./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.08.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.08.c -s /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan --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 1f5fa094547400d5f3e334e13e9908f65492f551 .......................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 12:55:56,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 12:55:56,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 12:55:56,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 12:55:56,247 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 12:55:56,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 12:55:56,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 12:55:56,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 12:55:56,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 12:55:56,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 12:55:56,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 12:55:56,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 12:55:56,260 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 12:55:56,261 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 12:55:56,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 12:55:56,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 12:55:56,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 12:55:56,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 12:55:56,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 12:55:56,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 12:55:56,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 12:55:56,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 12:55:56,277 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 12:55:56,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 12:55:56,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 12:55:56,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 12:55:56,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 12:55:56,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 12:55:56,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 12:55:56,286 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 12:55:56,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 12:55:56,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 12:55:56,288 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 12:55:56,289 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 12:55:56,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 12:55:56,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 12:55:56,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 12:55:56,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 12:55:56,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 12:55:56,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 12:55:56,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 12:55:56,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 12:55:56,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 12:55:56,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 12:55:56,349 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 12:55:56,349 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 12:55:56,350 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 12:55:56,350 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 12:55:56,350 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 12:55:56,350 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 12:55:56,351 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 12:55:56,351 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 12:55:56,352 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 12:55:56,352 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 12:55:56,352 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 12:55:56,353 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 12:55:56,353 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 12:55:56,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 12:55:56,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 12:55:56,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 12:55:56,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 12:55:56,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 12:55:56,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 12:55:56,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 12:55:56,355 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 12:55:56,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 12:55:56,356 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 12:55:56,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 12:55:56,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 12:55:56,357 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 12:55:56,357 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 12:55:56,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:55:56,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 12:55:56,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 12:55:56,358 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 12:55:56,358 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 12:55:56,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 12:55:56,359 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 12:55:56,359 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 12:55:56,359 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 12:55:56,360 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f5fa094547400d5f3e334e13e9908f65492f551 [2020-11-22 12:55:56,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 12:55:56,629 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 12:55:56,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 12:55:56,633 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 12:55:56,634 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 12:55:56,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.08.c [2020-11-22 12:55:56,719 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/data/f042c485b/6cb0e681623447a4b0563cd4e4565b61/FLAGfd81b1206 [2020-11-22 12:55:57,158 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 12:55:57,158 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex2.08.c [2020-11-22 12:55:57,164 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/data/f042c485b/6cb0e681623447a4b0563cd4e4565b61/FLAGfd81b1206 [2020-11-22 12:55:57,562 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/data/f042c485b/6cb0e681623447a4b0563cd4e4565b61 [2020-11-22 12:55:57,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 12:55:57,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 12:55:57,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:57,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 12:55:57,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 12:55:57,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45487007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57, skipping insertion in model container [2020-11-22 12:55:57,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 12:55:57,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 12:55:57,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:57,764 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 12:55:57,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 12:55:57,807 INFO L208 MainTranslator]: Completed translation [2020-11-22 12:55:57,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57 WrapperNode [2020-11-22 12:55:57,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 12:55:57,809 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:57,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 12:55:57,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 12:55:57,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 12:55:57,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 12:55:57,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 12:55:57,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 12:55:57,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... [2020-11-22 12:55:57,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 12:55:57,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 12:55:57,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 12:55:57,867 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 12:55:57,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 12:55:57,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 12:55:57,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 12:55:58,159 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 12:55:58,159 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 12:55:58,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:58 BoogieIcfgContainer [2020-11-22 12:55:58,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 12:55:58,163 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 12:55:58,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 12:55:58,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 12:55:58,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:55:57" (1/3) ... [2020-11-22 12:55:58,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc3244b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:58, skipping insertion in model container [2020-11-22 12:55:58,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:55:57" (2/3) ... [2020-11-22 12:55:58,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc3244b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:55:58, skipping insertion in model container [2020-11-22 12:55:58,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:58" (3/3) ... [2020-11-22 12:55:58,170 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex2.08.c [2020-11-22 12:55:58,193 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 12:55:58,197 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-22 12:55:58,223 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-22 12:55:58,245 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 12:55:58,245 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 12:55:58,245 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 12:55:58,246 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 12:55:58,246 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 12:55:58,246 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 12:55:58,246 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 12:55:58,246 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 12:55:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-22 12:55:58,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-22 12:55:58,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 12:55:58,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-22 12:55:58,262 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 12:55:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 12:55:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-11-22 12:55:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 12:55:58,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292259476] [2020-11-22 12:55:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 12:55:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:55:58,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:55:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 12:55:58,358 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 12:55:58,373 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 12:55:58,374 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 12:55:58,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 12:55:58,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 12:55:58 BoogieIcfgContainer [2020-11-22 12:55:58,389 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 12:55:58,390 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 12:55:58,390 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 12:55:58,390 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 12:55:58,390 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:55:58" (3/4) ... [2020-11-22 12:55:58,392 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 12:55:58,423 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_2e08054e-e63d-463b-926a-e8e6a127c47f/bin/utaipan/witness.graphml [2020-11-22 12:55:58,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 12:55:58,425 INFO L168 Benchmark]: Toolchain (without parser) took 858.00 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 66.0 MB in the beginning and 66.2 MB in the end (delta: -193.5 kB). Peak memory consumption was 15.8 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:58,426 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 94.4 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:58,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.41 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 66.0 MB in the beginning and 91.4 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:58,428 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.00 ms. Allocated memory is still 113.2 MB. Free memory was 91.4 MB in the beginning and 90.4 MB in the end (delta: 939.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:58,429 INFO L168 Benchmark]: Boogie Preprocessor took 17.30 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.5 MB in the end (delta: 934.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:58,430 INFO L168 Benchmark]: RCFGBuilder took 294.93 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 78.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:58,431 INFO L168 Benchmark]: TraceAbstraction took 225.70 ms. Allocated memory is still 113.2 MB. Free memory was 78.3 MB in the beginning and 67.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-22 12:55:58,431 INFO L168 Benchmark]: Witness Printer took 33.42 ms. Allocated memory is still 113.2 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 12:55:58,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 94.4 MB. Free memory is still 51.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.41 ms. Allocated memory was 94.4 MB in the beginning and 113.2 MB in the end (delta: 18.9 MB). Free memory was 66.0 MB in the beginning and 91.4 MB in the end (delta: -25.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.00 ms. Allocated memory is still 113.2 MB. Free memory was 91.4 MB in the beginning and 90.4 MB in the end (delta: 939.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.30 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.5 MB in the end (delta: 934.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 294.93 ms. Allocated memory is still 113.2 MB. Free memory was 89.5 MB in the beginning and 78.8 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 225.70 ms. Allocated memory is still 113.2 MB. Free memory was 78.3 MB in the beginning and 67.8 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 33.42 ms. Allocated memory is still 113.2 MB. Free memory was 67.8 MB in the beginning and 66.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 27]: 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] 2*y - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.1s, 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=15occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...