./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-circular-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-circular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/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 95b20088216028e3d05e3cb41d4ed5c20af6a751 ............................................................................................................................................................................................................................................................................................................................................................ 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 0.1.24-6b5699a [2019-11-25 08:57:18,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:57:18,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:57:18,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:57:18,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:57:18,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:57:18,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:57:18,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:57:18,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:57:18,157 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:57:18,158 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:57:18,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:57:18,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:57:18,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:57:18,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:57:18,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:57:18,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:57:18,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:57:18,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:57:18,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:57:18,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:57:18,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:57:18,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:57:18,181 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:57:18,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:57:18,185 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:57:18,185 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:57:18,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:57:18,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:57:18,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:57:18,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:57:18,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:57:18,190 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:57:18,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:57:18,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:57:18,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:57:18,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:57:18,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:57:18,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:57:18,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:57:18,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:57:18,195 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:57:18,221 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:57:18,233 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:57:18,234 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:57:18,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:57:18,234 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:57:18,235 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:57:18,235 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:57:18,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:57:18,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:57:18,236 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:57:18,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:57:18,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:57:18,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:57:18,236 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:57:18,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:57:18,237 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:57:18,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:57:18,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:57:18,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:57:18,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:57:18,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:57:18,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:57:18,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:57:18,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:57:18,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:57:18,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:57:18,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:57:18,241 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:57:18,241 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/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 -> 95b20088216028e3d05e3cb41d4ed5c20af6a751 [2019-11-25 08:57:18,422 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:57:18,440 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:57:18,443 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:57:18,444 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:57:18,445 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:57:18,446 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-circular-1.i [2019-11-25 08:57:18,512 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/data/6565c0ca1/21613249377d49e0b073aab073b903b4/FLAG49f4c0246 [2019-11-25 08:57:18,904 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:57:18,905 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/sv-benchmarks/c/forester-heap/dll-circular-1.i [2019-11-25 08:57:18,915 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/data/6565c0ca1/21613249377d49e0b073aab073b903b4/FLAG49f4c0246 [2019-11-25 08:57:18,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/data/6565c0ca1/21613249377d49e0b073aab073b903b4 [2019-11-25 08:57:18,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:57:18,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:57:18,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:18,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:57:18,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:57:18,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:18" (1/1) ... [2019-11-25 08:57:18,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1cb957 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:18, skipping insertion in model container [2019-11-25 08:57:18,938 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:57:18" (1/1) ... [2019-11-25 08:57:18,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:57:18,981 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:57:19,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:19,442 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:57:19,503 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:57:19,560 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:57:19,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19 WrapperNode [2019-11-25 08:57:19,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:57:19,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:19,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:57:19,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:57:19,570 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:57:19,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:57:19,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:57:19,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:57:19,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... [2019-11-25 08:57:19,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:57:19,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:57:19,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:57:19,638 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:57:19,639 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/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 [2019-11-25 08:57:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:57:19,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:57:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:57:19,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:57:19,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:57:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:57:19,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:57:19,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:57:20,129 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:57:20,129 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-25 08:57:20,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20 BoogieIcfgContainer [2019-11-25 08:57:20,130 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:57:20,131 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:57:20,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:57:20,137 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:57:20,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:57:18" (1/3) ... [2019-11-25 08:57:20,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69292959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:20, skipping insertion in model container [2019-11-25 08:57:20,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:57:19" (2/3) ... [2019-11-25 08:57:20,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69292959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:57:20, skipping insertion in model container [2019-11-25 08:57:20,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20" (3/3) ... [2019-11-25 08:57:20,139 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2019-11-25 08:57:20,148 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:57:20,153 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-25 08:57:20,161 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-25 08:57:20,183 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:57:20,183 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:57:20,183 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:57:20,183 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:57:20,183 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:57:20,184 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:57:20,184 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:57:20,184 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:57:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-25 08:57:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-25 08:57:20,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:20,201 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-25 08:57:20,202 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:20,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:20,206 INFO L82 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2019-11-25 08:57:20,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:20,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609495086] [2019-11-25 08:57:20,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:20,332 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609495086] [2019-11-25 08:57:20,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:20,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:57:20,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240941357] [2019-11-25 08:57:20,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:57:20,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:20,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:57:20,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:57:20,348 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-25 08:57:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:20,362 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2019-11-25 08:57:20,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:57:20,363 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-25 08:57:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:20,369 INFO L225 Difference]: With dead ends: 64 [2019-11-25 08:57:20,369 INFO L226 Difference]: Without dead ends: 26 [2019-11-25 08:57:20,371 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 [2019-11-25 08:57:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-25 08:57:20,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-25 08:57:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-25 08:57:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-11-25 08:57:20,396 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2019-11-25 08:57:20,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:20,396 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-11-25 08:57:20,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:57:20,396 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-11-25 08:57:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-25 08:57:20,397 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:20,397 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:20,397 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2019-11-25 08:57:20,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:20,398 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820488800] [2019-11-25 08:57:20,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:20,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:20,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820488800] [2019-11-25 08:57:20,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:20,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-25 08:57:20,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909179512] [2019-11-25 08:57:20,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:57:20,525 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:20,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:57:20,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:57:20,525 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-11-25 08:57:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:20,614 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-11-25 08:57:20,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:57:20,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-25 08:57:20,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:20,615 INFO L225 Difference]: With dead ends: 42 [2019-11-25 08:57:20,616 INFO L226 Difference]: Without dead ends: 38 [2019-11-25 08:57:20,616 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 [2019-11-25 08:57:20,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-25 08:57:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2019-11-25 08:57:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-25 08:57:20,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-25 08:57:20,622 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2019-11-25 08:57:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:20,622 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-25 08:57:20,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:57:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2019-11-25 08:57:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-25 08:57:20,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:20,623 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:20,624 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:20,624 INFO L82 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2019-11-25 08:57:20,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:20,624 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26208223] [2019-11-25 08:57:20,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:57:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:57:20,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26208223] [2019-11-25 08:57:20,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:57:20,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-25 08:57:20,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464827062] [2019-11-25 08:57:20,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:57:20,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:57:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:57:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:57:20,706 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 3 states. [2019-11-25 08:57:20,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:57:20,735 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2019-11-25 08:57:20,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:57:20,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-25 08:57:20,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:57:20,738 INFO L225 Difference]: With dead ends: 71 [2019-11-25 08:57:20,738 INFO L226 Difference]: Without dead ends: 49 [2019-11-25 08:57:20,739 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 [2019-11-25 08:57:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-25 08:57:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2019-11-25 08:57:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-25 08:57:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2019-11-25 08:57:20,745 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2019-11-25 08:57:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:57:20,745 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2019-11-25 08:57:20,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:57:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2019-11-25 08:57:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:57:20,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:57:20,747 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:57:20,747 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:57:20,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:57:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2019-11-25 08:57:20,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:57:20,750 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241113803] [2019-11-25 08:57:20,750 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:57:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:57:20,847 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:57:20,850 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:57:20,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:57:20 BoogieIcfgContainer [2019-11-25 08:57:20,881 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:57:20,882 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:57:20,882 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:57:20,882 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:57:20,882 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:57:20" (3/4) ... [2019-11-25 08:57:20,886 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:57:20,921 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8a80cc52-654d-4d10-8e50-9e93e604e184/bin/uautomizer/witness.graphml [2019-11-25 08:57:20,921 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:57:20,923 INFO L168 Benchmark]: Toolchain (without parser) took 1993.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -120.1 MB). Peak memory consumption was 38.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:20,923 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:57:20,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 631.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -201.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:20,924 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.91 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. [2019-11-25 08:57:20,925 INFO L168 Benchmark]: Boogie Preprocessor took 31.56 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:20,925 INFO L168 Benchmark]: RCFGBuilder took 492.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:20,926 INFO L168 Benchmark]: TraceAbstraction took 750.18 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:57:20,926 INFO L168 Benchmark]: Witness Printer took 39.40 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. [2019-11-25 08:57:20,929 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 631.59 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 158.3 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -201.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 43.91 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 31.56 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: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 492.37 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 750.18 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: 48.3 MB). Peak memory consumption was 48.3 MB. Max. memory is 11.5 GB. * Witness Printer took 39.40 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1023]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L986] SLL* head = malloc(sizeof(SLL)); [L987] head->next = head [L988] head->data = 0 [L990] SLL* x = head; [L991] int state = 1; [L994] COND FALSE !(__VERIFIER_nondet_int()) [L1016] x->data = state [L1018] EXPR head->next [L1018] x = head->next [L1019] COND FALSE !(!(((void*)0) != x)) [L1021] EXPR x->data [L1021] COND TRUE x->data != 0 [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data [L1023] EXPR x->data [L1023] EXPR x->next [L1023] EXPR x->next->data [L1023] EXPR x->next->data != 0 && x->data > x->next->data [L1023] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1023] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 3 error locations. Result: UNSAFE, OverallTime: 0.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 44 SDslu, 49 SDs, 0 SdLazy, 35 SolverSat, 4 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=35occurred in iteration=3, 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, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 484 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...