./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 f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/config/KojakReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak --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 Kojak --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 0.1.25-f470102 [2019-12-01 11:55:37,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-01 11:55:37,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-01 11:55:37,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-01 11:55:37,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-01 11:55:37,392 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-01 11:55:37,393 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-01 11:55:37,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-01 11:55:37,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-01 11:55:37,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-01 11:55:37,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-01 11:55:37,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-01 11:55:37,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-01 11:55:37,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-01 11:55:37,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-01 11:55:37,400 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-01 11:55:37,400 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-01 11:55:37,401 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-01 11:55:37,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-01 11:55:37,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-01 11:55:37,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-01 11:55:37,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-01 11:55:37,406 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-01 11:55:37,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-01 11:55:37,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-01 11:55:37,408 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-01 11:55:37,408 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-01 11:55:37,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-01 11:55:37,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-01 11:55:37,410 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-01 11:55:37,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-01 11:55:37,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-01 11:55:37,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-01 11:55:37,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-01 11:55:37,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-01 11:55:37,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-01 11:55:37,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-01 11:55:37,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-01 11:55:37,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-01 11:55:37,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-01 11:55:37,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-01 11:55:37,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/config/svcomp-Reach-32bit-Kojak_Default.epf [2019-12-01 11:55:37,423 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-01 11:55:37,423 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-01 11:55:37,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-01 11:55:37,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2019-12-01 11:55:37,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-01 11:55:37,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-01 11:55:37,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-12-01 11:55:37,426 INFO L136 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2019-12-01 11:55:37,426 INFO L138 SettingsManager]: * Timeout in seconds=1000000 [2019-12-01 11:55:37,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2019-12-01 11:55:37,427 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Trace refinement strategy=PENGUIN [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-01 11:55:37,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-12-01 11:55:37,427 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_9375384f-4742-49ea-b605-49026fb4a7ff/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(__VERIFIER_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 -> 8409443a6b8db5c0500e3e8aa54c33463c524ec9 [2019-12-01 11:55:37,528 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-01 11:55:37,536 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-01 11:55:37,538 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-01 11:55:37,539 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-01 11:55:37,539 INFO L275 PluginConnector]: CDTParser initialized [2019-12-01 11:55:37,539 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/../../sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-12-01 11:55:37,576 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/data/10a556111/1e27bc5f972d4bea8bb1e9b2a7a4b756/FLAG629974e00 [2019-12-01 11:55:38,012 INFO L306 CDTParser]: Found 1 translation units. [2019-12-01 11:55:38,012 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/sv-benchmarks/c/forester-heap/dll-optional-2.i [2019-12-01 11:55:38,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/data/10a556111/1e27bc5f972d4bea8bb1e9b2a7a4b756/FLAG629974e00 [2019-12-01 11:55:38,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/data/10a556111/1e27bc5f972d4bea8bb1e9b2a7a4b756 [2019-12-01 11:55:38,031 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-01 11:55:38,032 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-01 11:55:38,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-01 11:55:38,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-01 11:55:38,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-01 11:55:38,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,038 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e60119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38, skipping insertion in model container [2019-12-01 11:55:38,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,043 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-01 11:55:38,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-01 11:55:38,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-01 11:55:38,298 INFO L203 MainTranslator]: Completed pre-run [2019-12-01 11:55:38,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-01 11:55:38,355 INFO L208 MainTranslator]: Completed translation [2019-12-01 11:55:38,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38 WrapperNode [2019-12-01 11:55:38,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-01 11:55:38,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-01 11:55:38,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-01 11:55:38,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-01 11:55:38,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,388 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-01 11:55:38,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-01 11:55:38,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-01 11:55:38,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-01 11:55:38,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... [2019-12-01 11:55:38,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-01 11:55:38,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-01 11:55:38,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-01 11:55:38,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-01 11:55:38,410 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 11:55:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/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 [2019-12-01 11:55:38,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-01 11:55:38,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-01 11:55:38,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-01 11:55:39,184 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-01 11:55:39,184 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-01 11:55:39,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:55:39 BoogieIcfgContainer [2019-12-01 11:55:39,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-01 11:55:39,186 INFO L113 PluginConnector]: ------------------------CodeCheck---------------------------- [2019-12-01 11:55:39,186 INFO L271 PluginConnector]: Initializing CodeCheck... [2019-12-01 11:55:39,194 INFO L275 PluginConnector]: CodeCheck initialized [2019-12-01 11:55:39,194 INFO L185 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:55:39" (1/1) ... [2019-12-01 11:55:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-01 11:55:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-12-01 11:55:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 13 states and 19 transitions. [2019-12-01 11:55:39,223 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 19 transitions. [2019-12-01 11:55:39,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-01 11:55:39,225 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-12-01 11:55:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-01 11:55:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-01 11:55:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2019-12-01 11:55:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 13 states and 15 transitions. [2019-12-01 11:55:39,348 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-12-01 11:55:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-12-01 11:55:39,348 INFO L428 CodeCheckObserver]: Error Path is FOUND. [2019-12-01 11:55:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-01 11:55:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-01 11:55:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-01 11:55:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-01 11:55:39,691 WARN L483 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2019-12-01 11:55:39,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 01.12 11:55:39 ImpRootNode [2019-12-01 11:55:39,715 INFO L132 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2019-12-01 11:55:39,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-01 11:55:39,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-01 11:55:39,715 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-01 11:55:39,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 11:55:39" (3/4) ... [2019-12-01 11:55:39,718 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-01 11:55:39,754 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9375384f-4742-49ea-b605-49026fb4a7ff/bin/ukojak/witness.graphml [2019-12-01 11:55:39,754 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-01 11:55:39,756 INFO L168 Benchmark]: Toolchain (without parser) took 1723.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 940.7 MB in the beginning and 975.7 MB in the end (delta: -35.0 MB). Peak memory consumption was 67.7 MB. Max. memory is 11.5 GB. [2019-12-01 11:55:39,756 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-01 11:55:39,757 INFO L168 Benchmark]: CACSL2BoogieTranslator took 322.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-12-01 11:55:39,758 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-01 11:55:39,758 INFO L168 Benchmark]: Boogie Preprocessor took 20.89 ms. Allocated memory is still 1.1 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. [2019-12-01 11:55:39,759 INFO L168 Benchmark]: RCFGBuilder took 776.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 11.5 GB. [2019-12-01 11:55:39,759 INFO L168 Benchmark]: CodeCheck took 528.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 981.1 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. [2019-12-01 11:55:39,760 INFO L168 Benchmark]: Witness Printer took 39.38 ms. Allocated memory is still 1.1 GB. Free memory was 981.1 MB in the beginning and 975.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-12-01 11:55:39,763 INFO L335 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, 13 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 0, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 12 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 48 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, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 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: 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() * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 322.75 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.8 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -146.0 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 31.78 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 20.89 ms. Allocated memory is still 1.1 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 776.84 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 62.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 11.5 GB. * CodeCheck took 528.71 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 981.1 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. * Witness Printer took 39.38 ms. Allocated memory is still 1.1 GB. Free memory was 981.1 MB in the beginning and 975.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...