./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 49a260b41897f9175c064887b5a7e346062ed9cdacb52920f3bad2e734db5643 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:11:43,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:11:43,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:11:44,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:11:44,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:11:44,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:11:44,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:11:44,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:11:44,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:11:44,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:11:44,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:11:44,035 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:11:44,035 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:11:44,038 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:11:44,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:11:44,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:11:44,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:11:44,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:11:44,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:11:44,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:11:44,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:11:44,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:11:44,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:11:44,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:11:44,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:11:44,081 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:11:44,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:11:44,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:11:44,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:11:44,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:11:44,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:11:44,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:11:44,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:11:44,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:11:44,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:11:44,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:11:44,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:11:44,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:11:44,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:11:44,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:11:44,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:11:44,099 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-07 01:11:44,148 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:11:44,148 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:11:44,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:11:44,150 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:11:44,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:11:44,151 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:11:44,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:11:44,151 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:11:44,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:11:44,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:11:44,160 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:11:44,161 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:11:44,161 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:11:44,161 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:11:44,161 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:11:44,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:11:44,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:11:44,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:11:44,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:11:44,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:11:44,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:11:44,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:11:44,164 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 01:11:44,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:11:44,165 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:11:44,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:11:44,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:11:44,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:11:44,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:44,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:11:44,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:11:44,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:11:44,169 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:11:44,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:11:44,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:11:44,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:11:44,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:11:44,170 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_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49a260b41897f9175c064887b5a7e346062ed9cdacb52920f3bad2e734db5643 [2021-11-07 01:11:44,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:11:44,610 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:11:44,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:11:44,616 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:11:44,617 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:11:44,618 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-11-07 01:11:44,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/data/4c0fb0a32/02338ff2afbc482e9fa38980ef13eae3/FLAG9e57f226f [2021-11-07 01:11:45,280 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:11:45,282 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-11-07 01:11:45,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/data/4c0fb0a32/02338ff2afbc482e9fa38980ef13eae3/FLAG9e57f226f [2021-11-07 01:11:45,636 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/data/4c0fb0a32/02338ff2afbc482e9fa38980ef13eae3 [2021-11-07 01:11:45,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:11:45,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:11:45,645 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:45,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:11:45,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:11:45,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f2bcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45, skipping insertion in model container [2021-11-07 01:11:45,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:11:45,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:11:45,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:45,881 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:11:45,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:11:45,911 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:11:45,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45 WrapperNode [2021-11-07 01:11:45,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:11:45,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:45,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:11:45,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:11:45,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,944 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:11:45,945 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:11:45,945 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:11:45,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:11:45,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,965 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:11:45,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:11:45,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:11:45,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:11:45,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (1/1) ... [2021-11-07 01:11:45,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:11:45,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:11:46,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:11:46,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:11:46,071 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:11:46,071 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:11:46,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:11:46,259 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 01:11:46,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:46 BoogieIcfgContainer [2021-11-07 01:11:46,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:11:46,265 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:11:46,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:11:46,270 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:11:46,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:11:45" (1/3) ... [2021-11-07 01:11:46,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403810fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:46, skipping insertion in model container [2021-11-07 01:11:46,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:11:45" (2/3) ... [2021-11-07 01:11:46,272 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@403810fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:11:46, skipping insertion in model container [2021-11-07 01:11:46,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:46" (3/3) ... [2021-11-07 01:11:46,274 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.16.c [2021-11-07 01:11:46,282 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:11:46,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:11:46,347 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:11:46,357 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:11:46,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:11:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 4 states have (on average 1.75) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:11:46,383 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:46,384 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:11:46,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:11:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-11-07 01:11:46,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:46,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541499314] [2021-11-07 01:11:46,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:46,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:11:46,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:11:46,670 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:11:46,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541499314] [2021-11-07 01:11:46,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541499314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:11:46,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:11:46,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-07 01:11:46,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279703382] [2021-11-07 01:11:46,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:11:46,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:11:46,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:11:46,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:46,718 INFO L87 Difference]: Start difference. First operand has 7 states, 4 states have (on average 1.75) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:11:46,768 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-11-07 01:11:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:11:46,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-07 01:11:46,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:11:46,779 INFO L225 Difference]: With dead ends: 7 [2021-11-07 01:11:46,780 INFO L226 Difference]: Without dead ends: 5 [2021-11-07 01:11:46,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:11:46,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-11-07 01:11:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-11-07 01:11:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 5 transitions. [2021-11-07 01:11:46,820 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 5 transitions. Word has length 3 [2021-11-07 01:11:46,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:11:46,822 INFO L470 AbstractCegarLoop]: Abstraction has 5 states and 5 transitions. [2021-11-07 01:11:46,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:11:46,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 5 transitions. [2021-11-07 01:11:46,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:11:46,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:11:46,825 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:11:46,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:11:46,826 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-11-07 01:11:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:11:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-11-07 01:11:46,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:11:46,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856249795] [2021-11-07 01:11:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:11:46,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:11:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:11:46,870 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:11:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:11:46,908 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:11:46,908 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:11:46,911 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:11:46,914 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:11:46,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:11:46,919 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-07 01:11:46,924 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:11:46,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:11:46 BoogieIcfgContainer [2021-11-07 01:11:46,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:11:46,946 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:11:46,947 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:11:46,947 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:11:46,948 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:11:46" (3/4) ... [2021-11-07 01:11:46,950 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:11:47,002 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:11:47,003 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:11:47,006 INFO L168 Benchmark]: Toolchain (without parser) took 1362.36 ms. Allocated memory is still 117.4 MB. Free memory was 80.1 MB in the beginning and 61.1 MB in the end (delta: 19.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:47,007 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 117.4 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:47,010 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.07 ms. Allocated memory is still 117.4 MB. Free memory was 79.9 MB in the beginning and 94.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:47,014 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.35 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 92.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:47,016 INFO L168 Benchmark]: Boogie Preprocessor took 23.37 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 91.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:47,017 INFO L168 Benchmark]: RCFGBuilder took 293.99 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 83.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:47,018 INFO L168 Benchmark]: TraceAbstraction took 680.04 ms. Allocated memory is still 117.4 MB. Free memory was 82.6 MB in the beginning and 62.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:11:47,018 INFO L168 Benchmark]: Witness Printer took 57.20 ms. Allocated memory is still 117.4 MB. Free memory was 62.6 MB in the beginning and 61.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:11:47,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 117.4 MB. Free memory is still 96.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.07 ms. Allocated memory is still 117.4 MB. Free memory was 79.9 MB in the beginning and 94.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.35 ms. Allocated memory is still 117.4 MB. Free memory was 93.6 MB in the beginning and 92.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.37 ms. Allocated memory is still 117.4 MB. Free memory was 92.5 MB in the beginning and 91.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 293.99 ms. Allocated memory is still 117.4 MB. Free memory was 91.4 MB in the beginning and 83.1 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 680.04 ms. Allocated memory is still 117.4 MB. Free memory was 82.6 MB in the beginning and 62.6 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 57.20 ms. Allocated memory is still 117.4 MB. Free memory was 62.6 MB in the beginning and 61.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 28]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, y; [L24] x = __VERIFIER_nondet_int() [L25] y = __VERIFIER_nondet_int() [L26] COND TRUE x > 0 [L27] x = y [L28] y - 1 - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2 SDtfs, 3 SDslu, 0 SDs, 0 SdLazy, 4 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 2 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-07 01:11:47,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_394dbceb-dc15-437d-938d-7f96cd520b29/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)