./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i -s /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a74485b04ec8988328f8bc8f67ebe898d81e7141 ........................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:16:51,516 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:16:51,517 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:16:51,525 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:16:51,526 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:16:51,526 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:16:51,527 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:16:51,529 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:16:51,530 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:16:51,530 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:16:51,531 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:16:51,531 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:16:51,532 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:16:51,533 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:16:51,534 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:16:51,534 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:16:51,535 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:16:51,536 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:16:51,537 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:16:51,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:16:51,539 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:16:51,540 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:16:51,542 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:16:51,542 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:16:51,542 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:16:51,543 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:16:51,544 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:16:51,544 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:16:51,545 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:16:51,546 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:16:51,546 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:16:51,546 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:16:51,546 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:16:51,547 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:16:51,547 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:16:51,548 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:16:51,548 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:16:51,558 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:16:51,559 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:16:51,559 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:16:51,559 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:16:51,560 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:16:51,560 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:16:51,560 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:16:51,560 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:16:51,560 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:16:51,560 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:16:51,561 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:16:51,562 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:16:51,562 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:16:51,562 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:16:51,562 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:16:51,562 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:16:51,562 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:16:51,563 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:16:51,563 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a74485b04ec8988328f8bc8f67ebe898d81e7141 [2018-11-28 12:16:51,585 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:16:51,593 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:16:51,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:16:51,596 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:16:51,597 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:16:51,597 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/../../sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-28 12:16:51,637 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/data/b3af95550/aba3067b09fc42ee8576df6b8be094c2/FLAGa09150393 [2018-11-28 12:16:51,971 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:16:51,971 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/sv-benchmarks/c/list-properties/alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-28 12:16:51,979 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/data/b3af95550/aba3067b09fc42ee8576df6b8be094c2/FLAGa09150393 [2018-11-28 12:16:51,988 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/data/b3af95550/aba3067b09fc42ee8576df6b8be094c2 [2018-11-28 12:16:51,990 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:16:51,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:16:51,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:16:51,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:16:51,993 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:16:51,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:16:51" (1/1) ... [2018-11-28 12:16:51,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cd293b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:51, skipping insertion in model container [2018-11-28 12:16:51,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:16:51" (1/1) ... [2018-11-28 12:16:51,999 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:16:52,021 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:16:52,192 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:16:52,241 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:16:52,271 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:16:52,303 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:16:52,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52 WrapperNode [2018-11-28 12:16:52,304 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:16:52,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:16:52,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:16:52,305 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:16:52,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:16:52,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:16:52,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:16:52,323 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:16:52,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,336 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... [2018-11-28 12:16:52,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:16:52,343 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:16:52,343 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:16:52,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:16:52,344 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/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 [2018-11-28 12:16:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2018-11-28 12:16:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2018-11-28 12:16:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 12:16:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-28 12:16:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 12:16:52,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:16:52,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:16:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:16:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:16:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2018-11-28 12:16:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2018-11-28 12:16:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 12:16:52,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:16:52,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:16:52,584 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:16:52,584 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-11-28 12:16:52,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:16:52 BoogieIcfgContainer [2018-11-28 12:16:52,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:16:52,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:16:52,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:16:52,588 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:16:52,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:16:51" (1/3) ... [2018-11-28 12:16:52,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ea18fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:16:52, skipping insertion in model container [2018-11-28 12:16:52,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:16:52" (2/3) ... [2018-11-28 12:16:52,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ea18fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:16:52, skipping insertion in model container [2018-11-28 12:16:52,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:16:52" (3/3) ... [2018-11-28 12:16:52,590 INFO L112 eAbstractionObserver]: Analyzing ICFG alternating_list_false-unreach-call_false-valid-memcleanup.i [2018-11-28 12:16:52,596 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:16:52,600 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:16:52,610 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:16:52,627 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:16:52,627 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:16:52,627 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:16:52,628 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:16:52,628 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:16:52,628 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:16:52,628 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:16:52,628 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:16:52,628 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:16:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2018-11-28 12:16:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-28 12:16:52,641 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:16:52,642 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:16:52,643 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:16:52,646 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:16:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash 685193704, now seen corresponding path program 1 times [2018-11-28 12:16:52,648 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:16:52,648 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:16:52,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:16:52,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:16:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:16:52,732 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:16:52,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-28 12:16:52,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-28 12:16:52,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-28 12:16:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:16:52,743 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2018-11-28 12:16:52,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:16:52,755 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2018-11-28 12:16:52,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-28 12:16:52,756 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-11-28 12:16:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:16:52,761 INFO L225 Difference]: With dead ends: 52 [2018-11-28 12:16:52,761 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:16:52,763 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-28 12:16:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:16:52,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 12:16:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:16:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 12:16:52,784 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2018-11-28 12:16:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:16:52,784 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 12:16:52,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-28 12:16:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 12:16:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 12:16:52,785 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:16:52,785 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:16:52,785 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:16:52,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:16:52,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1526726252, now seen corresponding path program 1 times [2018-11-28 12:16:52,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:16:52,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:16:52,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:16:52,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:16:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:16:52,839 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:16:52,840 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-28 12:16:52,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-28 12:16:52,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-28 12:16:52,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:16:52,841 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 3 states. [2018-11-28 12:16:52,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:16:52,879 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2018-11-28 12:16:52,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-28 12:16:52,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-11-28 12:16:52,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:16:52,880 INFO L225 Difference]: With dead ends: 51 [2018-11-28 12:16:52,880 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 12:16:52,881 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-28 12:16:52,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 12:16:52,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 12:16:52,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 12:16:52,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2018-11-28 12:16:52,885 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 16 [2018-11-28 12:16:52,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:16:52,886 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2018-11-28 12:16:52,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-28 12:16:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2018-11-28 12:16:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-28 12:16:52,886 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:16:52,886 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:16:52,886 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:16:52,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:16:52,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1526733196, now seen corresponding path program 1 times [2018-11-28 12:16:52,887 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:16:52,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:16:52,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:16:52,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:16:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:16:52,952 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:16:52,952 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:16:52,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:16:52,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:16:52,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:16:52,953 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2018-11-28 12:16:53,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:16:53,020 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2018-11-28 12:16:53,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:16:53,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2018-11-28 12:16:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:16:53,021 INFO L225 Difference]: With dead ends: 61 [2018-11-28 12:16:53,021 INFO L226 Difference]: Without dead ends: 46 [2018-11-28 12:16:53,022 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-11-28 12:16:53,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-11-28 12:16:53,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2018-11-28 12:16:53,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-28 12:16:53,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2018-11-28 12:16:53,027 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2018-11-28 12:16:53,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:16:53,028 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2018-11-28 12:16:53,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:16:53,028 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2018-11-28 12:16:53,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:16:53,028 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:16:53,029 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:16:53,029 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:16:53,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:16:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash 480411551, now seen corresponding path program 1 times [2018-11-28 12:16:53,029 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:16:53,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:16:53,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:53,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:16:53,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:16:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:16:53,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:16:53,077 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:16:53,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:16:53 BoogieIcfgContainer [2018-11-28 12:16:53,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:16:53,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:16:53,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:16:53,104 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:16:53,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:16:52" (3/4) ... [2018-11-28 12:16:53,106 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 12:16:53,141 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_975e7bc1-719c-4f8b-836e-0639970b9f4f/bin-2019/uautomizer/witness.graphml [2018-11-28 12:16:53,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:16:53,142 INFO L168 Benchmark]: Toolchain (without parser) took 1151.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -109.5 MB). Peak memory consumption was 49.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:16:53,143 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:16:53,143 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:16:53,144 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.91 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. [2018-11-28 12:16:53,144 INFO L168 Benchmark]: Boogie Preprocessor took 20.57 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. [2018-11-28 12:16:53,144 INFO L168 Benchmark]: RCFGBuilder took 241.43 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:16:53,144 INFO L168 Benchmark]: TraceAbstraction took 518.20 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: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:16:53,145 INFO L168 Benchmark]: Witness Printer took 37.26 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:16:53,147 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 313.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.9 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -193.0 MB). Peak memory consumption was 24.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.91 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. * Boogie Preprocessor took 20.57 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 241.43 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: 21.4 MB). Peak memory consumption was 21.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 518.20 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: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 11.5 GB. * Witness Printer took 37.26 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 668]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] int flag = 1; [L628] List a = (List) malloc(sizeof(struct node)); VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}] [L629] COND FALSE !(a == 0) VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}] [L630] List t; [L631] List p = a; VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={14:0}, p={14:0}] [L632] COND TRUE __VERIFIER_nondet_int() [L633] COND TRUE \read(flag) [L634] p->h = 2 [L635] flag = 0 VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={14:0}, p={14:0}] [L640] t = (List) malloc(sizeof(struct node)) VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, t={17:0}] [L641] COND FALSE !(t == 0) VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, t={17:0}] [L642] p->n = t [L643] EXPR p->n [L643] p = p->n [L632] COND FALSE !(__VERIFIER_nondet_int()) [L645] p->h = 3 [L646] p = a [L647] flag = 1 VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, t={17:0}] [L648] EXPR p->h VAL [a={14:0}, flag=1, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, p->h=2, t={17:0}] [L648] COND TRUE p->h != 3 [L649] COND TRUE \read(flag) [L650] flag = 0 [L651] EXPR p->h VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, p->h=2, t={17:0}] [L651] COND TRUE p->h != 1 [L668] __VERIFIER_error() VAL [a={14:0}, flag=0, malloc(sizeof(struct node))={17:0}, malloc(sizeof(struct node))={14:0}, p={14:0}, t={17:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. UNSAFE Result, 0.4s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 93 SDtfs, 24 SDslu, 71 SDs, 0 SdLazy, 35 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 44 ConstructedInterpolants, 0 QuantifiedInterpolants, 1126 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...