./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-VMCAI2004-Ex2.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_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/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_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-VMCAI2004-Ex2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/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_2398d481-1d15-4c13-b524-6e39612f16d5/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 ca1afc44f63014e29f4d580a04a159d6262ad0282ff2401b2251eaa1ef4b4115 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:26:32,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:26:32,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:26:32,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:26:32,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:26:32,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:26:32,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:26:32,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:26:32,113 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:26:32,119 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:26:32,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:26:32,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:26:32,123 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:26:32,126 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:26:32,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:26:32,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:26:32,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:26:32,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:26:32,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:26:32,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:26:32,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:26:32,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:26:32,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:26:32,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:26:32,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:26:32,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:26:32,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:26:32,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:26:32,178 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:26:32,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:26:32,181 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:26:32,182 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:26:32,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:26:32,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:26:32,187 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:26:32,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:26:32,188 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:26:32,189 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:26:32,189 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:26:32,190 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:26:32,191 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:26:32,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-07 01:26:32,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:26:32,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:26:32,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:26:32,223 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:26:32,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:26:32,224 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:26:32,224 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:26:32,224 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:26:32,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:26:32,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:26:32,225 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:26:32,225 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:26:32,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:26:32,226 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:26:32,226 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:26:32,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:26:32,227 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:26:32,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:26:32,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:26:32,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:26:32,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:26:32,228 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:26:32,229 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-07 01:26:32,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:26:32,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:26:32,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:26:32,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:26:32,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:26:32,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:26:32,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:26:32,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:26:32,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:26:32,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:26:32,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:26:32,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:26:32,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:26:32,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:26:32,232 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_2398d481-1d15-4c13-b524-6e39612f16d5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca1afc44f63014e29f4d580a04a159d6262ad0282ff2401b2251eaa1ef4b4115 [2021-11-07 01:26:32,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:26:32,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:26:32,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:26:32,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:26:32,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:26:32,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-VMCAI2004-Ex2.c [2021-11-07 01:26:32,711 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/data/020e55956/e0fdd25ed3384378a5fe355d74fa7775/FLAGb534a13bf [2021-11-07 01:26:33,251 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:26:33,252 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/sv-benchmarks/c/termination-crafted-lit/PodelskiRybalchenko-VMCAI2004-Ex2.c [2021-11-07 01:26:33,265 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/data/020e55956/e0fdd25ed3384378a5fe355d74fa7775/FLAGb534a13bf [2021-11-07 01:26:33,604 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/data/020e55956/e0fdd25ed3384378a5fe355d74fa7775 [2021-11-07 01:26:33,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:26:33,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:26:33,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:26:33,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:26:33,618 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:26:33,619 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,620 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548ac207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33, skipping insertion in model container [2021-11-07 01:26:33,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:26:33,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:26:33,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:26:33,816 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:26:33,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:26:33,840 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:26:33,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33 WrapperNode [2021-11-07 01:26:33,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:26:33,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:26:33,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:26:33,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:26:33,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,871 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:26:33,872 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:26:33,872 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:26:33,872 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:26:33,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,882 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:26:33,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:26:33,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:26:33,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:26:33,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (1/1) ... [2021-11-07 01:26:33,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:26:33,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:26:33,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:26:33,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:26:33,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:26:33,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:26:34,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:26:34,231 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-07 01:26:34,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:34 BoogieIcfgContainer [2021-11-07 01:26:34,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:26:34,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:26:34,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:26:34,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:26:34,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:26:33" (1/3) ... [2021-11-07 01:26:34,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240ab4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:34, skipping insertion in model container [2021-11-07 01:26:34,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:26:33" (2/3) ... [2021-11-07 01:26:34,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@240ab4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:34, skipping insertion in model container [2021-11-07 01:26:34,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:34" (3/3) ... [2021-11-07 01:26:34,253 INFO L111 eAbstractionObserver]: Analyzing ICFG PodelskiRybalchenko-VMCAI2004-Ex2.c [2021-11-07 01:26:34,259 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:26:34,259 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 01:26:34,330 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:26:34,339 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 01:26:34,340 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 01:26:34,358 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 10 states have internal predecessors, (11), 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 01:26:34,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:26:34,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:34,365 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:26:34,365 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 01:26:34,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2021-11-07 01:26:34,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:34,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71052968] [2021-11-07 01:26:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:34,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:34,578 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 01:26:34,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-07 01:26:34,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71052968] [2021-11-07 01:26:34,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71052968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:34,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:34,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 01:26:34,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836308526] [2021-11-07 01:26:34,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:34,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-07 01:26:34,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:34,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:34,603 INFO L87 Difference]: Start difference. First operand has 11 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 10 states have internal predecessors, (11), 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), 3 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 01:26:34,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:34,633 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-11-07 01:26:34,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:34,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 01:26:34,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:34,642 INFO L225 Difference]: With dead ends: 11 [2021-11-07 01:26:34,642 INFO L226 Difference]: Without dead ends: 8 [2021-11-07 01:26:34,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:26:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-07 01:26:34,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-07 01:26:34,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 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 01:26:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-11-07 01:26:34,705 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2021-11-07 01:26:34,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:34,706 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-11-07 01:26:34,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 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 01:26:34,706 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-11-07 01:26:34,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-07 01:26:34,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:34,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-07 01:26:34,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 01:26:34,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-07 01:26:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2021-11-07 01:26:34,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-07 01:26:34,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421377958] [2021-11-07 01:26:34,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:34,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 01:26:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:26:34,718 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-07 01:26:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-07 01:26:34,751 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-07 01:26:34,752 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-07 01:26:34,754 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:26:34,756 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:26:34,757 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:26:34,757 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-11-07 01:26:34,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 01:26:34,761 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-07 01:26:34,765 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-07 01:26:34,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:26:34 BoogieIcfgContainer [2021-11-07 01:26:34,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-07 01:26:34,779 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-07 01:26:34,780 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-07 01:26:34,780 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-07 01:26:34,780 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:34" (3/4) ... [2021-11-07 01:26:34,783 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-07 01:26:34,823 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/bin/utaipan-UUZaoUuFF8/witness.graphml [2021-11-07 01:26:34,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-07 01:26:34,826 INFO L168 Benchmark]: Toolchain (without parser) took 1216.41 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 53.7 MB in the beginning and 92.5 MB in the end (delta: -38.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,827 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:26:34,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.50 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 53.4 MB in the beginning and 126.0 MB in the end (delta: -72.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,832 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.14 ms. Allocated memory is still 148.9 MB. Free memory was 126.0 MB in the beginning and 125.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:26:34,833 INFO L168 Benchmark]: Boogie Preprocessor took 18.01 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 123.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,836 INFO L168 Benchmark]: RCFGBuilder took 353.58 ms. Allocated memory is still 148.9 MB. Free memory was 123.9 MB in the beginning and 115.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,836 INFO L168 Benchmark]: TraceAbstraction took 531.74 ms. Allocated memory is still 148.9 MB. Free memory was 114.5 MB in the beginning and 94.1 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,837 INFO L168 Benchmark]: Witness Printer took 44.28 ms. Allocated memory is still 148.9 MB. Free memory was 94.1 MB in the beginning and 92.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:26:34,843 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 90.2 MB. Free memory is still 69.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 231.50 ms. Allocated memory was 90.2 MB in the beginning and 148.9 MB in the end (delta: 58.7 MB). Free memory was 53.4 MB in the beginning and 126.0 MB in the end (delta: -72.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.14 ms. Allocated memory is still 148.9 MB. Free memory was 126.0 MB in the beginning and 125.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.01 ms. Allocated memory is still 148.9 MB. Free memory was 125.0 MB in the beginning and 123.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 353.58 ms. Allocated memory is still 148.9 MB. Free memory was 123.9 MB in the beginning and 115.0 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 531.74 ms. Allocated memory is still 148.9 MB. Free memory was 114.5 MB in the beginning and 94.1 MB in the end (delta: 20.5 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 44.28 ms. Allocated memory is still 148.9 MB. Free memory was 94.1 MB in the beginning and 92.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. 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: 18]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x; [L16] x = __VERIFIER_nondet_int() [L17] COND TRUE x >= 0 [L18] -2*x - UnprovableResult [Line: 18]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 18]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 18]: 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, 11 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, 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: 3 SDtfs, 5 SDslu, 0 SDs, 0 SdLazy, 9 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred 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, 4 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 01:26:34,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2398d481-1d15-4c13-b524-6e39612f16d5/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)