./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c -s /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/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 32bit --witnessprinter.graph.data.programhash 1c7eaf6fd654eb823cca8af53b20b25aebb12776 ............................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-26 02:44:18,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:44:18,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:44:18,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:44:18,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:44:18,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:44:18,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:44:18,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:44:18,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:44:18,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:44:18,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:44:18,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:44:18,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:44:18,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:44:18,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:44:18,054 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:44:18,055 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:44:18,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:44:18,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:44:18,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:44:18,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:44:18,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:44:18,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:44:18,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:44:18,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:44:18,082 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:44:18,082 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:44:18,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:44:18,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:44:18,087 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:44:18,087 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:44:18,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:44:18,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:44:18,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:44:18,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:44:18,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:44:18,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:44:18,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:44:18,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:44:18,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:44:18,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:44:18,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2019-11-26 02:44:18,128 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:44:18,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:44:18,131 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:44:18,131 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:44:18,132 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:44:18,132 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:44:18,132 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:44:18,132 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:44:18,133 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:44:18,133 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:44:18,134 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:44:18,135 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:44:18,135 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:44:18,135 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:44:18,135 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:44:18,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:44:18,137 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:44:18,137 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-26 02:44:18,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:44:18,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:44:18,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:44:18,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:44:18,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:44:18,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:44:18,139 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-11-26 02:44:18,139 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:44:18,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:44:18,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:44:18,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:44:18,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:44:18,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:44:18,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:44:18,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:44:18,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:44:18,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:44:18,142 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:44:18,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:44:18,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:44:18,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:44:18,143 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_80944c5c-8fbf-4c38-b9d9-97b119591f7a/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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c7eaf6fd654eb823cca8af53b20b25aebb12776 [2019-11-26 02:44:18,312 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:44:18,330 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:44:18,333 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:44:18,343 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:44:18,343 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:44:18,344 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2019-11-26 02:44:18,412 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/data/e7e2a12ad/091bc8423d794f578861426753f40b6e/FLAG206974fca [2019-11-26 02:44:18,743 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:44:18,744 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2019-11-26 02:44:18,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/data/e7e2a12ad/091bc8423d794f578861426753f40b6e/FLAG206974fca [2019-11-26 02:44:19,137 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/data/e7e2a12ad/091bc8423d794f578861426753f40b6e [2019-11-26 02:44:19,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:44:19,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:44:19,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:44:19,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:44:19,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:44:19,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a032562 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19, skipping insertion in model container [2019-11-26 02:44:19,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:44:19,172 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:44:19,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:44:19,328 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:44:19,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:44:19,427 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:44:19,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19 WrapperNode [2019-11-26 02:44:19,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:44:19,429 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:44:19,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:44:19,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:44:19,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,442 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,456 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:44:19,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:44:19,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:44:19,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:44:19,465 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,466 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... [2019-11-26 02:44:19,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:44:19,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:44:19,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:44:19,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:44:19,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/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 [2019-11-26 02:44:19,539 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2019-11-26 02:44:19,540 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2019-11-26 02:44:19,540 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2019-11-26 02:44:19,541 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2019-11-26 02:44:19,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:44:19,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:44:19,875 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:44:19,876 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-26 02:44:19,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:19 BoogieIcfgContainer [2019-11-26 02:44:19,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:44:19,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:44:19,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:44:19,882 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:44:19,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:44:19" (1/3) ... [2019-11-26 02:44:19,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f11c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:44:19, skipping insertion in model container [2019-11-26 02:44:19,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:44:19" (2/3) ... [2019-11-26 02:44:19,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67f11c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:44:19, skipping insertion in model container [2019-11-26 02:44:19,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:19" (3/3) ... [2019-11-26 02:44:19,886 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd03WithOverflowBug.c [2019-11-26 02:44:19,894 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:44:19,900 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-11-26 02:44:19,909 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-11-26 02:44:19,930 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:44:19,930 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:44:19,931 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:44:19,931 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:44:19,931 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:44:19,931 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:44:19,931 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:44:19,931 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:44:19,948 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-26 02:44:19,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:44:19,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:44:19,954 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:44:19,955 INFO L410 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:44:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:44:19,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1878445815, now seen corresponding path program 1 times [2019-11-26 02:44:19,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:44:19,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825385142] [2019-11-26 02:44:19,972 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:44:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:44:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:44:20,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825385142] [2019-11-26 02:44:20,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:44:20,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:44:20,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050198795] [2019-11-26 02:44:20,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-26 02:44:20,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:44:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-26 02:44:20,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-26 02:44:20,141 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2019-11-26 02:44:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:44:20,274 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-26 02:44:20,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:44:20,276 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-11-26 02:44:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:44:20,284 INFO L225 Difference]: With dead ends: 39 [2019-11-26 02:44:20,284 INFO L226 Difference]: Without dead ends: 25 [2019-11-26 02:44:20,287 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-26 02:44:20,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-26 02:44:20,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2019-11-26 02:44:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-26 02:44:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-11-26 02:44:20,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 6 [2019-11-26 02:44:20,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:44:20,323 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-11-26 02:44:20,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-26 02:44:20,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-11-26 02:44:20,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:44:20,323 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:44:20,324 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:44:20,324 INFO L410 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-11-26 02:44:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:44:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1897721837, now seen corresponding path program 1 times [2019-11-26 02:44:20,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:44:20,325 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482385736] [2019-11-26 02:44:20,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:44:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:44:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:44:20,356 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:44:20,357 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:44:20,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:44:20 BoogieIcfgContainer [2019-11-26 02:44:20,381 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:44:20,382 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:44:20,382 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:44:20,382 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:44:20,383 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:44:19" (3/4) ... [2019-11-26 02:44:20,386 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:44:20,429 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_80944c5c-8fbf-4c38-b9d9-97b119591f7a/bin/utaipan/witness.graphml [2019-11-26 02:44:20,430 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:44:20,432 INFO L168 Benchmark]: Toolchain (without parser) took 1290.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -124.3 MB). Peak memory consumption was 10.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:20,433 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:20,434 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:20,435 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:20,435 INFO L168 Benchmark]: Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:20,436 INFO L168 Benchmark]: RCFGBuilder took 402.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:20,437 INFO L168 Benchmark]: TraceAbstraction took 502.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. [2019-11-26 02:44:20,437 INFO L168 Benchmark]: Witness Printer took 48.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:44:20,441 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 286.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.7 MB). Free memory was 950.1 MB in the beginning and 1.1 GB in the end (delta: -177.2 MB). Peak memory consumption was 23.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.90 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 402.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 502.83 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 27.6 MB). Peak memory consumption was 27.6 MB. Max. memory is 11.5 GB. * Witness Printer took 48.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 32]: integer overflow possible integer overflow possible We found a FailurePath: [L38] int n = __VERIFIER_nondet_int(); [L39] CALL isEven(n) VAL [\old(n)=-2147483648] [L27] COND FALSE !(n == 0) VAL [\old(n)=-2147483648, n=-2147483648] [L29] COND FALSE !(n == 1) VAL [\old(n)=-2147483648, n=-2147483648] [L32] n - 1 VAL [\old(n)=-2147483648, n=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 26 locations, 4 error locations. Result: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 19 SDslu, 64 SDs, 0 SdLazy, 30 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 75 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, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...