./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/EvenOdd03.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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/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 37ac3151caa4af47a1f06dea7853d99d19358e76 .......................................................................................................................................................................................................................................................... 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 02:30:35,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:35,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:35,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:35,962 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:35,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:35,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:35,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:35,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:35,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:35,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:35,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:35,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:35,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:35,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:35,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:35,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:36,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:36,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:36,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:36,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:36,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:36,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:36,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:36,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:36,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:36,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:36,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:36,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:36,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:36,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:36,037 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:36,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:36,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:36,043 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:36,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:36,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:36,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:36,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:36,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:36,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:36,050 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:30:36,085 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:36,086 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:36,087 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:36,087 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:36,087 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:36,087 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:36,088 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:36,088 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:36,088 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:36,088 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:36,089 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:36,089 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:36,089 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:36,089 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:36,089 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:36,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:36,090 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:36,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:30:36,092 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:36,092 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:36,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:30:36,092 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:36,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:30:36,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:36,093 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:36,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:36,093 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:36,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:36,098 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:30:36,099 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:36,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:36,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:30:36,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:36,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:36,100 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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37ac3151caa4af47a1f06dea7853d99d19358e76 [2021-10-11 02:30:36,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:36,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:36,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:36,391 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:36,392 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:36,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/recursive/EvenOdd03.c [2021-10-11 02:30:36,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/data/8d036b450/a59c62d8af7f4673bc6f7c0304a0bc05/FLAG47ae334e6 [2021-10-11 02:30:36,914 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:36,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/sv-benchmarks/c/recursive/EvenOdd03.c [2021-10-11 02:30:36,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/data/8d036b450/a59c62d8af7f4673bc6f7c0304a0bc05/FLAG47ae334e6 [2021-10-11 02:30:37,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/data/8d036b450/a59c62d8af7f4673bc6f7c0304a0bc05 [2021-10-11 02:30:37,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:37,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:37,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:37,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:37,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:37,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bc5edde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37, skipping insertion in model container [2021-10-11 02:30:37,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:37,364 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:37,562 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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/sv-benchmarks/c/recursive/EvenOdd03.c[974,987] [2021-10-11 02:30:37,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:37,578 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:37,592 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_d595b0f1-91d7-414a-b9f3-dc7395fca80a/sv-benchmarks/c/recursive/EvenOdd03.c[974,987] [2021-10-11 02:30:37,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:37,607 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:37,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37 WrapperNode [2021-10-11 02:30:37,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:37,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:37,610 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:37,610 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:37,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,625 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:37,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:37,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:37,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:37,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... [2021-10-11 02:30:37,660 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:37,661 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:37,661 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:37,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:37,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/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 02:30:37,750 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-10-11 02:30:37,751 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-10-11 02:30:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:30:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:30:37,751 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-10-11 02:30:37,751 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-10-11 02:30:37,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:37,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:38,006 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:38,007 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-11 02:30:38,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38 BoogieIcfgContainer [2021-10-11 02:30:38,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:38,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:38,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:38,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:38,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:37" (1/3) ... [2021-10-11 02:30:38,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589b1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:37" (2/3) ... [2021-10-11 02:30:38,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1589b1bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:38, skipping insertion in model container [2021-10-11 02:30:38,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/3) ... [2021-10-11 02:30:38,040 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03.c [2021-10-11 02:30:38,054 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:38,068 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:30:38,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:30:38,154 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:38,155 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:30:38,155 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:38,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:38,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:38,155 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:38,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:38,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-10-11 02:30:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:30:38,185 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:38,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:38,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:30:38,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:38,197 INFO L82 PathProgramCache]: Analyzing trace with hash 465177429, now seen corresponding path program 1 times [2021-10-11 02:30:38,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:38,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018497011] [2021-10-11 02:30:38,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:38,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:38,403 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:38,425 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:38,425 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:38,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:38,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:38 BoogieIcfgContainer [2021-10-11 02:30:38,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:38,454 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:38,454 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:38,454 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:38,455 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:38" (3/4) ... [2021-10-11 02:30:38,457 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:38,495 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d595b0f1-91d7-414a-b9f3-dc7395fca80a/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:38,495 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:38,497 INFO L168 Benchmark]: Toolchain (without parser) took 1182.75 ms. Allocated memory is still 119.5 MB. Free memory was 86.2 MB in the beginning and 63.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:38,498 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 45.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:38,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.26 ms. Allocated memory is still 119.5 MB. Free memory was 86.0 MB in the beginning and 95.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:38,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.76 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 94.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:38,500 INFO L168 Benchmark]: Boogie Preprocessor took 20.53 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.7 MB in the end (delta: 851.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:38,501 INFO L168 Benchmark]: RCFGBuilder took 348.75 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 79.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:38,502 INFO L168 Benchmark]: TraceAbstraction took 441.70 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 65.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:38,502 INFO L168 Benchmark]: Witness Printer took 41.62 ms. Allocated memory is still 119.5 MB. Free memory was 65.6 MB in the beginning and 64.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:38,506 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 88.1 MB. Free memory is still 45.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 288.26 ms. Allocated memory is still 119.5 MB. Free memory was 86.0 MB in the beginning and 95.7 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.76 ms. Allocated memory is still 119.5 MB. Free memory was 95.7 MB in the beginning and 94.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.53 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 93.7 MB in the end (delta: 851.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 348.75 ms. Allocated memory is still 119.5 MB. Free memory was 93.3 MB in the beginning and 79.0 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 441.70 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 65.6 MB in the end (delta: 13.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Witness Printer took 41.62 ms. Allocated memory is still 119.5 MB. Free memory was 65.6 MB in the beginning and 64.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 49]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L40] int n = __VERIFIER_nondet_int(); [L41] COND FALSE !(n < 0) [L44] CALL, EXPR isEven(n) VAL [\old(n)=0] [L29] COND TRUE n == 0 [L30] return 1; VAL [\old(n)=0, \result=1, n=0] [L44] RET, EXPR isEven(n) [L44] int result = isEven(n); [L45] int mod = n % 2; [L46] COND FALSE !(result < 0 || result == mod) [L49] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, 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=23occurred 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, 10 NumberOfCodeBlocks, 10 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...