./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL --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 32bit --witnessprinter.graph.data.programhash 04682225c8f8ef1d718e2eff7a5dbc28147daac3b8dcdca523479af4f0e32241 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:27:03,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:27:03,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:27:03,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:27:03,243 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:27:03,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:27:03,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:27:03,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:27:03,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:27:03,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:27:03,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:27:03,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:27:03,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:27:03,269 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:27:03,271 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:27:03,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:27:03,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:27:03,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:27:03,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:27:03,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:27:03,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:27:03,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:27:03,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:27:03,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:27:03,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:27:03,307 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:27:03,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:27:03,310 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:27:03,310 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:27:03,312 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:27:03,313 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:27:03,314 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:27:03,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:27:03,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:27:03,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:27:03,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:27:03,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:27:03,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:27:03,320 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:27:03,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:27:03,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:27:03,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-11-19 05:27:03,364 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:27:03,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:27:03,370 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:27:03,370 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:27:03,377 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:27:03,377 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:27:03,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:27:03,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:27:03,379 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:27:03,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:27:03,380 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:27:03,380 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:27:03,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 05:27:03,381 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 05:27:03,382 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:27:03,382 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 05:27:03,382 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:27:03,382 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 05:27:03,383 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:27:03,383 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:27:03,383 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:27:03,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:03,384 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:27:03,384 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:27:03,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 05:27:03,385 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:27:03,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:27:03,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 05:27:03,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:27:03,386 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_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04682225c8f8ef1d718e2eff7a5dbc28147daac3b8dcdca523479af4f0e32241 [2021-11-19 05:27:03,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:27:03,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:27:03,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:27:03,715 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:27:03,716 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:27:03,717 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2021-11-19 05:27:03,781 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/data/762c8ebf9/18880620eedc473aa3bbbbba498f7a1e/FLAG3c2398304 [2021-11-19 05:27:04,207 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:27:04,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2021-11-19 05:27:04,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/data/762c8ebf9/18880620eedc473aa3bbbbba498f7a1e/FLAG3c2398304 [2021-11-19 05:27:04,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/data/762c8ebf9/18880620eedc473aa3bbbbba498f7a1e [2021-11-19 05:27:04,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:27:04,615 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 05:27:04,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:04,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:27:04,623 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:27:04,624 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b8b00b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04, skipping insertion in model container [2021-11-19 05:27:04,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:27:04,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:27:04,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c[948,961] [2021-11-19 05:27:04,889 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:04,903 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:27:04,928 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c[948,961] [2021-11-19 05:27:04,930 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:27:04,950 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:27:04,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04 WrapperNode [2021-11-19 05:27:04,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:27:04,952 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:04,952 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 05:27:04,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 05:27:04,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,981 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-11-19 05:27:04,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 05:27:04,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:27:04,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:27:04,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:27:04,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:04,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:05,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:27:05,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:27:05,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:27:05,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:27:05,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (1/1) ... [2021-11-19 05:27:05,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:27:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:27:05,052 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:27:05,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:27:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 05:27:05,090 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-11-19 05:27:05,090 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-11-19 05:27:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 05:27:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-11-19 05:27:05,091 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-11-19 05:27:05,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:27:05,091 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:27:05,146 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:27:05,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:27:05,307 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:27:05,313 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:27:05,314 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 05:27:05,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:05 BoogieIcfgContainer [2021-11-19 05:27:05,316 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:27:05,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:27:05,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:27:05,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:27:05,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:27:04" (1/3) ... [2021-11-19 05:27:05,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f29a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:05, skipping insertion in model container [2021-11-19 05:27:05,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:27:04" (2/3) ... [2021-11-19 05:27:05,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a2f29a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:27:05, skipping insertion in model container [2021-11-19 05:27:05,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:05" (3/3) ... [2021-11-19 05:27:05,324 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03WithOverflowBug.c [2021-11-19 05:27:05,329 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:27:05,329 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-19 05:27:05,424 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:27:05,432 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 05:27:05,432 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-19 05:27:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:27:05,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-19 05:27:05,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:05,472 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:05,474 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 05:27:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:05,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1098651861, now seen corresponding path program 1 times [2021-11-19 05:27:05,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:05,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316558568] [2021-11-19 05:27:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:05,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:05,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:27:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:27:05,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:27:05,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316558568] [2021-11-19 05:27:05,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316558568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:27:05,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:27:05,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:27:05,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210312810] [2021-11-19 05:27:05,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:27:05,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:27:05,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:27:05,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:27:05,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:27:05,789 INFO L87 Difference]: Start difference. First operand has 31 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:27:05,918 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-19 05:27:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:27:05,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-19 05:27:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:27:05,934 INFO L225 Difference]: With dead ends: 47 [2021-11-19 05:27:05,934 INFO L226 Difference]: Without dead ends: 26 [2021-11-19 05:27:05,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:27:05,945 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:27:05,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 101 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:27:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-19 05:27:05,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-11-19 05:27:05,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:05,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-19 05:27:05,980 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2021-11-19 05:27:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:27:05,980 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-19 05:27:05,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 05:27:05,981 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-19 05:27:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-19 05:27:05,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:27:05,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:27:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:27:05,983 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-11-19 05:27:05,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:27:05,984 INFO L85 PathProgramCache]: Analyzing trace with hash -301530635, now seen corresponding path program 1 times [2021-11-19 05:27:05,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:27:05,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468063377] [2021-11-19 05:27:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:27:05,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:27:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:27:05,996 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 05:27:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 05:27:06,021 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 05:27:06,021 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 05:27:06,023 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 4 remaining) [2021-11-19 05:27:06,025 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 4 remaining) [2021-11-19 05:27:06,026 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 4 remaining) [2021-11-19 05:27:06,026 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 4 remaining) [2021-11-19 05:27:06,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:27:06,030 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-11-19 05:27:06,034 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 05:27:06,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 05:27:06 BoogieIcfgContainer [2021-11-19 05:27:06,053 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 05:27:06,054 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 05:27:06,054 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 05:27:06,054 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 05:27:06,055 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:27:05" (3/4) ... [2021-11-19 05:27:06,057 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 05:27:06,100 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 05:27:06,101 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 05:27:06,102 INFO L158 Benchmark]: Toolchain (without parser) took 1487.38ms. Allocated memory is still 107.0MB. Free memory was 68.1MB in the beginning and 82.8MB in the end (delta: -14.7MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,102 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 84.0MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:27:06,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.13ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 81.8MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,104 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.11ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 80.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,104 INFO L158 Benchmark]: Boogie Preprocessor took 18.77ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 79.7MB in the end (delta: 868.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 05:27:06,105 INFO L158 Benchmark]: RCFGBuilder took 314.42ms. Allocated memory is still 107.0MB. Free memory was 79.3MB in the beginning and 69.7MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,105 INFO L158 Benchmark]: TraceAbstraction took 736.10ms. Allocated memory is still 107.0MB. Free memory was 69.3MB in the beginning and 44.2MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,106 INFO L158 Benchmark]: Witness Printer took 46.99ms. Allocated memory is still 107.0MB. Free memory was 44.2MB in the beginning and 82.8MB in the end (delta: -38.6MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2021-11-19 05:27:06,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 107.0MB. Free memory was 84.1MB in the beginning and 84.0MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.13ms. Allocated memory is still 107.0MB. Free memory was 67.9MB in the beginning and 81.8MB in the end (delta: -13.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.11ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 80.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.77ms. Allocated memory is still 107.0MB. Free memory was 80.6MB in the beginning and 79.7MB in the end (delta: 868.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 314.42ms. Allocated memory is still 107.0MB. Free memory was 79.3MB in the beginning and 69.7MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 736.10ms. Allocated memory is still 107.0MB. Free memory was 69.3MB in the beginning and 44.2MB in the end (delta: 25.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * Witness Printer took 46.99ms. Allocated memory is still 107.0MB. Free memory was 44.2MB in the beginning and 82.8MB in the end (delta: -38.6MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 34]: integer overflow possible integer overflow possible We found a FailurePath: [L40] int n = __VERIFIER_nondet_int(); [L41] CALL isEven(n) VAL [\old(n)=-2147483648] [L29] COND FALSE !(n == 0) VAL [\old(n)=-2147483648, n=-2147483648] [L31] COND FALSE !(n == 1) VAL [\old(n)=-2147483648, n=-2147483648] [L34] n - 1 VAL [\old(n)=-2147483648, n=-2147483648] - UnprovableResult [Line: 34]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 101 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 75 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 26 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 6, 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, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-19 05:27:06,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae50bb2-f666-48a2-bd3f-7ac282fd01ec/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)