./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-circular-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-circular-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan --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 6ca87716ddde5218a0bb0d9c4d67f4e1c636cb2c .......................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:12:34,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:12:34,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:12:34,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:12:34,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:12:34,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:12:34,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:12:34,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:12:34,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:12:34,312 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:12:34,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:12:34,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:12:34,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:12:34,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:12:34,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:12:34,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:12:34,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:12:34,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:12:34,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:12:34,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:12:34,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:12:34,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:12:34,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:12:34,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:12:34,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:12:34,334 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:12:34,335 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:12:34,336 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:12:34,336 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:12:34,337 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:12:34,338 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:12:34,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:12:34,339 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:12:34,340 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:12:34,341 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:12:34,341 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:12:34,342 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:12:34,342 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:12:34,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:12:34,343 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:12:34,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:12:34,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 11:12:34,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:12:34,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:12:34,368 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:12:34,368 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:12:34,368 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:12:34,368 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:12:34,368 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:12:34,368 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:12:34,369 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:12:34,369 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:12:34,369 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:12:34,369 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:12:34,369 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:12:34,369 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:12:34,370 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:12:34,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:12:34,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 11:12:34,372 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:12:34,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:12:34,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 11:12:34,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:12:34,372 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 11:12:34,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:12:34,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:12:34,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:12:34,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:12:34,373 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:12:34,373 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:12:34,374 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ca87716ddde5218a0bb0d9c4d67f4e1c636cb2c [2020-12-09 11:12:34,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:12:34,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:12:34,596 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:12:34,597 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:12:34,597 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:12:34,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/../../sv-benchmarks/c/forester-heap/sll-circular-2.i [2020-12-09 11:12:34,637 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/data/d1f6931e2/5e290740c5ef464abd0a29c9d1583938/FLAGb89233a5e [2020-12-09 11:12:35,072 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:12:35,073 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i [2020-12-09 11:12:35,082 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/data/d1f6931e2/5e290740c5ef464abd0a29c9d1583938/FLAGb89233a5e [2020-12-09 11:12:35,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/data/d1f6931e2/5e290740c5ef464abd0a29c9d1583938 [2020-12-09 11:12:35,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:12:35,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:12:35,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:12:35,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:12:35,097 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:12:35,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa5701e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35, skipping insertion in model container [2020-12-09 11:12:35,099 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:12:35,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:12:35,304 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337] [2020-12-09 11:12:35,308 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443] [2020-12-09 11:12:35,309 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567] [2020-12-09 11:12:35,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:12:35,318 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:12:35,343 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22324,22337] [2020-12-09 11:12:35,344 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22430,22443] [2020-12-09 11:12:35,345 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/sv-benchmarks/c/forester-heap/sll-circular-2.i[22554,22567] [2020-12-09 11:12:35,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:12:35,384 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:12:35,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35 WrapperNode [2020-12-09 11:12:35,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:12:35,386 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:12:35,386 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:12:35,386 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:12:35,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,403 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:12:35,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:12:35,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:12:35,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:12:35,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... [2020-12-09 11:12:35,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:12:35,451 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:12:35,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:12:35,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:12:35,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:12:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 11:12:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 11:12:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:12:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 11:12:35,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:12:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 11:12:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 11:12:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:12:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:12:35,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:12:35,757 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:12:35,757 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 11:12:35,758 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:12:35 BoogieIcfgContainer [2020-12-09 11:12:35,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:12:35,760 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:12:35,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:12:35,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:12:35,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:12:35" (1/3) ... [2020-12-09 11:12:35,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ea62d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:12:35, skipping insertion in model container [2020-12-09 11:12:35,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:12:35" (2/3) ... [2020-12-09 11:12:35,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ea62d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:12:35, skipping insertion in model container [2020-12-09 11:12:35,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:12:35" (3/3) ... [2020-12-09 11:12:35,764 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2020-12-09 11:12:35,774 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:12:35,776 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-09 11:12:35,783 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-09 11:12:35,802 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:12:35,802 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 11:12:35,802 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:12:35,802 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:12:35,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:12:35,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:12:35,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:12:35,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:12:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-09 11:12:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:12:35,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:12:35,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:12:35,818 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:12:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:12:35,824 INFO L82 PathProgramCache]: Analyzing trace with hash 147457697, now seen corresponding path program 1 times [2020-12-09 11:12:35,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:12:35,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943696860] [2020-12-09 11:12:35,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:12:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:12:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:12:35,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943696860] [2020-12-09 11:12:35,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:12:35,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:12:35,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479899429] [2020-12-09 11:12:35,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:12:35,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:12:35,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:12:35,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:12:35,955 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-12-09 11:12:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:12:35,966 INFO L93 Difference]: Finished difference Result 57 states and 91 transitions. [2020-12-09 11:12:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:12:35,967 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 11:12:35,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:12:35,973 INFO L225 Difference]: With dead ends: 57 [2020-12-09 11:12:35,973 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 11:12:35,975 INFO L677 BasicCegarLoop]: 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 [2020-12-09 11:12:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 11:12:35,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-09 11:12:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 11:12:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 11:12:35,999 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 5 [2020-12-09 11:12:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:12:35,999 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 11:12:35,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:12:35,999 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 11:12:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:12:35,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:12:36,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:12:36,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:12:36,000 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:12:36,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:12:36,001 INFO L82 PathProgramCache]: Analyzing trace with hash 235252948, now seen corresponding path program 1 times [2020-12-09 11:12:36,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:12:36,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440590383] [2020-12-09 11:12:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:12:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:12:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:12:36,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440590383] [2020-12-09 11:12:36,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:12:36,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:12:36,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237319494] [2020-12-09 11:12:36,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:12:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:12:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:12:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:12:36,109 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 4 states. [2020-12-09 11:12:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:12:36,171 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-12-09 11:12:36,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:12:36,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 11:12:36,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:12:36,172 INFO L225 Difference]: With dead ends: 39 [2020-12-09 11:12:36,172 INFO L226 Difference]: Without dead ends: 35 [2020-12-09 11:12:36,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:12:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-09 11:12:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-12-09 11:12:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 11:12:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2020-12-09 11:12:36,178 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2020-12-09 11:12:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:12:36,178 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2020-12-09 11:12:36,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:12:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2020-12-09 11:12:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 11:12:36,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:12:36,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:12:36,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:12:36,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:12:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:12:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash -286379292, now seen corresponding path program 1 times [2020-12-09 11:12:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:12:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568516318] [2020-12-09 11:12:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:12:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:12:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:12:36,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568516318] [2020-12-09 11:12:36,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:12:36,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:12:36,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467970134] [2020-12-09 11:12:36,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 11:12:36,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:12:36,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 11:12:36,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:12:36,226 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 3 states. [2020-12-09 11:12:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:12:36,245 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-12-09 11:12:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 11:12:36,245 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-09 11:12:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:12:36,247 INFO L225 Difference]: With dead ends: 67 [2020-12-09 11:12:36,248 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 11:12:36,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 11:12:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 11:12:36,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2020-12-09 11:12:36,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 11:12:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2020-12-09 11:12:36,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 9 [2020-12-09 11:12:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:12:36,255 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2020-12-09 11:12:36,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 11:12:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2020-12-09 11:12:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 11:12:36,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:12:36,256 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:12:36,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:12:36,256 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 11:12:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:12:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1137918744, now seen corresponding path program 1 times [2020-12-09 11:12:36,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:12:36,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899262750] [2020-12-09 11:12:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:12:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:12:36,284 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:12:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:12:36,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:12:36,332 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:12:36,332 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:12:36,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:12:36,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:12:36 BoogieIcfgContainer [2020-12-09 11:12:36,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:12:36,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:12:36,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:12:36,350 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:12:36,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:12:35" (3/4) ... [2020-12-09 11:12:36,352 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 11:12:36,377 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d6dd20e4-3761-46be-a12f-7b2a9177f32a/bin/utaipan/witness.graphml [2020-12-09 11:12:36,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:12:36,379 INFO L168 Benchmark]: Toolchain (without parser) took 1283.99 ms. Allocated memory was 71.3 MB in the beginning and 140.5 MB in the end (delta: 69.2 MB). Free memory was 30.5 MB in the beginning and 50.8 MB in the end (delta: -20.3 MB). Peak memory consumption was 47.6 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,379 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:12:36,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.09 ms. Allocated memory was 71.3 MB in the beginning and 140.5 MB in the end (delta: 69.2 MB). Free memory was 30.3 MB in the beginning and 102.6 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,380 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 100.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,380 INFO L168 Benchmark]: Boogie Preprocessor took 28.80 ms. Allocated memory is still 140.5 MB. Free memory was 100.5 MB in the beginning and 99.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:12:36,380 INFO L168 Benchmark]: RCFGBuilder took 307.08 ms. Allocated memory is still 140.5 MB. Free memory was 99.1 MB in the beginning and 100.1 MB in the end (delta: -997.4 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,381 INFO L168 Benchmark]: TraceAbstraction took 590.24 ms. Allocated memory is still 140.5 MB. Free memory was 99.1 MB in the beginning and 52.9 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,381 INFO L168 Benchmark]: Witness Printer took 27.33 ms. Allocated memory is still 140.5 MB. Free memory was 52.9 MB in the beginning and 50.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:12:36,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory is still 47.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 290.09 ms. Allocated memory was 71.3 MB in the beginning and 140.5 MB in the end (delta: 69.2 MB). Free memory was 30.3 MB in the beginning and 102.6 MB in the end (delta: -72.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.75 ms. Allocated memory is still 140.5 MB. Free memory was 102.6 MB in the beginning and 100.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.80 ms. Allocated memory is still 140.5 MB. Free memory was 100.5 MB in the beginning and 99.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 307.08 ms. Allocated memory is still 140.5 MB. Free memory was 99.1 MB in the beginning and 100.1 MB in the end (delta: -997.4 kB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 590.24 ms. Allocated memory is still 140.5 MB. Free memory was 99.1 MB in the beginning and 52.9 MB in the end (delta: 46.1 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. * Witness Printer took 27.33 ms. Allocated memory is still 140.5 MB. Free memory was 52.9 MB in the beginning and 50.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1032]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = head [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int state = 1; [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x->data = state [L1027] EXPR head->next [L1027] x = head->next [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND TRUE x->data != 0 [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data [L1032] EXPR x->data [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data [L1032] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1032] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 40 SDslu, 42 SDs, 0 SdLazy, 32 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, 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, 3 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 439 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! Received shutdown request...