./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-token-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/forester-heap/sll-token-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 60dcf5da7f0124de96473d8010137f60c5cb2803 ........................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-30f4e4a [2019-11-27 23:55:22,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-27 23:55:22,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-27 23:55:22,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-27 23:55:22,301 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-27 23:55:22,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-27 23:55:22,305 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-27 23:55:22,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-27 23:55:22,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-27 23:55:22,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-27 23:55:22,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-27 23:55:22,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-27 23:55:22,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-27 23:55:22,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-27 23:55:22,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-27 23:55:22,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-27 23:55:22,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-27 23:55:22,335 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-27 23:55:22,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-27 23:55:22,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-27 23:55:22,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-27 23:55:22,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-27 23:55:22,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-27 23:55:22,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-27 23:55:22,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-27 23:55:22,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-27 23:55:22,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-27 23:55:22,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-27 23:55:22,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-27 23:55:22,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-27 23:55:22,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-27 23:55:22,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-27 23:55:22,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-27 23:55:22,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-27 23:55:22,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-27 23:55:22,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-27 23:55:22,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-27 23:55:22,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-27 23:55:22,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-27 23:55:22,367 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-27 23:55:22,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-27 23:55:22,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-27 23:55:22,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-27 23:55:22,391 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-27 23:55:22,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-27 23:55:22,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-27 23:55:22,393 INFO L138 SettingsManager]: * Use SBE=true [2019-11-27 23:55:22,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-27 23:55:22,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-27 23:55:22,394 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-27 23:55:22,394 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-27 23:55:22,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-27 23:55:22,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-27 23:55:22,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-27 23:55:22,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-27 23:55:22,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-27 23:55:22,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-27 23:55:22,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-27 23:55:22,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-27 23:55:22,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-27 23:55:22,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-27 23:55:22,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-27 23:55:22,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-27 23:55:22,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-27 23:55:22,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-27 23:55:22,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-27 23:55:22,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-27 23:55:22,401 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-27 23:55:22,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-27 23:55:22,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-27 23:55:22,401 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 -> 60dcf5da7f0124de96473d8010137f60c5cb2803 [2019-11-27 23:55:22,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-27 23:55:22,721 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-27 23:55:22,725 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-27 23:55:22,727 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-27 23:55:22,727 INFO L275 PluginConnector]: CDTParser initialized [2019-11-27 23:55:22,728 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-token-1.i [2019-11-27 23:55:22,814 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29278a551/d55be813b81e412093752188e6b4bd06/FLAGffad957bc [2019-11-27 23:55:23,358 INFO L306 CDTParser]: Found 1 translation units. [2019-11-27 23:55:23,359 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-token-1.i [2019-11-27 23:55:23,372 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29278a551/d55be813b81e412093752188e6b4bd06/FLAGffad957bc [2019-11-27 23:55:23,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29278a551/d55be813b81e412093752188e6b4bd06 [2019-11-27 23:55:23,654 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-27 23:55:23,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-27 23:55:23,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:23,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-27 23:55:23,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-27 23:55:23,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:23" (1/1) ... [2019-11-27 23:55:23,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1200897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:23, skipping insertion in model container [2019-11-27 23:55:23,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:55:23" (1/1) ... [2019-11-27 23:55:23,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-27 23:55:23,729 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-27 23:55:24,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:24,182 INFO L203 MainTranslator]: Completed pre-run [2019-11-27 23:55:24,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-27 23:55:24,298 INFO L208 MainTranslator]: Completed translation [2019-11-27 23:55:24,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24 WrapperNode [2019-11-27 23:55:24,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-27 23:55:24,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:24,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-27 23:55:24,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-27 23:55:24,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,338 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,362 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-27 23:55:24,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-27 23:55:24,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-27 23:55:24,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-27 23:55:24,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,376 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,385 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (1/1) ... [2019-11-27 23:55:24,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-27 23:55:24,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-27 23:55:24,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-27 23:55:24,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-27 23:55:24,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (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 [2019-11-27 23:55:24,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-27 23:55:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-27 23:55:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-27 23:55:24,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-27 23:55:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-27 23:55:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-27 23:55:24,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-27 23:55:24,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-27 23:55:24,861 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-27 23:55:24,862 INFO L297 CfgBuilder]: Removed 19 assume(true) statements. [2019-11-27 23:55:24,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:24 BoogieIcfgContainer [2019-11-27 23:55:24,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-27 23:55:24,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-27 23:55:24,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-27 23:55:24,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-27 23:55:24,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:55:23" (1/3) ... [2019-11-27 23:55:24,870 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63966438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:24, skipping insertion in model container [2019-11-27 23:55:24,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:55:24" (2/3) ... [2019-11-27 23:55:24,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63966438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:55:24, skipping insertion in model container [2019-11-27 23:55:24,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:24" (3/3) ... [2019-11-27 23:55:24,873 INFO L109 eAbstractionObserver]: Analyzing ICFG sll-token-1.i [2019-11-27 23:55:24,884 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-27 23:55:24,892 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-27 23:55:24,904 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-27 23:55:24,926 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-27 23:55:24,926 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-27 23:55:24,926 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-27 23:55:24,926 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-27 23:55:24,927 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-27 23:55:24,927 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-27 23:55:24,927 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-27 23:55:24,927 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-27 23:55:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2019-11-27 23:55:24,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-27 23:55:24,947 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:24,948 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-27 23:55:24,949 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:24,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:24,954 INFO L82 PathProgramCache]: Analyzing trace with hash 890337990, now seen corresponding path program 1 times [2019-11-27 23:55:24,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:24,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10120147] [2019-11-27 23:55:24,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:55:25,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10120147] [2019-11-27 23:55:25,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:25,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-27 23:55:25,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715706476] [2019-11-27 23:55:25,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-27 23:55:25,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:25,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-27 23:55:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-27 23:55:25,168 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 2 states. [2019-11-27 23:55:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:25,191 INFO L93 Difference]: Finished difference Result 86 states and 132 transitions. [2019-11-27 23:55:25,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-27 23:55:25,193 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-27 23:55:25,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:25,204 INFO L225 Difference]: With dead ends: 86 [2019-11-27 23:55:25,204 INFO L226 Difference]: Without dead ends: 39 [2019-11-27 23:55:25,208 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 [2019-11-27 23:55:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-27 23:55:25,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-27 23:55:25,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-27 23:55:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2019-11-27 23:55:25,247 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 6 [2019-11-27 23:55:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:25,248 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2019-11-27 23:55:25,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-27 23:55:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2019-11-27 23:55:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-27 23:55:25,250 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:25,250 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-27 23:55:25,251 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:25,252 INFO L82 PathProgramCache]: Analyzing trace with hash 889571369, now seen corresponding path program 1 times [2019-11-27 23:55:25,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:25,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510223148] [2019-11-27 23:55:25,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:55:25,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510223148] [2019-11-27 23:55:25,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:25,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-27 23:55:25,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153951260] [2019-11-27 23:55:25,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-27 23:55:25,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-27 23:55:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-27 23:55:25,335 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 3 states. [2019-11-27 23:55:25,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:25,393 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2019-11-27 23:55:25,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-27 23:55:25,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-27 23:55:25,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:25,395 INFO L225 Difference]: With dead ends: 39 [2019-11-27 23:55:25,395 INFO L226 Difference]: Without dead ends: 37 [2019-11-27 23:55:25,396 INFO L630 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 [2019-11-27 23:55:25,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-27 23:55:25,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-27 23:55:25,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-27 23:55:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-27 23:55:25,403 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 6 [2019-11-27 23:55:25,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:25,403 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-27 23:55:25,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-27 23:55:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-27 23:55:25,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-27 23:55:25,405 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:25,405 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:25,405 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:25,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1806865149, now seen corresponding path program 1 times [2019-11-27 23:55:25,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:25,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855101308] [2019-11-27 23:55:25,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-27 23:55:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-27 23:55:25,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855101308] [2019-11-27 23:55:25,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-27 23:55:25,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-27 23:55:25,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075944997] [2019-11-27 23:55:25,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-27 23:55:25,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-27 23:55:25,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-27 23:55:25,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-27 23:55:25,513 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 4 states. [2019-11-27 23:55:25,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-27 23:55:25,593 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2019-11-27 23:55:25,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-27 23:55:25,594 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-27 23:55:25,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-27 23:55:25,596 INFO L225 Difference]: With dead ends: 63 [2019-11-27 23:55:25,596 INFO L226 Difference]: Without dead ends: 61 [2019-11-27 23:55:25,596 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-27 23:55:25,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-27 23:55:25,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2019-11-27 23:55:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-27 23:55:25,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-27 23:55:25,605 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 7 [2019-11-27 23:55:25,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-27 23:55:25,606 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-27 23:55:25,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-27 23:55:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-27 23:55:25,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-27 23:55:25,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-27 23:55:25,607 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-27 23:55:25,608 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-27 23:55:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-27 23:55:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash -913382283, now seen corresponding path program 1 times [2019-11-27 23:55:25,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-27 23:55:25,609 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422896225] [2019-11-27 23:55:25,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-27 23:55:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-27 23:55:25,743 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-27 23:55:25,744 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-27 23:55:25,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.11 11:55:25 BoogieIcfgContainer [2019-11-27 23:55:25,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-27 23:55:25,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-27 23:55:25,774 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-27 23:55:25,774 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-27 23:55:25,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:55:24" (3/4) ... [2019-11-27 23:55:25,777 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-27 23:55:25,823 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-27 23:55:25,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-27 23:55:25,827 INFO L168 Benchmark]: Toolchain (without parser) took 2170.03 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 959.0 MB in the beginning and 1.0 GB in the end (delta: -67.8 MB). Peak memory consumption was 68.5 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,827 INFO L168 Benchmark]: CDTParser took 0.29 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. [2019-11-27 23:55:25,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 642.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,830 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.31 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,830 INFO L168 Benchmark]: Boogie Preprocessor took 37.96 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. [2019-11-27 23:55:25,831 INFO L168 Benchmark]: RCFGBuilder took 463.31 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: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,832 INFO L168 Benchmark]: TraceAbstraction took 908.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,833 INFO L168 Benchmark]: Witness Printer took 50.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2019-11-27 23:55:25,837 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 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 642.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 959.0 MB in the beginning and 1.1 GB in the end (delta: -153.3 MB). Peak memory consumption was 25.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 62.31 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: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 37.96 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 463.31 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: 24.7 MB). Peak memory consumption was 24.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 908.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 47.2 MB). Peak memory consumption was 47.2 MB. Max. memory is 11.5 GB. * Witness Printer took 50.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1020]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L992] SLL* head = malloc(sizeof(SLL)); [L993] head->next = ((void*)0) [L994] head->data = 0 [L996] SLL* x = head; [L999] COND FALSE !(__VERIFIER_nondet_int()) [L1007] x->data = 1 [L1008] x->next = malloc(sizeof(SLL)) [L1009] EXPR x->next [L1009] x->next->data = 2 [L1011] x = head [L1013] COND FALSE !(!(((void*)0) != x)) [L1015] EXPR x->data [L1015] COND FALSE !(1 != x->data) [L1020] EXPR x->data [L1020] COND TRUE !(2 == x->data) [L1020] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 44 locations, 6 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 106 SDtfs, 76 SDslu, 44 SDs, 0 SdLazy, 39 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred 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, 26 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 173 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...