./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.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/list-ext2-properties/simple_and_skiplist_2lvl-1.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 6a10fd260c2f708e346588150444ddfe9656de05 ....................................................................................................................................................................................................................................................................................................................................................................................... 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 16:59:40,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 16:59:40,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 16:59:40,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 16:59:40,716 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 16:59:40,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 16:59:40,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 16:59:40,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 16:59:40,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 16:59:40,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 16:59:40,743 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 16:59:40,746 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 16:59:40,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 16:59:40,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 16:59:40,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 16:59:40,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 16:59:40,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 16:59:40,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 16:59:40,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 16:59:40,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 16:59:40,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 16:59:40,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 16:59:40,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 16:59:40,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 16:59:40,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 16:59:40,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 16:59:40,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 16:59:40,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 16:59:40,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 16:59:40,784 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 16:59:40,784 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 16:59:40,785 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 16:59:40,786 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 16:59:40,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 16:59:40,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 16:59:40,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 16:59:40,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 16:59:40,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 16:59:40,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 16:59:40,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 16:59:40,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 16:59:40,794 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 16:59:40,824 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 16:59:40,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 16:59:40,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 16:59:40,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 16:59:40,828 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 16:59:40,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 16:59:40,829 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 16:59:40,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 16:59:40,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 16:59:40,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 16:59:40,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 16:59:40,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 16:59:40,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 16:59:40,832 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 16:59:40,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 16:59:40,833 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 16:59:40,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 16:59:40,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 16:59:40,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 16:59:40,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 16:59:40,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 16:59:40,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 16:59:40,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 16:59:40,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 16:59:40,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 16:59:40,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 16:59:40,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 16:59:40,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 16:59:40,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 16:59:40,837 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 -> 6a10fd260c2f708e346588150444ddfe9656de05 [2019-11-28 16:59:41,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 16:59:41,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 16:59:41,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 16:59:41,157 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 16:59:41,157 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 16:59:41,158 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-28 16:59:41,227 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4cbd155/cead7e4d854d42e0b2b6cee9ffe8c51b/FLAG5846b6522 [2019-11-28 16:59:41,749 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 16:59:41,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2019-11-28 16:59:41,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4cbd155/cead7e4d854d42e0b2b6cee9ffe8c51b/FLAG5846b6522 [2019-11-28 16:59:42,076 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4cbd155/cead7e4d854d42e0b2b6cee9ffe8c51b [2019-11-28 16:59:42,079 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 16:59:42,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 16:59:42,081 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:42,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 16:59:42,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 16:59:42,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1381c3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42, skipping insertion in model container [2019-11-28 16:59:42,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 16:59:42,159 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 16:59:42,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:42,623 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 16:59:42,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 16:59:42,749 INFO L208 MainTranslator]: Completed translation [2019-11-28 16:59:42,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42 WrapperNode [2019-11-28 16:59:42,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 16:59:42,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:42,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 16:59:42,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 16:59:42,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 16:59:42,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 16:59:42,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 16:59:42,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 16:59:42,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,863 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (1/1) ... [2019-11-28 16:59:42,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 16:59:42,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 16:59:42,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 16:59:42,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 16:59:42,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (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 16:59:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-28 16:59:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 16:59:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-28 16:59:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-28 16:59:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-28 16:59:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 16:59:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 16:59:42,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 16:59:43,510 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 16:59:43,510 INFO L287 CfgBuilder]: Removed 20 assume(true) statements. [2019-11-28 16:59:43,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:43 BoogieIcfgContainer [2019-11-28 16:59:43,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 16:59:43,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 16:59:43,513 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 16:59:43,516 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 16:59:43,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:59:42" (1/3) ... [2019-11-28 16:59:43,517 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e674644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:43, skipping insertion in model container [2019-11-28 16:59:43,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:42" (2/3) ... [2019-11-28 16:59:43,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e674644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:59:43, skipping insertion in model container [2019-11-28 16:59:43,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:43" (3/3) ... [2019-11-28 16:59:43,519 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2019-11-28 16:59:43,530 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 16:59:43,538 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 16:59:43,551 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 16:59:43,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 16:59:43,577 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 16:59:43,577 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 16:59:43,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 16:59:43,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 16:59:43,578 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 16:59:43,578 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 16:59:43,578 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 16:59:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-28 16:59:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 16:59:43,599 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:43,600 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:43,601 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:43,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:43,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2019-11-28 16:59:43,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:43,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106342186] [2019-11-28 16:59:43,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:43,740 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 16:59:43,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106342186] [2019-11-28 16:59:43,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:43,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 16:59:43,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825822327] [2019-11-28 16:59:43,748 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-28 16:59:43,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:43,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-28 16:59:43,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-28 16:59:43,762 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2019-11-28 16:59:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:43,780 INFO L93 Difference]: Finished difference Result 64 states and 94 transitions. [2019-11-28 16:59:43,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 16:59:43,782 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-28 16:59:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:43,791 INFO L225 Difference]: With dead ends: 64 [2019-11-28 16:59:43,792 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 16:59:43,795 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 16:59:43,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 16:59:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 16:59:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 16:59:43,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 16:59:43,832 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 16:59:43,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:43,832 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 16:59:43,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-28 16:59:43,833 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 16:59:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 16:59:43,833 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:43,833 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:43,834 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2019-11-28 16:59:43,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:43,835 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465384236] [2019-11-28 16:59:43,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:43,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:43,952 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 16:59:43,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465384236] [2019-11-28 16:59:43,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 16:59:43,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 16:59:43,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665150365] [2019-11-28 16:59:43,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 16:59:43,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:43,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 16:59:43,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 16:59:43,957 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2019-11-28 16:59:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:44,088 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2019-11-28 16:59:44,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 16:59:44,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-28 16:59:44,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:44,091 INFO L225 Difference]: With dead ends: 29 [2019-11-28 16:59:44,091 INFO L226 Difference]: Without dead ends: 27 [2019-11-28 16:59:44,092 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 16:59:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-28 16:59:44,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2019-11-28 16:59:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 16:59:44,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-28 16:59:44,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2019-11-28 16:59:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:44,099 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-28 16:59:44,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 16:59:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-28 16:59:44,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 16:59:44,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:44,101 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:44,101 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:44,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:44,102 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2019-11-28 16:59:44,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:44,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569037585] [2019-11-28 16:59:44,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:44,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569037585] [2019-11-28 16:59:44,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882447522] [2019-11-28 16:59:44,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:59:44,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 16:59:44,369 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-28 16:59:44,375 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 16:59:44,442 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 16:59:44,443 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,456 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:59:44,462 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-28 16:59:44,462 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,472 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:59:44,473 INFO L534 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,473 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2019-11-28 16:59:44,493 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-28 16:59:44,494 INFO L534 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,504 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:59:44,508 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-28 16:59:44,508 INFO L534 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,514 INFO L614 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-28 16:59:44,514 INFO L534 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-28 16:59:44,515 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-28 16:59:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 16:59:44,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 16:59:44,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-28 16:59:44,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038037168] [2019-11-28 16:59:44,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-28 16:59:44,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 16:59:44,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 16:59:44,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 16:59:44,520 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2019-11-28 16:59:44,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 16:59:44,630 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-28 16:59:44,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 16:59:44,632 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-28 16:59:44,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 16:59:44,633 INFO L225 Difference]: With dead ends: 33 [2019-11-28 16:59:44,634 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 16:59:44,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-28 16:59:44,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 16:59:44,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2019-11-28 16:59:44,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-28 16:59:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-11-28 16:59:44,643 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-11-28 16:59:44,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 16:59:44,645 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-11-28 16:59:44,645 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-28 16:59:44,645 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-11-28 16:59:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 16:59:44,646 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 16:59:44,646 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 16:59:44,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 16:59:44,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 16:59:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 16:59:44,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2019-11-28 16:59:44,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 16:59:44,854 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664700375] [2019-11-28 16:59:44,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 16:59:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:44,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 16:59:44,970 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 16:59:44,970 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-28 16:59:45,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:59:45 BoogieIcfgContainer [2019-11-28 16:59:45,004 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 16:59:45,004 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 16:59:45,004 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 16:59:45,005 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 16:59:45,005 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:59:43" (3/4) ... [2019-11-28 16:59:45,008 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-28 16:59:45,101 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 16:59:45,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 16:59:45,104 INFO L168 Benchmark]: Toolchain (without parser) took 3023.56 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 957.7 MB in the beginning and 982.4 MB in the end (delta: -24.7 MB). Peak memory consumption was 116.9 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:45,105 INFO L168 Benchmark]: CDTParser took 0.91 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 16:59:45,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:45,113 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:45,114 INFO L168 Benchmark]: Boogie Preprocessor took 46.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:45,115 INFO L168 Benchmark]: RCFGBuilder took 636.75 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: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:45,116 INFO L168 Benchmark]: TraceAbstraction took 1491.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 982.4 MB in the end (delta: 91.4 MB). Peak memory consumption was 91.4 MB. Max. memory is 11.5 GB. [2019-11-28 16:59:45,119 INFO L168 Benchmark]: Witness Printer took 97.96 ms. Allocated memory is still 1.2 GB. Free memory is still 982.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 16:59:45,122 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 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 668.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 957.7 MB in the beginning and 1.1 GB in the end (delta: -160.2 MB). Peak memory consumption was 31.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 76.78 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.92 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 636.75 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: 37.5 MB). Peak memory consumption was 37.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1491.10 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 982.4 MB in the end (delta: 91.4 MB). Peak memory consumption was 91.4 MB. Max. memory is 11.5 GB. * Witness Printer took 97.96 ms. Allocated memory is still 1.2 GB. Free memory is still 982.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); [L586] COND FALSE !(a == 0) [L587] List t; [L588] List p = a; [L589] a->h = 2 [L590] COND TRUE __VERIFIER_nondet_int() [L591] p->h = 1 [L592] t = (List) malloc(sizeof(struct node)) [L593] COND FALSE !(t == 0) [L594] p->n = t [L595] EXPR p->n [L595] p = p->n [L590] COND FALSE !(__VERIFIER_nondet_int()) [L597] p->h = 2 [L598] p->n = 0 [L599] p = a [L600] COND TRUE p!=0 [L601] EXPR p->h [L601] COND TRUE p->h != 2 [L602] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 66 SDtfs, 30 SDslu, 48 SDs, 0 SdLazy, 58 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 7 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...