./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.01.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.01.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/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 9088f505b24b0512dbb9fa22d66082b538cf5175 .............................................................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2020-12-03 12:37:43,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:37:43,464 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:37:43,524 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:37:43,545 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:37:43,546 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:37:43,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:37:43,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:37:43,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:37:43,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:37:43,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:37:43,558 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:37:43,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:37:43,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:37:43,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:37:43,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:37:43,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:37:43,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:37:43,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:37:43,569 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:37:43,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:37:43,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:37:43,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:37:43,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:37:43,580 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:37:43,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:37:43,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:37:43,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:37:43,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:37:43,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:37:43,585 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:37:43,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:37:43,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:37:43,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:37:43,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:37:43,590 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:37:43,591 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:37:43,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:37:43,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:37:43,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:37:43,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:37:43,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:37:43,642 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:37:43,646 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:37:43,647 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:37:43,648 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:37:43,648 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:37:43,648 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:37:43,648 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:37:43,649 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:37:43,649 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:37:43,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:37:43,650 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:37:43,651 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:37:43,651 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:37:43,651 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:37:43,651 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:37:43,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:37:43,652 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:37:43,653 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:37:43,653 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:37:43,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:37:43,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:37:43,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:37:43,654 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:37:43,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:37:43,654 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:37:43,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:37:43,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:37:43,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:37:43,656 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:37:43,657 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:37:43,657 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:37:43,658 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:37:43,658 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:37:43,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:37:43,659 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:37:43,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:37:43,659 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:37:43,659 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_0a59b120-4210-4dc4-a63b-b0645aa42e29/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9088f505b24b0512dbb9fa22d66082b538cf5175 [2020-12-03 12:37:43,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:37:44,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:37:44,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:37:44,005 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:37:44,008 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:37:44,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.01.c [2020-12-03 12:37:44,100 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/data/1c6da19ec/e418576cb461480e9eec143f8b88bef5/FLAG08635ddda [2020-12-03 12:37:44,696 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:37:44,696 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.01.c [2020-12-03 12:37:44,707 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/data/1c6da19ec/e418576cb461480e9eec143f8b88bef5/FLAG08635ddda [2020-12-03 12:37:45,059 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/data/1c6da19ec/e418576cb461480e9eec143f8b88bef5 [2020-12-03 12:37:45,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:37:45,064 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:37:45,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:45,067 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:37:45,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:37:45,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b2bc5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45, skipping insertion in model container [2020-12-03 12:37:45,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:37:45,093 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:37:45,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:45,256 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:37:45,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:37:45,309 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:37:45,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45 WrapperNode [2020-12-03 12:37:45,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:37:45,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:45,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:37:45,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:37:45,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,327 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:37:45,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:37:45,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:37:45,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:37:45,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... [2020-12-03 12:37:45,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:37:45,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:37:45,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:37:45,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:37:45,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/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 [2020-12-03 12:37:45,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:37:45,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:37:45,648 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:37:45,648 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-03 12:37:45,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:45 BoogieIcfgContainer [2020-12-03 12:37:45,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:37:45,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:37:45,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:37:45,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:37:45,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:37:45" (1/3) ... [2020-12-03 12:37:45,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0bcc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:45, skipping insertion in model container [2020-12-03 12:37:45,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:37:45" (2/3) ... [2020-12-03 12:37:45,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0bcc04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:37:45, skipping insertion in model container [2020-12-03 12:37:45,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:45" (3/3) ... [2020-12-03 12:37:45,660 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.01.c [2020-12-03 12:37:45,675 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:37:45,677 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-03 12:37:45,688 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-03 12:37:45,714 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:37:45,714 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:37:45,714 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:37:45,715 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:37:45,715 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:37:45,715 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:37:45,715 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:37:45,715 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:37:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2020-12-03 12:37:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-03 12:37:45,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:45,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-03 12:37:45,736 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:45,742 INFO L82 PathProgramCache]: Analyzing trace with hash 31073, now seen corresponding path program 1 times [2020-12-03 12:37:45,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:45,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392107521] [2020-12-03 12:37:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:37:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:37:45,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392107521] [2020-12-03 12:37:45,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:37:45,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:37:45,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431979067] [2020-12-03 12:37:45,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:37:45,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:37:45,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:37:45,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:37:45,935 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2020-12-03 12:37:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:37:46,013 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2020-12-03 12:37:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:37:46,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-03 12:37:46,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:37:46,025 INFO L225 Difference]: With dead ends: 11 [2020-12-03 12:37:46,026 INFO L226 Difference]: Without dead ends: 8 [2020-12-03 12:37:46,029 INFO L677 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 [2020-12-03 12:37:46,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-03 12:37:46,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-03 12:37:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-03 12:37:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-03 12:37:46,085 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2020-12-03 12:37:46,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:37:46,086 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-03 12:37:46,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:37:46,086 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-03 12:37:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-03 12:37:46,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:37:46,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-03 12:37:46,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:37:46,088 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:37:46,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:37:46,088 INFO L82 PathProgramCache]: Analyzing trace with hash 963307, now seen corresponding path program 1 times [2020-12-03 12:37:46,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:37:46,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716490695] [2020-12-03 12:37:46,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:37:46,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:37:46,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:37:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:37:46,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:37:46,148 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:37:46,148 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:37:46,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:37:46,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:37:46 BoogieIcfgContainer [2020-12-03 12:37:46,166 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:37:46,167 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:37:46,167 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:37:46,167 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:37:46,168 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:37:45" (3/4) ... [2020-12-03 12:37:46,170 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:37:46,204 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_0a59b120-4210-4dc4-a63b-b0645aa42e29/bin/utaipan/witness.graphml [2020-12-03 12:37:46,204 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:37:46,206 INFO L168 Benchmark]: Toolchain (without parser) took 1141.23 ms. Allocated memory is still 102.8 MB. Free memory was 71.6 MB in the beginning and 48.4 MB in the end (delta: 23.2 MB). Peak memory consumption was 22.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:37:46,208 INFO L168 Benchmark]: CDTParser took 0.41 ms. Allocated memory is still 79.7 MB. Free memory was 50.8 MB in the beginning and 50.8 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:37:46,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.40 ms. Allocated memory is still 102.8 MB. Free memory was 71.6 MB in the beginning and 82.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:37:46,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 102.8 MB. Free memory was 82.6 MB in the beginning and 81.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:37:46,211 INFO L168 Benchmark]: Boogie Preprocessor took 18.69 ms. Allocated memory is still 102.8 MB. Free memory was 81.4 MB in the beginning and 80.6 MB in the end (delta: 795.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:37:46,212 INFO L168 Benchmark]: RCFGBuilder took 286.73 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 70.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:37:46,213 INFO L168 Benchmark]: TraceAbstraction took 513.82 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 49.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2020-12-03 12:37:46,214 INFO L168 Benchmark]: Witness Printer took 37.68 ms. Allocated memory is still 102.8 MB. Free memory was 49.7 MB in the beginning and 48.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:37:46,220 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41 ms. Allocated memory is still 79.7 MB. Free memory was 50.8 MB in the beginning and 50.8 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 245.40 ms. Allocated memory is still 102.8 MB. Free memory was 71.6 MB in the beginning and 82.6 MB in the end (delta: -11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.09 ms. Allocated memory is still 102.8 MB. Free memory was 82.6 MB in the beginning and 81.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.69 ms. Allocated memory is still 102.8 MB. Free memory was 81.4 MB in the beginning and 80.6 MB in the end (delta: 795.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 286.73 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 70.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 513.82 ms. Allocated memory is still 102.8 MB. Free memory was 69.8 MB in the beginning and 49.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * Witness Printer took 37.68 ms. Allocated memory is still 102.8 MB. Free memory was 49.7 MB in the beginning and 48.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x; [L24] x = __VERIFIER_nondet_int() [L25] COND TRUE x > 0 [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 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, 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, 8 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! Received shutdown request...