./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test08.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test08.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI --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 3d186e704599e729d48e81eb495efdc1b4000c01 ................................................................................................................................................................................................................................................................. 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 [2021-10-11 02:29:57,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:29:57,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:29:57,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:29:57,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:29:57,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:29:57,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:29:57,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:29:57,373 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:29:57,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:29:57,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:29:57,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:29:57,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:29:57,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:29:57,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:29:57,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:29:57,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:29:57,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:29:57,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:29:57,388 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:29:57,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:29:57,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:29:57,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:29:57,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:29:57,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:29:57,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:29:57,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:29:57,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:29:57,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:29:57,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:29:57,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:29:57,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:29:57,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:29:57,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:29:57,416 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:29:57,417 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:29:57,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:29:57,418 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:29:57,418 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:29:57,419 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:29:57,420 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:29:57,421 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:29:57,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:29:57,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:29:57,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:29:57,447 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:29:57,448 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:29:57,448 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:29:57,449 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:29:57,449 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:29:57,449 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:29:57,450 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:29:57,450 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:29:57,450 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:29:57,451 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:29:57,451 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:29:57,452 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:29:57,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:29:57,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:29:57,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:29:57,454 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:29:57,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:29:57,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:29:57,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:29:57,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:29:57,455 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:29:57,455 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:29:57,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:29:57,456 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:29:57,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:29:57,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:29:57,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:29:57,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:29:57,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:29:57,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:29:57,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:29:57,458 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:29:57,458 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:29:57,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:29:57,458 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:29:57,459 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:29:57,459 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_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d186e704599e729d48e81eb495efdc1b4000c01 [2021-10-11 02:29:57,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:29:57,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:29:57,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:29:57,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:29:57,767 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:29:57,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/ldv-regression/test08.c [2021-10-11 02:29:57,869 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/data/c8dac266b/9922ec82a8c740ee8703171a28a499f5/FLAG69a635bc7 [2021-10-11 02:29:58,325 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:29:58,326 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/sv-benchmarks/c/ldv-regression/test08.c [2021-10-11 02:29:58,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/data/c8dac266b/9922ec82a8c740ee8703171a28a499f5/FLAG69a635bc7 [2021-10-11 02:29:58,713 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/data/c8dac266b/9922ec82a8c740ee8703171a28a499f5 [2021-10-11 02:29:58,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:29:58,717 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:29:58,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:58,719 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:29:58,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:29:58,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e28746c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58, skipping insertion in model container [2021-10-11 02:29:58,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,732 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:29:58,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:29:58,904 WARN L226 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_042d6179-4af1-4e8b-9947-aa53242d4ea8/sv-benchmarks/c/ldv-regression/test08.c[578,591] [2021-10-11 02:29:58,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:58,920 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:29:58,932 WARN L226 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_042d6179-4af1-4e8b-9947-aa53242d4ea8/sv-benchmarks/c/ldv-regression/test08.c[578,591] [2021-10-11 02:29:58,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:29:58,944 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:29:58,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58 WrapperNode [2021-10-11 02:29:58,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:29:58,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:58,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:29:58,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:29:58,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,966 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:29:58,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:29:58,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:29:58,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:29:58,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:58,996 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:59,000 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:59,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:59,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... [2021-10-11 02:29:59,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:29:59,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:29:59,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:29:59,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:29:59,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:29:59,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:29:59,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:29:59,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:29:59,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:29:59,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:29:59,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:29:59,557 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:29:59,557 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:29:59,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:59 BoogieIcfgContainer [2021-10-11 02:29:59,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:29:59,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:29:59,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:29:59,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:29:59,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:29:58" (1/3) ... [2021-10-11 02:29:59,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbe75de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:59, skipping insertion in model container [2021-10-11 02:29:59,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:29:58" (2/3) ... [2021-10-11 02:29:59,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fbe75de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:29:59, skipping insertion in model container [2021-10-11 02:29:59,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:59" (3/3) ... [2021-10-11 02:29:59,568 INFO L111 eAbstractionObserver]: Analyzing ICFG test08.c [2021-10-11 02:29:59,592 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:29:59,596 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:29:59,607 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:29:59,636 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:29:59,637 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:29:59,637 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:29:59,637 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:29:59,637 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:29:59,638 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:29:59,638 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:29:59,638 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:29:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2021-10-11 02:29:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:29:59,656 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:29:59,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:29:59,662 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:29:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:29:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 54204, now seen corresponding path program 1 times [2021-10-11 02:29:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:29:59,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196132309] [2021-10-11 02:29:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:29:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:59,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:29:59,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:29:59,944 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:29:59,944 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:29:59,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:29:59,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:29:59 BoogieIcfgContainer [2021-10-11 02:29:59,996 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:29:59,997 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:29:59,999 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:29:59,999 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:00,000 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:29:59" (3/4) ... [2021-10-11 02:30:00,003 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:00,056 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_042d6179-4af1-4e8b-9947-aa53242d4ea8/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:00,057 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:00,064 INFO L168 Benchmark]: Toolchain (without parser) took 1341.17 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 60.1 MB in the beginning and 68.4 MB in the end (delta: -8.2 MB). Peak memory consumption was 24.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,064 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.6 MB in the beginning and 66.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:00,066 INFO L168 Benchmark]: CACSL2BoogieTranslator took 226.64 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 60.1 MB in the beginning and 106.0 MB in the end (delta: -45.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,066 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 130.0 MB. Free memory was 106.0 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,067 INFO L168 Benchmark]: Boogie Preprocessor took 20.33 ms. Allocated memory is still 130.0 MB. Free memory was 104.7 MB in the beginning and 103.9 MB in the end (delta: 758.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:00,068 INFO L168 Benchmark]: RCFGBuilder took 553.91 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 84.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,068 INFO L168 Benchmark]: TraceAbstraction took 434.98 ms. Allocated memory is still 130.0 MB. Free memory was 83.8 MB in the beginning and 70.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,069 INFO L168 Benchmark]: Witness Printer took 60.32 ms. Allocated memory is still 130.0 MB. Free memory was 70.4 MB in the beginning and 68.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:00,078 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 94.4 MB. Free memory was 66.6 MB in the beginning and 66.6 MB in the end (delta: 25.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 226.64 ms. Allocated memory was 94.4 MB in the beginning and 130.0 MB in the end (delta: 35.7 MB). Free memory was 60.1 MB in the beginning and 106.0 MB in the end (delta: -45.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.97 ms. Allocated memory is still 130.0 MB. Free memory was 106.0 MB in the beginning and 104.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.33 ms. Allocated memory is still 130.0 MB. Free memory was 104.7 MB in the beginning and 103.9 MB in the end (delta: 758.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 553.91 ms. Allocated memory is still 130.0 MB. Free memory was 103.9 MB in the beginning and 84.5 MB in the end (delta: 19.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 434.98 ms. Allocated memory is still 130.0 MB. Free memory was 83.8 MB in the beginning and 70.4 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Witness Printer took 60.32 ms. Allocated memory is still 130.0 MB. Free memory was 70.4 MB in the beginning and 68.4 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: 38]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6] int a, b; [L7] int *p1, *p2; [L21] p1 = &a [L22] p2 = &b [L24] b = 1 [L25] a = 5 [L27] EXPR \read(a) [L27] a-- [L10] EXPR \read(*p1) [L10] EXPR \read(*p2) [L10] EXPR \read(a) [L10] int v = *p1 + *p2 - a; [L11] COND TRUE v == 1 [L12] p1 = p2 [L13] return v; [L29] a = f() [L31] EXPR \read(a) VAL [a={3:0}, b={8:0}, p1={8:0}, p2={8:0}] [L31] COND TRUE a && p1 == p2 [L38] reach_error() VAL [a={3:0}, b={8:0}, p1={8:0}, p2={8:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...