./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 8393723b 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_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-optional-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8287e6117d458104c3f33a0e7a83f771b50c3974e23296edc32c92f0b8cae546 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:57:19,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:19,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:19,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:19,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:19,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:19,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:19,506 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:19,518 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:19,519 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:19,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:19,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:19,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:19,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:19,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:19,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:19,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:19,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:19,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:19,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:19,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:19,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:19,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:19,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:19,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:19,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:19,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:19,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:19,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:19,574 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:19,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:19,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:19,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:19,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:19,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:19,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:19,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:19,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:19,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:19,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:19,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:19,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:57:19,632 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:19,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:19,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:19,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:19,634 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:19,635 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:19,635 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:19,635 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:19,635 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:19,636 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:57:19,637 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:19,637 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:19,637 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:57:19,638 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:57:19,638 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:19,638 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:57:19,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:57:19,639 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:57:19,639 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:19,640 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:19,640 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:19,640 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:19,640 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:19,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:57:19,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:19,642 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:57:19,643 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:19,643 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:57:19,643 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:19,643 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:57:19,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:19,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:19,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:19,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:19,645 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:57:19,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:19,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:57:19,646 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:57:19,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:57:19,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:57:19,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:19,647 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8287e6117d458104c3f33a0e7a83f771b50c3974e23296edc32c92f0b8cae546 [2022-11-19 07:57:19,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:19,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:19,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:19,959 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:19,960 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:19,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/forester-heap/dll-optional-2.i [2022-11-19 07:57:20,042 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/data/b7e3f38ab/7f104a4ddad74ceb896f82021a15e10a/FLAG62a3c1042 [2022-11-19 07:57:20,663 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:20,663 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/sv-benchmarks/c/forester-heap/dll-optional-2.i [2022-11-19 07:57:20,678 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/data/b7e3f38ab/7f104a4ddad74ceb896f82021a15e10a/FLAG62a3c1042 [2022-11-19 07:57:20,985 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/data/b7e3f38ab/7f104a4ddad74ceb896f82021a15e10a [2022-11-19 07:57:20,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:57:20,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:57:20,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:20,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:57:21,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:57:21,006 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:20" (1/1) ... [2022-11-19 07:57:21,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cad3324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21, skipping insertion in model container [2022-11-19 07:57:21,008 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:20" (1/1) ... [2022-11-19 07:57:21,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:57:21,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:57:21,507 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/sv-benchmarks/c/forester-heap/dll-optional-2.i[22706,22719] [2022-11-19 07:57:21,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:21,534 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:57:21,586 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/sv-benchmarks/c/forester-heap/dll-optional-2.i[22706,22719] [2022-11-19 07:57:21,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:21,626 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:57:21,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21 WrapperNode [2022-11-19 07:57:21,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:21,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:21,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:57:21,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:57:21,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,703 INFO L138 Inliner]: procedures = 119, calls = 41, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 115 [2022-11-19 07:57:21,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:21,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:57:21,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:57:21,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:57:21,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,726 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,749 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,755 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:57:21,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:57:21,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:57:21,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:57:21,775 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (1/1) ... [2022-11-19 07:57:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:21,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:21,810 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:57:21,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:57:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:57:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:57:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:57:21,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:57:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:57:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:57:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:57:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:57:21,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:57:21,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:57:22,008 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:57:22,010 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:57:22,396 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:57:22,592 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:57:22,601 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-19 07:57:22,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:22 BoogieIcfgContainer [2022-11-19 07:57:22,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:57:22,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:57:22,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:57:22,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:57:22,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:20" (1/3) ... [2022-11-19 07:57:22,612 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b86efbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:22, skipping insertion in model container [2022-11-19 07:57:22,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:21" (2/3) ... [2022-11-19 07:57:22,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b86efbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:22, skipping insertion in model container [2022-11-19 07:57:22,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:22" (3/3) ... [2022-11-19 07:57:22,615 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-optional-2.i [2022-11-19 07:57:22,635 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:57:22,636 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:57:22,703 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:57:22,712 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@667bcaf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:57:22,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:57:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:22,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:57:22,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:22,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:22,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:22,733 INFO L85 PathProgramCache]: Analyzing trace with hash -696609773, now seen corresponding path program 1 times [2022-11-19 07:57:22,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:22,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324650052] [2022-11-19 07:57:22,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:22,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:57:22,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:22,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324650052] [2022-11-19 07:57:22,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324650052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:22,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:22,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:57:22,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414773310] [2022-11-19 07:57:22,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:22,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:57:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:57:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:57:23,022 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:23,292 INFO L93 Difference]: Finished difference Result 23 states and 33 transitions. [2022-11-19 07:57:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:57:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:57:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:23,304 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:57:23,305 INFO L226 Difference]: Without dead ends: 11 [2022-11-19 07:57:23,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:57:23,312 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:23,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:57:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-19 07:57:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-19 07:57:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2022-11-19 07:57:23,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2022-11-19 07:57:23,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:23,345 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2022-11-19 07:57:23,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:23,346 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2022-11-19 07:57:23,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 07:57:23,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:23,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:23,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:57:23,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:57:23,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash 587986925, now seen corresponding path program 1 times [2022-11-19 07:57:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930511992] [2022-11-19 07:57:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:23,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:57:23,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:57:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:57:23,687 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:57:23,688 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:57:23,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:57:23,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:57:23,696 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-19 07:57:23,699 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:57:23,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:57:23 BoogieIcfgContainer [2022-11-19 07:57:23,723 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:57:23,724 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:57:23,724 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:57:23,724 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:57:23,725 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:22" (3/4) ... [2022-11-19 07:57:23,727 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:57:23,759 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:57:23,759 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:57:23,760 INFO L158 Benchmark]: Toolchain (without parser) took 2770.56ms. Allocated memory is still 113.2MB. Free memory was 77.0MB in the beginning and 71.5MB in the end (delta: 5.5MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,761 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:57:23,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 627.73ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 81.5MB in the end (delta: -4.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 76.68ms. Allocated memory is still 113.2MB. Free memory was 81.5MB in the beginning and 79.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,763 INFO L158 Benchmark]: Boogie Preprocessor took 62.00ms. Allocated memory is still 113.2MB. Free memory was 79.4MB in the beginning and 77.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,763 INFO L158 Benchmark]: RCFGBuilder took 836.72ms. Allocated memory is still 113.2MB. Free memory was 77.8MB in the beginning and 83.4MB in the end (delta: -5.6MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,764 INFO L158 Benchmark]: TraceAbstraction took 1117.46ms. Allocated memory is still 113.2MB. Free memory was 82.7MB in the beginning and 73.6MB in the end (delta: 9.1MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,764 INFO L158 Benchmark]: Witness Printer took 35.70ms. Allocated memory is still 113.2MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:57:23,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 83.9MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 27.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 627.73ms. Allocated memory is still 113.2MB. Free memory was 76.7MB in the beginning and 81.5MB in the end (delta: -4.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 76.68ms. Allocated memory is still 113.2MB. Free memory was 81.5MB in the beginning and 79.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.00ms. Allocated memory is still 113.2MB. Free memory was 79.4MB in the beginning and 77.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 836.72ms. Allocated memory is still 113.2MB. Free memory was 77.8MB in the beginning and 83.4MB in the end (delta: -5.6MB). Peak memory consumption was 30.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1117.46ms. Allocated memory is still 113.2MB. Free memory was 82.7MB in the beginning and 73.6MB in the end (delta: 9.1MB). Peak memory consumption was 44.0MB. Max. memory is 16.1GB. * Witness Printer took 35.70ms. Allocated memory is still 113.2MB. Free memory was 73.6MB in the beginning and 71.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1009]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = ((void*)0) [L999] head->prev = ((void*)0) [L1000] COND FALSE !(__VERIFIER_nondet_int()) [L1000] COND TRUE __VERIFIER_nondet_int() [L1000] head->data = 1 [L1000] head->opt = head [L1001] SLL* x = head; VAL [head={3:0}, head->opt={52:56}, malloc(sizeof(SLL))={49:50}, x={3:0}] [L1003] COND FALSE !(__VERIFIER_nondet_int()) [L1006] x = head VAL [head={3:0}, head->opt={52:56}, malloc(sizeof(SLL))={49:50}, x={3:0}] [L1007] COND TRUE x != ((void*)0) VAL [head={3:0}, head->opt={52:56}, malloc(sizeof(SLL))={49:50}, x={3:0}] [L1009] EXPR x->data [L1009] EXPR x->data == 2 && x->opt == x VAL [head={3:0}, head->opt={52:56}, malloc(sizeof(SLL))={49:50}, x={3:0}, x->data=1, x->data == 2 && x->opt == x=0, x->opt={3:0}] [L1009] COND TRUE !(x->data == 2 && x->opt == x) [L1009] reach_error() VAL [head={3:0}, head->opt={52:56}, malloc(sizeof(SLL))={49:50}, x={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 9 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:57:23,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fb0fb21-8081-4848-9e22-1fd03c4200b2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (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