853593862, now seen corresponding path program 1 times [2019-11-28 16:59:09,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:09,582 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016943315] [2019-11-28 16:59:09,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:09,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016943315] [2019-11-28 16:59:09,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:09,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:59:09,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082073825] [2019-11-28 16:59:09,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:59:09,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:09,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:59:09,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:59:09,778 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-28 16:59:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:09,801 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-28 16:59:09,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:59:09,803 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-28 16:59:09,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:09,815 INFO L225 Difference]: With dead ends: 43 [2019-11-28 16:59:09,815 INFO L226 Difference]: Without dead ends: 18 [2019-11-28 16:59:09,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:59:09,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-28 16:59:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-28 16:59:09,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-28 16:59:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-11-28 16:59:09,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2019-11-28 16:59:09,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:09,851 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-28 16:59:09,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:59:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-11-28 16:59:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 16:59:09,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:09,852 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:09,852 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:09,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:09,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2143092324, now seen corresponding path program 1 times [2019-11-28 16:59:09,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:09,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004771179] [2019-11-28 16:59:09,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:09,981 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:59:09,981 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:59:10,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:59:10 BoogieIcfgContainer [2019-11-28 16:59:10,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:59:10,013 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:59:10,013 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:59:10,013 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:59:10,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:09" (3/4) ... [2019-11-28 16:59:10,016 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:59:10,060 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:59:10,060 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:59:10,063 INFO L168 Benchmark]: Toolchain (without parser) took 1998.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -94.3 MB). Peak memory consumption was 43.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:10,063 INFO L168 Benchmark]: CDTParser took 0.89 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:10,064 INFO L168 Benchmark]: CACSL2BoogieTranslator took 713.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:10,065 INFO L168 Benchmark]: Boogie Procedure Inliner took 90.29 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:10,066 INFO L168 Benchmark]: Boogie Preprocessor took 69.85 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:10,067 INFO L168 Benchmark]: RCFGBuilder took 551.02 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: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:10,067 INFO L168 Benchmark]: TraceAbstraction took 520.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:10,068 INFO L168 Benchmark]: Witness Printer took 47.84 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:10,073 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.89 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 713.41 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.4 MB). Free memory was 952.3 MB in the beginning and 1.1 GB in the end (delta: -160.0 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 90.29 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: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 69.85 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 551.02 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: 25.5 MB). Peak memory consumption was 25.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 520.73 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * Witness Printer took 47.84 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: 996]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L985] SLL* head = malloc(sizeof(SLL)); [L986] head->next = ((void*)0) [L987] COND TRUE __VERIFIER_nondet_int() [L987] head->data = 2 [L987] head->opt = malloc(sizeof(SLL)) [L987] EXPR head->opt [L987] head->opt->next = ((void*)0) [L988] SLL* x = head; [L990] COND FALSE !(__VERIFIER_nondet_int()) [L993] x = head [L994] COND TRUE x != ((void*)0) [L996] EXPR x->data [L996] EXPR x->data == 2 && x->opt == x [L996] EXPR x->opt [L996] EXPR x->data == 2 && x->opt == x [L996] COND TRUE !(x->data == 2 && x->opt == x) [L996] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 34 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=26occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...