./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4817866b64d47a0885045d682a213ce065b00b0f ........................................................................................................................................................................................................................................ 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 0.2.0-a4ecdab [2020-11-29 18:23:25,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:23:25,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:23:25,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:23:25,090 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:23:25,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:23:25,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:23:25,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:23:25,116 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:23:25,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:23:25,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:23:25,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:23:25,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:23:25,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:23:25,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:23:25,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:23:25,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:23:25,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:23:25,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:23:25,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:23:25,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:23:25,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:23:25,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:23:25,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:23:25,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:23:25,179 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:23:25,180 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:23:25,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:23:25,183 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:23:25,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:23:25,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:23:25,186 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:23:25,188 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:23:25,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:23:25,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:23:25,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:23:25,193 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:23:25,193 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:23:25,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:23:25,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:23:25,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:23:25,202 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2020-11-29 18:23:25,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:23:25,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:23:25,243 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-29 18:23:25,243 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2020-11-29 18:23:25,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:23:25,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:23:25,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:23:25,245 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:23:25,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:23:25,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:23:25,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:23:25,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 18:23:25,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 18:23:25,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 18:23:25,247 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:23:25,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:23:25,247 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:23:25,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 18:23:25,248 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2020-11-29 18:23:25,248 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2020-11-29 18:23:25,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:23:25,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 18:23:25,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2020-11-29 18:23:25,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:23:25,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 18:23:25,249 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 18:23:25,250 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2020-11-29 18:23:25,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 18:23:25,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 18:23:25,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4817866b64d47a0885045d682a213ce065b00b0f [2020-11-29 18:23:25,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:23:25,597 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:23:25,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:23:25,604 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:23:25,606 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:23:25,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/../../sv-benchmarks/c/forester-heap/sll-optional-2.i [2020-11-29 18:23:25,675 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/data/35ed6ee2a/f48a2605912d4718abe033e5a2b6c01b/FLAG91fb1cc35 [2020-11-29 18:23:26,260 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:23:26,261 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/sv-benchmarks/c/forester-heap/sll-optional-2.i [2020-11-29 18:23:26,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/data/35ed6ee2a/f48a2605912d4718abe033e5a2b6c01b/FLAG91fb1cc35 [2020-11-29 18:23:26,540 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/data/35ed6ee2a/f48a2605912d4718abe033e5a2b6c01b [2020-11-29 18:23:26,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:23:26,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:23:26,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:23:26,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:23:26,551 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:23:26,552 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:26" (1/1) ... [2020-11-29 18:23:26,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b00d7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:26, skipping insertion in model container [2020-11-29 18:23:26,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:23:26" (1/1) ... [2020-11-29 18:23:26,568 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:23:26,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:23:26,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:23:26,970 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:23:27,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:23:27,067 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:23:27,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27 WrapperNode [2020-11-29 18:23:27,068 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:23:27,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:23:27,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:23:27,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:23:27,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,118 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:23:27,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:23:27,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:23:27,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:23:27,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,134 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,149 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... [2020-11-29 18:23:27,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:23:27,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:23:27,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:23:27,154 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:23:27,155 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:23:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (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:10000 [2020-11-29 18:23:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 18:23:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 18:23:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 18:23:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 18:23:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:23:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 18:23:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 18:23:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:23:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:23:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:23:28,645 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:23:28,645 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-29 18:23:28,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:28 BoogieIcfgContainer [2020-11-29 18:23:28,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:23:28,651 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2020-11-29 18:23:28,652 INFO L271 PluginConnector]: Initializing CodeCheck... [2020-11-29 18:23:28,664 INFO L275 PluginConnector]: CodeCheck initialized [2020-11-29 18:23:28,665 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:28" (1/1) ... [2020-11-29 18:23:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:23:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 18:23:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 15 states and 22 transitions. [2020-11-29 18:23:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 22 transitions. [2020-11-29 18:23:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 18:23:28,731 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 18:23:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:23:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:23:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2020-11-29 18:23:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 14 states and 16 transitions. [2020-11-29 18:23:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-29 18:23:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 18:23:28,964 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2020-11-29 18:23:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:23:29,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:23:29,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:23:29,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:23:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:23:29,450 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:23:29,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:23:29,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:23:29,535 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2020-11-29 18:23:29,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 29.11 06:23:29 ImpRootNode [2020-11-29 18:23:29,587 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2020-11-29 18:23:29,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:23:29,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:23:29,589 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:23:29,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:23:28" (3/4) ... [2020-11-29 18:23:29,592 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 18:23:29,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e62aba54-5fd3-4a23-a338-179e4e39b210/bin/ukojak/witness.graphml [2020-11-29 18:23:29,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:23:29,673 INFO L168 Benchmark]: Toolchain (without parser) took 3127.29 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 61.0 MB in the beginning and 60.9 MB in the end (delta: 103.9 kB). Peak memory consumption was 24.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,677 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 48.5 MB in the beginning and 48.4 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:23:29,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 521.11 ms. Allocated memory is still 92.3 MB. Free memory was 61.0 MB in the beginning and 58.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.05 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 55.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,685 INFO L168 Benchmark]: Boogie Preprocessor took 33.22 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,686 INFO L168 Benchmark]: RCFGBuilder took 1496.65 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 54.1 MB in the beginning and 61.0 MB in the end (delta: -6.9 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,687 INFO L168 Benchmark]: CodeCheck took 937.37 ms. Allocated memory is still 117.4 MB. Free memory was 61.0 MB in the beginning and 63.0 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:23:29,688 INFO L168 Benchmark]: Witness Printer took 81.84 ms. Allocated memory is still 117.4 MB. Free memory was 63.0 MB in the beginning and 60.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 18:23:29,696 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - CounterExampleResult [Line: 985]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) [L998] COND FALSE !(__VERIFIER_nondet_int()) [L998] COND FALSE !(__VERIFIER_nondet_int()) [L998] head->data = 0 [L998] head->opt = head [L999] SLL* x = head; [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1004] x = head [L1005] COND TRUE x != ((void*)0) [L1007] EXPR x->data [L1007] EXPR x->data == 2 && x->opt == x [L1007] COND TRUE !(x->data == 2 && x->opt == x) [L985] COND FALSE !(0) [L985] __assert_fail ("0", "sll-optional-2.c", 16, __extension__ __PRETTY_FUNCTION__) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 92.3 MB. Free memory was 48.5 MB in the beginning and 48.4 MB in the end (delta: 34.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 521.11 ms. Allocated memory is still 92.3 MB. Free memory was 61.0 MB in the beginning and 58.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.05 ms. Allocated memory is still 92.3 MB. Free memory was 58.0 MB in the beginning and 55.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.22 ms. Allocated memory is still 92.3 MB. Free memory was 55.9 MB in the beginning and 54.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1496.65 ms. Allocated memory was 92.3 MB in the beginning and 117.4 MB in the end (delta: 25.2 MB). Free memory was 54.1 MB in the beginning and 61.0 MB in the end (delta: -6.9 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. * CodeCheck took 937.37 ms. Allocated memory is still 117.4 MB. Free memory was 61.0 MB in the beginning and 63.0 MB in the end (delta: -1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 81.84 ms. Allocated memory is still 117.4 MB. Free memory was 63.0 MB in the beginning and 60.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...