./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/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_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-03 02:47:09,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-03 02:47:10,009 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2023-12-03 02:47:10,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-03 02:47:10,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-12-03 02:47:10,033 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-03 02:47:10,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-03 02:47:10,034 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-03 02:47:10,035 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-03 02:47:10,036 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-03 02:47:10,036 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-03 02:47:10,037 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-03 02:47:10,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-03 02:47:10,038 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-03 02:47:10,038 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-03 02:47:10,039 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-03 02:47:10,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-03 02:47:10,040 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-03 02:47:10,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-03 02:47:10,041 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-03 02:47:10,041 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-12-03 02:47:10,042 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-12-03 02:47:10,042 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-12-03 02:47:10,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-03 02:47:10,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-03 02:47:10,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-03 02:47:10,044 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-03 02:47:10,044 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-12-03 02:47:10,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-03 02:47:10,045 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_fcdea973-a510-4b59-952e-41c3457e9cbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2023-12-03 02:47:10,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-03 02:47:10,311 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-03 02:47:10,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-03 02:47:10,316 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-03 02:47:10,316 INFO L274 PluginConnector]: CDTParser initialized [2023-12-03 02:47:10,318 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2023-12-03 02:47:13,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-03 02:47:13,384 INFO L384 CDTParser]: Found 1 translation units. [2023-12-03 02:47:13,385 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2023-12-03 02:47:13,394 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/data/00042ff43/57873752b87b4d90b2fe63e762eb166f/FLAG81fd1895f [2023-12-03 02:47:13,413 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/data/00042ff43/57873752b87b4d90b2fe63e762eb166f [2023-12-03 02:47:13,416 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-03 02:47:13,418 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-03 02:47:13,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-03 02:47:13,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-03 02:47:13,426 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-03 02:47:13,427 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,428 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fbac189 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13, skipping insertion in model container [2023-12-03 02:47:13,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,448 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-03 02:47:13,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-03 02:47:13,614 INFO L202 MainTranslator]: Completed pre-run [2023-12-03 02:47:13,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-03 02:47:13,644 INFO L206 MainTranslator]: Completed translation [2023-12-03 02:47:13,644 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13 WrapperNode [2023-12-03 02:47:13,645 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-03 02:47:13,646 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-03 02:47:13,646 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-03 02:47:13,646 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-03 02:47:13,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,678 INFO L138 Inliner]: procedures = 10, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 16 [2023-12-03 02:47:13,678 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-03 02:47:13,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-03 02:47:13,679 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-03 02:47:13,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-03 02:47:13,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,687 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,688 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,689 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,694 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,695 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,697 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,699 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-03 02:47:13,700 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-03 02:47:13,700 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-03 02:47:13,700 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-03 02:47:13,701 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-12-03 02:47:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/z3 [2023-12-03 02:47:13,731 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-12-03 02:47:13,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-12-03 02:47:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-03 02:47:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-03 02:47:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-03 02:47:13,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-03 02:47:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-03 02:47:13,839 INFO L241 CfgBuilder]: Building ICFG [2023-12-03 02:47:13,842 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-03 02:47:13,938 INFO L282 CfgBuilder]: Performing block encoding [2023-12-03 02:47:13,963 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-03 02:47:13,963 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-03 02:47:13,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 02:47:13 BoogieIcfgContainer [2023-12-03 02:47:13,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-03 02:47:13,967 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-12-03 02:47:13,967 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-12-03 02:47:13,975 INFO L274 PluginConnector]: CodeCheck initialized [2023-12-03 02:47:13,976 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 02:47:13" (1/1) ... [2023-12-03 02:47:13,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-03 02:47:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-03 02:47:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 13 states and 12 transitions. [2023-12-03 02:47:14,032 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2023-12-03 02:47:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-12-03 02:47:14,034 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-03 02:47:14,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-03 02:47:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-03 02:47:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-03 02:47:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-03 02:47:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 12 states and 11 transitions. [2023-12-03 02:47:14,216 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2023-12-03 02:47:14,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-03 02:47:14,216 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-03 02:47:14,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-03 02:47:14,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-03 02:47:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-03 02:47:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-03 02:47:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 11 states and 10 transitions. [2023-12-03 02:47:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2023-12-03 02:47:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-03 02:47:14,377 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-03 02:47:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-03 02:47:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-03 02:47:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-03 02:47:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-12-03 02:47:14,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 10 states and 9 transitions. [2023-12-03 02:47:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2023-12-03 02:47:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-03 02:47:14,639 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-12-03 02:47:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-03 02:47:14,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-03 02:47:14,657 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-03 02:47:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-03 02:47:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-03 02:47:14,706 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-03 02:47:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-03 02:47:14,720 WARN L476 CodeCheckObserver]: This program is UNSAFE, Check terminated with 4 iterations. [2023-12-03 02:47:14,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 03.12 02:47:14 ImpRootNode [2023-12-03 02:47:14,747 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2023-12-03 02:47:14,748 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-03 02:47:14,748 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-03 02:47:14,748 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-03 02:47:14,749 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 02:47:13" (3/4) ... [2023-12-03 02:47:14,750 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-12-03 02:47:14,792 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/bin/ukojak-verify-Qdu7aM0XO9/witness.graphml [2023-12-03 02:47:14,793 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-03 02:47:14,794 INFO L158 Benchmark]: Toolchain (without parser) took 1375.75ms. Allocated memory is still 201.3MB. Free memory was 158.0MB in the beginning and 98.6MB in the end (delta: 59.4MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,794 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 201.3MB. Free memory was 163.8MB in the beginning and 163.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-03 02:47:14,795 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.80ms. Allocated memory is still 201.3MB. Free memory was 158.0MB in the beginning and 148.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,796 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.37ms. Allocated memory is still 201.3MB. Free memory was 148.2MB in the beginning and 146.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,796 INFO L158 Benchmark]: Boogie Preprocessor took 20.19ms. Allocated memory is still 201.3MB. Free memory was 146.8MB in the beginning and 146.1MB in the end (delta: 690.3kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-03 02:47:14,797 INFO L158 Benchmark]: RCFGBuilder took 265.96ms. Allocated memory is still 201.3MB. Free memory was 146.1MB in the beginning and 135.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,798 INFO L158 Benchmark]: CodeCheck took 780.05ms. Allocated memory is still 201.3MB. Free memory was 135.0MB in the beginning and 100.0MB in the end (delta: 35.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,799 INFO L158 Benchmark]: Witness Printer took 45.06ms. Allocated memory is still 201.3MB. Free memory was 100.0MB in the beginning and 98.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-03 02:47:14,802 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, 13 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 4, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 17 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35 IncrementalHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 17 mSolverCounterUnsat, 0 mSDtfsCounter, 35 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) [L12] RET freePointer(p) [L14] p[0] = 1 * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 201.3MB. Free memory was 163.8MB in the beginning and 163.8MB in the end (delta: 28.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 225.80ms. Allocated memory is still 201.3MB. Free memory was 158.0MB in the beginning and 148.2MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.37ms. Allocated memory is still 201.3MB. Free memory was 148.2MB in the beginning and 146.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.19ms. Allocated memory is still 201.3MB. Free memory was 146.8MB in the beginning and 146.1MB in the end (delta: 690.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 265.96ms. Allocated memory is still 201.3MB. Free memory was 146.1MB in the beginning and 135.0MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * CodeCheck took 780.05ms. Allocated memory is still 201.3MB. Free memory was 135.0MB in the beginning and 100.0MB in the end (delta: 35.0MB). Peak memory consumption was 35.7MB. Max. memory is 16.1GB. * Witness Printer took 45.06ms. Allocated memory is still 201.3MB. Free memory was 100.0MB in the beginning and 98.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. RESULT: Ultimate proved your program to be incorrect! [2023-12-03 02:47:14,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcdea973-a510-4b59-952e-41c3457e9cbc/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-deref)