./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.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_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 ....................................................................................................................................................................................................................................................................... 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 [2020-11-29 23:26:15,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:26:15,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:26:15,698 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:26:15,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:26:15,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:26:15,706 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:26:15,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:26:15,715 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:26:15,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:26:15,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:26:15,727 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:26:15,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:26:15,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:26:15,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:26:15,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:26:15,738 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:26:15,739 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:26:15,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:26:15,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:26:15,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:26:15,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:26:15,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:26:15,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:26:15,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:26:15,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:26:15,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:26:15,780 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:26:15,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:26:15,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:26:15,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:26:15,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:26:15,787 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:26:15,788 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:26:15,789 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:26:15,790 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:26:15,791 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:26:15,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:26:15,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:26:15,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:26:15,793 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:26:15,794 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-29 23:26:15,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:26:15,828 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:26:15,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:26:15,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:26:15,831 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:26:15,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:26:15,832 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 23:26:15,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:26:15,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:26:15,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:26:15,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:26:15,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:26:15,834 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 23:26:15,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:26:15,835 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:26:15,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:26:15,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:26:15,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:26:15,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:26:15,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:26:15,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:26:15,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:26:15,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:26:15,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:26:15,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:26:15,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:26:15,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:26:15,839 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:26:15,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 [2020-11-29 23:26:16,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:26:16,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:26:16,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:26:16,209 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:26:16,210 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:26:16,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-29 23:26:16,279 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/data/d3948d66b/e45e091af36749748da6be734c981b27/FLAGc2a14a3c6 [2020-11-29 23:26:16,809 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:26:16,810 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-29 23:26:16,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/data/d3948d66b/e45e091af36749748da6be734c981b27/FLAGc2a14a3c6 [2020-11-29 23:26:17,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/data/d3948d66b/e45e091af36749748da6be734c981b27 [2020-11-29 23:26:17,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:26:17,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:26:17,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:26:17,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:26:17,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:26:17,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d578d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17, skipping insertion in model container [2020-11-29 23:26:17,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:26:17,195 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:26:17,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:26:17,338 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:26:17,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:26:17,392 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:26:17,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17 WrapperNode [2020-11-29 23:26:17,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:26:17,399 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:26:17,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:26:17,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:26:17,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,432 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:26:17,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:26:17,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:26:17,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:26:17,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... [2020-11-29 23:26:17,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:26:17,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:26:17,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:26:17,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:26:17,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/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 [2020-11-29 23:26:17,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:26:17,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:26:17,696 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:26:17,697 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 23:26:17,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:26:17 BoogieIcfgContainer [2020-11-29 23:26:17,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:26:17,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:26:17,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:26:17,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:26:17,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:26:17" (1/3) ... [2020-11-29 23:26:17,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1631ed35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:26:17, skipping insertion in model container [2020-11-29 23:26:17,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:26:17" (2/3) ... [2020-11-29 23:26:17,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1631ed35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:26:17, skipping insertion in model container [2020-11-29 23:26:17,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:26:17" (3/3) ... [2020-11-29 23:26:17,710 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-29 23:26:17,726 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:26:17,736 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 23:26:17,750 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 23:26:17,793 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:26:17,793 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:26:17,794 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:26:17,794 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:26:17,794 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:26:17,794 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:26:17,794 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:26:17,795 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:26:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-11-29 23:26:17,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-29 23:26:17,813 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:26:17,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-29 23:26:17,814 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:26:17,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:26:17,821 INFO L82 PathProgramCache]: Analyzing trace with hash 959367, now seen corresponding path program 1 times [2020-11-29 23:26:17,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:26:17,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448264878] [2020-11-29 23:26:17,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:26:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:26:18,117 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-11-29 23:26:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:26:18,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448264878] [2020-11-29 23:26:18,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:26:18,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 23:26:18,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111110037] [2020-11-29 23:26:18,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:26:18,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:26:18,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:26:18,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:26:18,149 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2020-11-29 23:26:18,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:26:18,224 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-11-29 23:26:18,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:26:18,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-29 23:26:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:26:18,262 INFO L225 Difference]: With dead ends: 21 [2020-11-29 23:26:18,262 INFO L226 Difference]: Without dead ends: 8 [2020-11-29 23:26:18,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:26:18,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-29 23:26:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-11-29 23:26:18,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 23:26:18,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-29 23:26:18,318 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2020-11-29 23:26:18,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:26:18,319 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-29 23:26:18,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:26:18,319 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2020-11-29 23:26:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 23:26:18,320 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:26:18,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 23:26:18,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:26:18,321 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 23:26:18,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:26:18,322 INFO L82 PathProgramCache]: Analyzing trace with hash 29740420, now seen corresponding path program 1 times [2020-11-29 23:26:18,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:26:18,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339191314] [2020-11-29 23:26:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:26:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:26:18,337 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:26:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:26:18,346 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:26:18,362 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:26:18,363 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:26:18,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:26:18,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:26:18 BoogieIcfgContainer [2020-11-29 23:26:18,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:26:18,384 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:26:18,385 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:26:18,385 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:26:18,386 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:26:17" (3/4) ... [2020-11-29 23:26:18,388 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:26:18,423 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_54011b22-6d85-4884-a764-b43c62dd5c77/bin/uautomizer/witness.graphml [2020-11-29 23:26:18,423 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:26:18,425 INFO L168 Benchmark]: Toolchain (without parser) took 1263.97 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 68.4 MB in the beginning and 88.7 MB in the end (delta: -20.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:26:18,426 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:26:18,427 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.74 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 74.7 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:26:18,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 96.5 MB. Free memory was 74.7 MB in the beginning and 73.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:26:18,428 INFO L168 Benchmark]: Boogie Preprocessor took 20.25 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:26:18,429 INFO L168 Benchmark]: RCFGBuilder took 244.35 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 63.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:26:18,430 INFO L168 Benchmark]: TraceAbstraction took 682.42 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 63.3 MB in the beginning and 90.4 MB in the end (delta: -27.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:26:18,431 INFO L168 Benchmark]: Witness Printer took 38.77 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 88.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:26:18,435 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory was 54.1 MB in the beginning and 54.1 MB in the end (delta: 42.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 233.74 ms. Allocated memory is still 96.5 MB. Free memory was 68.2 MB in the beginning and 74.7 MB in the end (delta: -6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.14 ms. Allocated memory is still 96.5 MB. Free memory was 74.7 MB in the beginning and 73.4 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.25 ms. Allocated memory is still 96.5 MB. Free memory was 73.4 MB in the beginning and 72.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 244.35 ms. Allocated memory is still 96.5 MB. Free memory was 72.4 MB in the beginning and 63.9 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 682.42 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 63.3 MB in the beginning and 90.4 MB in the end (delta: -27.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 38.77 ms. Allocated memory is still 117.4 MB. Free memory was 90.4 MB in the beginning and 88.7 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: - CounterExampleResult [Line: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, oldx; [L24] x = __VERIFIER_nondet_int() [L25] oldx = __VERIFIER_nondet_int() [L26] x > 1 && -2*x == oldx [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 16 SDslu, 3 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 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...