./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-properties/alternating_list-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/alternating_list-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-MemCleanup-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f533383f211897ea0c402e211f6c19321d99a2ee7c27b850c3f29a2cf1ec1863 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:56:34,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:56:34,286 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-MemCleanup-32bit-Kojak_Default.epf [2023-12-02 20:56:34,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:56:34,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-12-02 20:56:34,315 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:56:34,316 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 20:56:34,316 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 20:56:34,317 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:56:34,317 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:56:34,318 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:56:34,319 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:56:34,319 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:56:34,319 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:56:34,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:56:34,320 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 20:56:34,321 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 20:56:34,321 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:56:34,322 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:56:34,322 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 20:56:34,323 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:56:34,323 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:56:34,324 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:56:34,325 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-12-02 20:56:34,325 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-12-02 20:56:34,325 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-12-02 20:56:34,326 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:56:34,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 20:56:34,327 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:56:34,327 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:56:34,328 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-12-02 20:56:34,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:56:34,328 INFO L153 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_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f533383f211897ea0c402e211f6c19321d99a2ee7c27b850c3f29a2cf1ec1863 [2023-12-02 20:56:34,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:56:34,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:56:34,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:56:34,586 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:56:34,587 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:56:34,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/../../sv-benchmarks/c/list-properties/alternating_list-2.i [2023-12-02 20:56:37,363 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:56:37,608 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:56:37,609 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/sv-benchmarks/c/list-properties/alternating_list-2.i [2023-12-02 20:56:37,621 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/data/e6dc10292/592775c747db456cb5b704e63253ddd7/FLAGac9f8814c [2023-12-02 20:56:37,633 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/data/e6dc10292/592775c747db456cb5b704e63253ddd7 [2023-12-02 20:56:37,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:56:37,636 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:56:37,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:56:37,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:56:37,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:56:37,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:56:37" (1/1) ... [2023-12-02 20:56:37,643 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@591a53c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:37, skipping insertion in model container [2023-12-02 20:56:37,643 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:56:37" (1/1) ... [2023-12-02 20:56:37,686 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:56:37,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:56:37,944 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:56:37,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:56:38,021 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:56:38,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38 WrapperNode [2023-12-02 20:56:38,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:56:38,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:56:38,023 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:56:38,023 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:56:38,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,043 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,064 INFO L138 Inliner]: procedures = 124, calls = 24, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2023-12-02 20:56:38,064 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:56:38,065 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:56:38,065 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:56:38,065 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:56:38,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,074 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,090 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,092 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,095 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:56:38,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:56:38,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:56:38,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:56:38,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-02 20:56:38,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/z3 [2023-12-02 20:56:38,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-12-02 20:56:38,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-12-02 20:56:38,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 20:56:38,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 20:56:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:56:38,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:56:38,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:56:38,275 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:56:38,278 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:56:38,437 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:56:38,478 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:56:38,479 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 20:56:38,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:56:38 BoogieIcfgContainer [2023-12-02 20:56:38,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:56:38,482 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-12-02 20:56:38,482 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-12-02 20:56:38,494 INFO L274 PluginConnector]: CodeCheck initialized [2023-12-02 20:56:38,494 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:56:38" (1/1) ... [2023-12-02 20:56:38,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:56:38,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 26 states and 37 transitions. [2023-12-02 20:56:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 37 transitions. [2023-12-02 20:56:38,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:56:38,567 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:56:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:56:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 26 states and 33 transitions. [2023-12-02 20:56:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-12-02 20:56:38,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 20:56:38,759 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:38,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:56:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:56:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 30 states and 39 transitions. [2023-12-02 20:56:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-12-02 20:56:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 20:56:39,071 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:39,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:56:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:56:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 40 states and 55 transitions. [2023-12-02 20:56:39,625 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2023-12-02 20:56:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:56:39,628 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:39,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:56:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:56:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 45 states and 63 transitions. [2023-12-02 20:56:40,467 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2023-12-02 20:56:40,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 20:56:40,468 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:40,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:56:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:56:42,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-02 20:56:42,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 53 states and 83 transitions. [2023-12-02 20:56:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 83 transitions. [2023-12-02 20:56:42,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 20:56:42,506 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-02 20:56:42,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:56:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:56:42,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 20:56:42,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:56:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:56:42,602 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 20:56:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 20:56:42,633 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 6 iterations. [2023-12-02 20:56:42,659 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated [2023-12-02 20:56:42,660 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem8 could not be translated [2023-12-02 20:56:42,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 02.12 08:56:42 ImpRootNode [2023-12-02 20:56:42,665 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-12-02 20:56:42,666 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 20:56:42,666 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 20:56:42,666 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 20:56:42,666 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:56:38" (3/4) ... [2023-12-02 20:56:42,667 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-02 20:56:42,673 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated [2023-12-02 20:56:42,674 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem8 could not be translated [2023-12-02 20:56:42,713 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/witness.graphml [2023-12-02 20:56:42,713 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 20:56:42,714 INFO L158 Benchmark]: Toolchain (without parser) took 5077.54ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 126.3MB in the beginning and 144.2MB in the end (delta: -17.8MB). Peak memory consumption was 17.8MB. Max. memory is 16.1GB. [2023-12-02 20:56:42,715 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 70.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:56:42,715 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.22ms. Allocated memory is still 161.5MB. Free memory was 125.8MB in the beginning and 108.9MB in the end (delta: 16.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 20:56:42,716 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.10ms. Allocated memory is still 161.5MB. Free memory was 108.9MB in the beginning and 106.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 20:56:42,716 INFO L158 Benchmark]: Boogie Preprocessor took 29.76ms. Allocated memory is still 161.5MB. Free memory was 106.9MB in the beginning and 105.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:56:42,717 INFO L158 Benchmark]: RCFGBuilder took 385.30ms. Allocated memory is still 161.5MB. Free memory was 105.4MB in the beginning and 89.6MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 20:56:42,717 INFO L158 Benchmark]: CodeCheck took 4183.09ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 89.6MB in the beginning and 146.9MB in the end (delta: -57.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:56:42,718 INFO L158 Benchmark]: Witness Printer took 47.96ms. Allocated memory is still 195.0MB. Free memory was 146.9MB in the beginning and 144.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:56:42,720 INFO L338 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, 26 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 4.1s, OverallIterations: 6, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 282 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 72 mSDsluCounter, 171 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 52 mSDsCounter, 83 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 349 IncrementalHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 83 mSolverCounterUnsat, 119 mSDtfsCounter, 349 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 526 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3165 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 277 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; VAL [a={-2:0}, flag=1, p={-2:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 VAL [a={-2:0}, flag=1, p={-2:0}, t={-1:0}] [L553] EXPR p->h VAL [a={-2:0}, flag=1, p={-2:0}, t={-1:0}] [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h VAL [a={-2:0}, flag=0, p={-2:0}, t={-1:0}] [L556] COND TRUE p->h != 1 [L573] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "alternating_list-2.c", 3, __extension__ __PRETTY_FUNCTION__) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 115.3MB. Free memory is still 70.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.22ms. Allocated memory is still 161.5MB. Free memory was 125.8MB in the beginning and 108.9MB in the end (delta: 16.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.10ms. Allocated memory is still 161.5MB. Free memory was 108.9MB in the beginning and 106.9MB in the end (delta: 2.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.76ms. Allocated memory is still 161.5MB. Free memory was 106.9MB in the beginning and 105.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 385.30ms. Allocated memory is still 161.5MB. Free memory was 105.4MB in the beginning and 89.6MB in the end (delta: 15.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 4183.09ms. Allocated memory was 161.5MB in the beginning and 195.0MB in the end (delta: 33.6MB). Free memory was 89.6MB in the beginning and 146.9MB in the end (delta: -57.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 47.96ms. Allocated memory is still 195.0MB. Free memory was 146.9MB in the beginning and 144.2MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem8 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem8 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. RESULT: Ultimate proved your program to be incorrect! [2023-12-02 20:56:42,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3c746b91-7ae0-47ac-95eb-a45fdb9e824a/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)