./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 8d31f386 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 bea242fee1056dc37ef6cdee148ae42dd1081325 ................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-wip.dd.multireach-323-8d31f38 [2021-07-06 15:31:24,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-06 15:31:24,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-06 15:31:24,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-07-06 15:31:24,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-07-06 15:31:24,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-07-06 15:31:24,075 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-07-06 15:31:24,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-07-06 15:31:24,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-07-06 15:31:24,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-07-06 15:31:24,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-07-06 15:31:24,093 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-07-06 15:31:24,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-07-06 15:31:24,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-07-06 15:31:24,096 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-07-06 15:31:24,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-07-06 15:31:24,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-07-06 15:31:24,101 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-07-06 15:31:24,103 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-07-06 15:31:24,108 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-07-06 15:31:24,109 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-07-06 15:31:24,110 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-07-06 15:31:24,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-07-06 15:31:24,113 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-07-06 15:31:24,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-07-06 15:31:24,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-07-06 15:31:24,119 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-07-06 15:31:24,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-07-06 15:31:24,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-07-06 15:31:24,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-07-06 15:31:24,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-07-06 15:31:24,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-07-06 15:31:24,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-07-06 15:31:24,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-07-06 15:31:24,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-07-06 15:31:24,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-07-06 15:31:24,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-07-06 15:31:24,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-07-06 15:31:24,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-07-06 15:31:24,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-07-06 15:31:24,129 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-07-06 15:31:24,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-07-06 15:31:24,169 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-06 15:31:24,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-06 15:31:24,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-06 15:31:24,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-06 15:31:24,172 INFO L138 SettingsManager]: * Use SBE=true [2021-07-06 15:31:24,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-06 15:31:24,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-06 15:31:24,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-07-06 15:31:24,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-06 15:31:24,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-06 15:31:24,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-06 15:31:24,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-06 15:31:24,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-06 15:31:24,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-06 15:31:24,176 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-07-06 15:31:24,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-06 15:31:24,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-06 15:31:24,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-06 15:31:24,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-06 15:31:24,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-06 15:31:24,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-06 15:31:24,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-06 15:31:24,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 15:31:24,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-06 15:31:24,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-06 15:31:24,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-06 15:31:24,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-06 15:31:24,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-06 15:31:24,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-06 15:31:24,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-07-06 15:31:24,179 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bea242fee1056dc37ef6cdee148ae42dd1081325 [2021-07-06 15:31:24,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-06 15:31:24,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-06 15:31:24,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-06 15:31:24,520 INFO L271 PluginConnector]: Initializing CDTParser... [2021-07-06 15:31:24,521 INFO L275 PluginConnector]: CDTParser initialized [2021-07-06 15:31:24,522 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2021-07-06 15:31:24,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57c778e7/0c88bda3f084423891e834641f102957/FLAG922daef39 [2021-07-06 15:31:24,977 INFO L306 CDTParser]: Found 1 translation units. [2021-07-06 15:31:24,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2021-07-06 15:31:24,983 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57c778e7/0c88bda3f084423891e834641f102957/FLAG922daef39 [2021-07-06 15:31:25,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b57c778e7/0c88bda3f084423891e834641f102957 [2021-07-06 15:31:25,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-06 15:31:25,008 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-07-06 15:31:25,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-07-06 15:31:25,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-07-06 15:31:25,014 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-07-06 15:31:25,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77d8c88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25, skipping insertion in model container [2021-07-06 15:31:25,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-07-06 15:31:25,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-07-06 15:31:25,188 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c[948,961] [2021-07-06 15:31:25,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 15:31:25,196 INFO L203 MainTranslator]: Completed pre-run [2021-07-06 15:31:25,214 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c[948,961] [2021-07-06 15:31:25,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-07-06 15:31:25,229 INFO L208 MainTranslator]: Completed translation [2021-07-06 15:31:25,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25 WrapperNode [2021-07-06 15:31:25,231 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-07-06 15:31:25,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-06 15:31:25,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-06 15:31:25,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-06 15:31:25,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,247 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,302 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-06 15:31:25,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-06 15:31:25,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-06 15:31:25,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-06 15:31:25,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,329 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-06 15:31:25,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-06 15:31:25,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-06 15:31:25,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-06 15:31:25,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (1/1) ... [2021-07-06 15:31:25,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-06 15:31:25,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-07-06 15:31:25,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-07-06 15:31:25,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-07-06 15:31:25,424 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2021-07-06 15:31:25,425 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2021-07-06 15:31:25,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-07-06 15:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-07-06 15:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2021-07-06 15:31:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2021-07-06 15:31:25,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-06 15:31:25,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-06 15:31:25,699 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-06 15:31:25,699 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-07-06 15:31:25,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:31:25 BoogieIcfgContainer [2021-07-06 15:31:25,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-06 15:31:25,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-06 15:31:25,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-06 15:31:25,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-06 15:31:25,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.07 03:31:25" (1/3) ... [2021-07-06 15:31:25,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6ca7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 03:31:25, skipping insertion in model container [2021-07-06 15:31:25,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.07 03:31:25" (2/3) ... [2021-07-06 15:31:25,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6ca7a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.07 03:31:25, skipping insertion in model container [2021-07-06 15:31:25,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:31:25" (3/3) ... [2021-07-06 15:31:25,706 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03WithOverflowBug.c [2021-07-06 15:31:25,711 INFO L198 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-06 15:31:25,712 INFO L158 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-07-06 15:31:25,768 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW ======== [2021-07-06 15:31:25,775 INFO L329 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 15:31:25,776 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 15:31:25,793 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) [2021-07-06 15:31:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-07-06 15:31:25,796 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 15:31:25,797 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-07-06 15:31:25,797 INFO L374 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-07-06 15:31:25,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 15:31:25,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1098651861, now seen corresponding path program 1 times [2021-07-06 15:31:25,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 15:31:25,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514266615] [2021-07-06 15:31:25,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 15:31:25,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 15:31:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 15:31:25,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:25,966 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 15:31:25,967 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:25,967 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:25,982 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:25,983 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:25,993 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:25,993 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 15:31:26,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 15:31:26,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514266615] [2021-07-06 15:31:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514266615] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 15:31:26,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 15:31:26,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-06 15:31:26,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595483985] [2021-07-06 15:31:26,013 INFO L425 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-06 15:31:26,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 15:31:26,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-06 15:31:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-06 15:31:26,028 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) [2021-07-06 15:31:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 15:31:26,126 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-07-06 15:31:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-06 15:31:26,128 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 [2021-07-06 15:31:26,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 15:31:26,134 INFO L225 Difference]: With dead ends: 47 [2021-07-06 15:31:26,134 INFO L226 Difference]: Without dead ends: 22 [2021-07-06 15:31:26,137 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-06 15:31:26,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-07-06 15:31:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-07-06 15:31:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2021-07-06 15:31:26,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-07-06 15:31:26,164 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 7 [2021-07-06 15:31:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 15:31:26,164 INFO L442 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-07-06 15:31:26,164 INFO L443 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) [2021-07-06 15:31:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-07-06 15:31:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-06 15:31:26,166 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 15:31:26,166 INFO L525 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 15:31:26,166 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-06 15:31:26,166 INFO L374 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-07-06 15:31:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 15:31:26,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1826116185, now seen corresponding path program 1 times [2021-07-06 15:31:26,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 15:31:26,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520385224] [2021-07-06 15:31:26,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 15:31:26,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 15:31:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-06 15:31:26,248 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-07-06 15:31:26,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,254 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,255 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,277 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,278 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,293 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-07-06 15:31:26,307 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-07-06 15:31:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-06 15:31:26,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-06 15:31:26,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520385224] [2021-07-06 15:31:26,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520385224] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-06 15:31:26,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-06 15:31:26,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-06 15:31:26,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180674656] [2021-07-06 15:31:26,339 INFO L425 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-06 15:31:26,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-06 15:31:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-06 15:31:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-06 15:31:26,344 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-07-06 15:31:26,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-06 15:31:26,459 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-07-06 15:31:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-06 15:31:26,460 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) Word has length 19 [2021-07-06 15:31:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-06 15:31:26,461 INFO L225 Difference]: With dead ends: 22 [2021-07-06 15:31:26,463 INFO L226 Difference]: Without dead ends: 0 [2021-07-06 15:31:26,465 INFO L795 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 109.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-06 15:31:26,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-06 15:31:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-06 15:31:26,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-06 15:31:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-06 15:31:26,467 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2021-07-06 15:31:26,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-06 15:31:26,468 INFO L442 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-06 15:31:26,472 INFO L443 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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) [2021-07-06 15:31:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-06 15:31:26,473 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-06 15:31:26,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-07-06 15:31:26,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,483 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-07-06 15:31:26,577 INFO L762 garLoopResultBuilder]: For program point L34-1(line 34) no Hoare annotation was computed. [2021-07-06 15:31:26,578 INFO L758 garLoopResultBuilder]: At program point L34-2(line 34) the Hoare annotation is: (and (or (<= isEven_~n 2147483645) (not (<= |isEven_#in~n| 2147483645))) (or (not (<= |isEven_#in~n| 2147483647)) (<= isEven_~n 2147483647))) [2021-07-06 15:31:26,578 INFO L762 garLoopResultBuilder]: For program point L31(lines 31 35) no Hoare annotation was computed. [2021-07-06 15:31:26,578 INFO L762 garLoopResultBuilder]: For program point L34-3(line 34) no Hoare annotation was computed. [2021-07-06 15:31:26,579 INFO L762 garLoopResultBuilder]: For program point L29(lines 29 35) no Hoare annotation was computed. [2021-07-06 15:31:26,579 INFO L762 garLoopResultBuilder]: For program point isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-07-06 15:31:26,579 INFO L765 garLoopResultBuilder]: At program point isEvenENTRY(lines 28 36) the Hoare annotation is: true [2021-07-06 15:31:26,580 INFO L762 garLoopResultBuilder]: For program point isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 34) no Hoare annotation was computed. [2021-07-06 15:31:26,580 INFO L762 garLoopResultBuilder]: For program point isEvenEXIT(lines 28 36) no Hoare annotation was computed. [2021-07-06 15:31:26,580 INFO L762 garLoopResultBuilder]: For program point isEvenFINAL(lines 28 36) no Hoare annotation was computed. [2021-07-06 15:31:26,580 INFO L762 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2021-07-06 15:31:26,580 INFO L762 garLoopResultBuilder]: For program point L24(line 24) no Hoare annotation was computed. [2021-07-06 15:31:26,581 INFO L762 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-07-06 15:31:26,581 INFO L758 garLoopResultBuilder]: At program point L24-2(line 24) the Hoare annotation is: (or (<= isOdd_~n 2147483646) (not (<= |isOdd_#in~n| 2147483646))) [2021-07-06 15:31:26,581 INFO L762 garLoopResultBuilder]: For program point L21(lines 21 25) no Hoare annotation was computed. [2021-07-06 15:31:26,581 INFO L762 garLoopResultBuilder]: For program point L24-3(line 24) no Hoare annotation was computed. [2021-07-06 15:31:26,581 INFO L762 garLoopResultBuilder]: For program point L19(lines 19 25) no Hoare annotation was computed. [2021-07-06 15:31:26,582 INFO L762 garLoopResultBuilder]: For program point isOddFINAL(lines 18 26) no Hoare annotation was computed. [2021-07-06 15:31:26,582 INFO L762 garLoopResultBuilder]: For program point isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-07-06 15:31:26,582 INFO L762 garLoopResultBuilder]: For program point isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-07-06 15:31:26,582 INFO L765 garLoopResultBuilder]: At program point isOddENTRY(lines 18 26) the Hoare annotation is: true [2021-07-06 15:31:26,583 INFO L762 garLoopResultBuilder]: For program point isOddEXIT(lines 18 26) no Hoare annotation was computed. [2021-07-06 15:31:26,583 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-07-06 15:31:26,583 INFO L762 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-07-06 15:31:26,584 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-07-06 15:31:26,584 INFO L762 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-07-06 15:31:26,584 INFO L762 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2021-07-06 15:31:26,584 INFO L762 garLoopResultBuilder]: For program point L43(lines 43 47) no Hoare annotation was computed. [2021-07-06 15:31:26,584 INFO L758 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 2147483647) [2021-07-06 15:31:26,584 INFO L762 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2021-07-06 15:31:26,585 INFO L758 garLoopResultBuilder]: At program point L39(lines 39 48) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 2147483647) [2021-07-06 15:31:26,585 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-06 15:31:26,585 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 15:31:26,588 INFO L303 ceAbstractionStarter]: Result for error location isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW was SAFE (1/4) [2021-07-06 15:31:26,598 INFO L328 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW ======== [2021-07-06 15:31:26,600 INFO L329 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mLimitAnalysisTime=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-07-06 15:31:26,602 INFO L330 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-07-06 15:31:26,603 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) [2021-07-06 15:31:26,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-07-06 15:31:26,604 INFO L517 BasicCegarLoop]: Found error trace [2021-07-06 15:31:26,604 INFO L525 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-07-06 15:31:26,605 INFO L374 AbstractCegarLoop]: === Iteration 1 === [isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-07-06 15:31:26,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-06 15:31:26,605 INFO L82 PathProgramCache]: Analyzing trace with hash -301530635, now seen corresponding path program 1 times [2021-07-06 15:31:26,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-06 15:31:26,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215440570] [2021-07-06 15:31:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-06 15:31:26,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-07-06 15:31:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 15:31:26,621 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 15:31:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-07-06 15:31:26,640 INFO L224 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-07-06 15:31:26,659 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-07-06 15:31:26,659 INFO L639 BasicCegarLoop]: Counterexample is feasible [2021-07-06 15:31:26,660 WARN L471 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-06 15:31:26,660 WARN L182 nStatisticsGenerator]: total relevant statements: 0 [2021-07-06 15:31:26,661 INFO L303 ceAbstractionStarter]: Result for error location isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW was UNSAFE (2/4) [2021-07-06 15:31:26,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.07 03:31:26 BoogieIcfgContainer [2021-07-06 15:31:26,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-06 15:31:26,686 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-07-06 15:31:26,686 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-07-06 15:31:26,687 INFO L275 PluginConnector]: Witness Printer initialized [2021-07-06 15:31:26,687 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.07 03:31:25" (3/4) ... [2021-07-06 15:31:26,688 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-07-06 15:31:26,731 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-07-06 15:31:26,731 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-07-06 15:31:26,732 INFO L168 Benchmark]: Toolchain (without parser) took 1724.21 ms. Allocated memory was 48.2 MB in the beginning and 73.4 MB in the end (delta: 25.2 MB). Free memory was 24.2 MB in the beginning and 46.3 MB in the end (delta: -22.1 MB). Peak memory consumption was 1.5 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,733 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 15:31:26,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.98 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.0 MB in the beginning and 36.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,735 INFO L168 Benchmark]: Boogie Procedure Inliner took 77.83 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 43.1 MB in the end (delta: -6.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,735 INFO L168 Benchmark]: Boogie Preprocessor took 32.96 ms. Allocated memory is still 58.7 MB. Free memory was 43.1 MB in the beginning and 42.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-07-06 15:31:26,735 INFO L168 Benchmark]: RCFGBuilder took 353.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 41.9 MB in the end (delta: 63.7 kB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,736 INFO L168 Benchmark]: TraceAbstraction took 983.95 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 48.4 MB in the end (delta: -7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,736 INFO L168 Benchmark]: Witness Printer took 45.06 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 46.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-07-06 15:31:26,740 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 48.2 MB. Free memory is still 30.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 220.98 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 24.0 MB in the beginning and 36.2 MB in the end (delta: -12.2 MB). Peak memory consumption was 3.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 77.83 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 43.1 MB in the end (delta: -6.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.96 ms. Allocated memory is still 58.7 MB. Free memory was 43.1 MB in the beginning and 42.0 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 353.76 ms. Allocated memory is still 58.7 MB. Free memory was 42.0 MB in the beginning and 41.9 MB in the end (delta: 63.7 kB). Peak memory consumption was 15.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 983.95 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 41.4 MB in the beginning and 48.4 MB in the end (delta: -7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.06 ms. Allocated memory is still 73.4 MB. Free memory was 48.1 MB in the beginning and 46.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 34]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - 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] - StatisticsResult: Ultimate Automizer benchmark data for error location: isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW CFG has 3 procedures, 31 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 822.0ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 7.2ms, AutomataDifference: 247.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 100.4ms, InitialAbstractionConstructionTime: 13.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 40 SDslu, 104 SDs, 0 SdLazy, 106 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 83.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 166.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.6ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 10 PreInvPairs, 11 NumberOfFragments, 33 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 33.1ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 60.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 22.0ms SsaConstructionTime, 68.3ms SatisfiabilityAnalysisTime, 212.8ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 24 ConstructedInterpolants, 0 QuantifiedInterpolants, 68 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 4/4 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 - StatisticsResult: Ultimate Automizer benchmark data for error location: isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW CFG has 3 procedures, 31 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 62.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.2ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9ms SsaConstructionTime, 10.2ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: n <= 2147483647 RESULT: Ultimate proved your program to be incorrect! [2021-07-06 15:31:26,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...