./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-optional-2.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_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/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 8409443a6b8db5c0500e3e8aa54c33463c524ec9 ............................................................................................................................................................................................................................................................................... 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 08:46:08,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:46:08,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:46:08,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:46:08,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:46:08,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:46:08,089 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:46:08,097 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:46:08,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:46:08,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:46:08,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:46:08,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:46:08,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:46:08,111 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:46:08,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:46:08,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:46:08,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:46:08,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:46:08,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:46:08,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:46:08,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:46:08,131 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:46:08,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:46:08,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:46:08,137 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:46:08,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:46:08,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:46:08,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:46:08,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:46:08,140 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:46:08,140 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:46:08,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:46:08,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:46:08,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:46:08,143 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:46:08,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:46:08,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:46:08,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:46:08,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:46:08,145 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:46:08,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:46:08,146 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:46:08,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:46:08,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:46:08,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:46:08,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:46:08,172 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:46:08,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:46:08,172 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:46:08,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:46:08,174 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:46:08,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:46:08,174 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:46:08,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:46:08,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:46:08,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:46:08,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:46:08,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:46:08,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:46:08,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:46:08,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:46:08,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:46:08,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:46:08,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:46:08,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:46:08,176 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_e9b307f5-ec75-47b1-b3f5-77750d0f4979/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 -> 8409443a6b8db5c0500e3e8aa54c33463c524ec9 [2019-11-25 08:46:08,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:46:08,342 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:46:08,345 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:46:08,352 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:46:08,352 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:46:08,354 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-11-25 08:46:08,405 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/data/4191c4594/51d477ff903a49959889969b0d5f6154/FLAGd41e1eb43 [2019-11-25 08:46:08,910 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:46:08,910 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-11-25 08:46:08,922 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/data/4191c4594/51d477ff903a49959889969b0d5f6154/FLAGd41e1eb43 [2019-11-25 08:46:09,424 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/data/4191c4594/51d477ff903a49959889969b0d5f6154 [2019-11-25 08:46:09,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:46:09,427 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:46:09,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:09,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:46:09,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:46:09,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f7d17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09, skipping insertion in model container [2019-11-25 08:46:09,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:46:09,484 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:46:09,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:09,794 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:46:09,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:46:09,877 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:46:09,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09 WrapperNode [2019-11-25 08:46:09,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:46:09,879 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:09,879 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:46:09,879 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:46:09,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:46:09,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:46:09,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:46:09,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:46:09,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:09,998 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... [2019-11-25 08:46:10,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:46:10,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:46:10,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:46:10,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:46:10,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/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 08:46:10,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-25 08:46:10,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:46:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:46:10,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:46:10,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:46:10,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:46:10,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:46:10,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:46:10,481 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:46:10,481 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-25 08:46:10,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:10 BoogieIcfgContainer [2019-11-25 08:46:10,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:46:10,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:46:10,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:46:10,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:46:10,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:46:09" (1/3) ... [2019-11-25 08:46:10,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e71a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:10, skipping insertion in model container [2019-11-25 08:46:10,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:46:09" (2/3) ... [2019-11-25 08:46:10,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7e71a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:46:10, skipping insertion in model container [2019-11-25 08:46:10,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:10" (3/3) ... [2019-11-25 08:46:10,489 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2019-11-25 08:46:10,496 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:46:10,503 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:46:10,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:46:10,540 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:46:10,540 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:46:10,541 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:46:10,541 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:46:10,541 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:46:10,541 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:46:10,541 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:46:10,541 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:46:10,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-25 08:46:10,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-25 08:46:10,559 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:10,560 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:10,560 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:10,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1853593862, now seen corresponding path program 1 times [2019-11-25 08:46:10,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:10,571 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286352445] [2019-11-25 08:46:10,572 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:46:10,709 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 08:46:10,709 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286352445] [2019-11-25 08:46:10,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:46:10,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:46:10,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599820191] [2019-11-25 08:46:10,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-25 08:46:10,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:46:10,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-25 08:46:10,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-25 08:46:10,725 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-25 08:46:10,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:46:10,739 INFO L93 Difference]: Finished difference Result 43 states and 65 transitions. [2019-11-25 08:46:10,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-25 08:46:10,741 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2019-11-25 08:46:10,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:46:10,749 INFO L225 Difference]: With dead ends: 43 [2019-11-25 08:46:10,749 INFO L226 Difference]: Without dead ends: 18 [2019-11-25 08:46:10,752 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 08:46:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-25 08:46:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-25 08:46:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-25 08:46:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2019-11-25 08:46:10,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 11 [2019-11-25 08:46:10,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:46:10,784 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-25 08:46:10,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-25 08:46:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2019-11-25 08:46:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-25 08:46:10,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:46:10,785 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:46:10,786 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:46:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:46:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2143092324, now seen corresponding path program 1 times [2019-11-25 08:46:10,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:46:10,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446718752] [2019-11-25 08:46:10,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:46:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:46:10,880 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:46:10,880 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:46:10,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:46:10 BoogieIcfgContainer [2019-11-25 08:46:10,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:46:10,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:46:10,910 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:46:10,910 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:46:10,910 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:46:10" (3/4) ... [2019-11-25 08:46:10,913 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:46:10,950 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e9b307f5-ec75-47b1-b3f5-77750d0f4979/bin/uautomizer/witness.graphml [2019-11-25 08:46:10,950 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:46:10,952 INFO L168 Benchmark]: Toolchain (without parser) took 1524.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -137.4 MB). Peak memory consumption was 19.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:10,953 INFO L168 Benchmark]: CDTParser took 0.23 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 08:46:10,953 INFO L168 Benchmark]: CACSL2BoogieTranslator took 450.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:10,954 INFO L168 Benchmark]: Boogie Procedure Inliner took 71.35 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 08:46:10,954 INFO L168 Benchmark]: Boogie Preprocessor took 49.96 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 08:46:10,955 INFO L168 Benchmark]: RCFGBuilder took 482.36 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:10,955 INFO L168 Benchmark]: TraceAbstraction took 425.72 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2019-11-25 08:46:10,956 INFO L168 Benchmark]: Witness Printer took 40.61 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 08:46:10,959 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 450.31 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 942.0 MB in the beginning and 1.1 GB in the end (delta: -197.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 71.35 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 49.96 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 482.36 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: 27.7 MB). Peak memory consumption was 27.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 425.72 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: 26.8 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * Witness Printer took 40.61 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: 998]: 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 = ((void*)0) [L988] head->prev = ((void*)0) [L989] COND TRUE __VERIFIER_nondet_int() [L989] head->data = 2 [L989] head->opt = malloc(sizeof(SLL)) [L989] EXPR head->opt [L989] head->opt->next = ((void*)0) [L990] SLL* x = head; [L992] COND FALSE !(__VERIFIER_nondet_int()) [L995] x = head [L996] COND TRUE x != ((void*)0) [L998] EXPR x->data [L998] EXPR x->data == 2 && x->opt == x [L998] EXPR x->opt [L998] EXPR x->data == 2 && x->opt == x [L998] COND TRUE !(x->data == 2 && x->opt == x) [L998] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...