./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c -s /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 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 0.2.0-a4ecdab [2020-11-30 00:35:21,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:35:21,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:35:21,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:35:21,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:35:21,578 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:35:21,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:35:21,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:35:21,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:35:21,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:35:21,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:35:21,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:35:21,598 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:35:21,601 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:35:21,603 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:35:21,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:35:21,606 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:35:21,607 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:35:21,613 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:35:21,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:35:21,622 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:35:21,624 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:35:21,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:35:21,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:35:21,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:35:21,631 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:35:21,631 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:35:21,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:35:21,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:35:21,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:35:21,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:35:21,638 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:35:21,640 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:35:21,641 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:35:21,642 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:35:21,642 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:35:21,643 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:35:21,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:35:21,644 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:35:21,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:35:21,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:35:21,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-11-30 00:35:21,688 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:35:21,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:35:21,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:35:21,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:35:21,695 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:35:21,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:35:21,696 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:35:21,696 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:35:21,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:35:21,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:35:21,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:35:21,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 00:35:21,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:35:21,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 00:35:21,699 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 00:35:21,699 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:35:21,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:35:21,699 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:35:21,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 00:35:21,700 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:35:21,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:35:21,700 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:35:21,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:35:21,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:35:21,701 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:35:21,701 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:35:21,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 00:35:21,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:35:21,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:35:21,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 00:35:21,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:35:21,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bea242fee1056dc37ef6cdee148ae42dd1081325 [2020-11-30 00:35:21,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:35:21,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:35:21,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:35:21,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:35:21,993 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:35:21,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/../../sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2020-11-30 00:35:22,065 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/data/c9b9b1237/45c265e89dbb4fb9b1a1af7278a96f6d/FLAG0e5cf61d3 [2020-11-30 00:35:22,629 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:35:22,629 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/sv-benchmarks/c/recursive/EvenOdd03WithOverflowBug.c [2020-11-30 00:35:22,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/data/c9b9b1237/45c265e89dbb4fb9b1a1af7278a96f6d/FLAG0e5cf61d3 [2020-11-30 00:35:23,016 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/data/c9b9b1237/45c265e89dbb4fb9b1a1af7278a96f6d [2020-11-30 00:35:23,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:35:23,024 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:35:23,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:35:23,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:35:23,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:35:23,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@618de15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23, skipping insertion in model container [2020-11-30 00:35:23,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:35:23,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:35:23,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:35:23,248 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:35:23,273 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:35:23,300 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:35:23,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23 WrapperNode [2020-11-30 00:35:23,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:35:23,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:35:23,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:35:23,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:35:23,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:35:23,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:35:23,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:35:23,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:35:23,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,356 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... [2020-11-30 00:35:23,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:35:23,367 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:35:23,367 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:35:23,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:35:23,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:35:23,457 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-11-30 00:35:23,457 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-11-30 00:35:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:35:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:35:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-11-30 00:35:23,458 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-11-30 00:35:23,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:35:23,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:35:23,817 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:35:23,817 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:35:23,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:23 BoogieIcfgContainer [2020-11-30 00:35:23,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:35:23,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:35:23,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:35:23,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:35:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:35:23" (1/3) ... [2020-11-30 00:35:23,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76424114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:35:23, skipping insertion in model container [2020-11-30 00:35:23,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:35:23" (2/3) ... [2020-11-30 00:35:23,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76424114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:35:23, skipping insertion in model container [2020-11-30 00:35:23,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:23" (3/3) ... [2020-11-30 00:35:23,836 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd03WithOverflowBug.c [2020-11-30 00:35:23,845 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:35:23,849 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-30 00:35:23,861 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 00:35:23,887 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:35:23,887 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 00:35:23,887 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:35:23,887 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:35:23,887 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:35:23,887 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:35:23,888 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:35:23,888 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:35:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-11-30 00:35:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 00:35:23,909 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:23,910 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:23,910 INFO L429 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 00:35:23,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:23,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1100498903, now seen corresponding path program 1 times [2020-11-30 00:35:23,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:23,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875321396] [2020-11-30 00:35:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:35:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:35:24,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875321396] [2020-11-30 00:35:24,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:35:24,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:35:24,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562597627] [2020-11-30 00:35:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:35:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:35:24,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:35:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:35:24,164 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 5 states. [2020-11-30 00:35:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:35:24,322 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-11-30 00:35:24,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:35:24,324 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 00:35:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:35:24,331 INFO L225 Difference]: With dead ends: 48 [2020-11-30 00:35:24,332 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 00:35:24,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:35:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 00:35:24,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2020-11-30 00:35:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 00:35:24,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-30 00:35:24,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2020-11-30 00:35:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:35:24,363 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-30 00:35:24,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:35:24,363 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-30 00:35:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:35:24,364 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:35:24,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:35:24,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:35:24,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 00:35:24,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:35:24,365 INFO L82 PathProgramCache]: Analyzing trace with hash -244272333, now seen corresponding path program 1 times [2020-11-30 00:35:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:35:24,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574866884] [2020-11-30 00:35:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:35:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:35:24,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:35:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:35:24,403 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:35:24,421 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:35:24,421 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:35:24,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:35:24,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:35:24 BoogieIcfgContainer [2020-11-30 00:35:24,446 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:35:24,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:35:24,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:35:24,447 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:35:24,447 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:35:23" (3/4) ... [2020-11-30 00:35:24,449 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:35:24,485 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_58ded411-e9c9-4098-84d8-2eba1e017395/bin/uautomizer/witness.graphml [2020-11-30 00:35:24,485 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:35:24,487 INFO L168 Benchmark]: Toolchain (without parser) took 1461.83 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.7 MB in the beginning and 50.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:24,487 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:35:24,488 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.43 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.4 MB in the beginning and 98.2 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:24,489 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.62 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 97.4 MB in the end (delta: 778.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:35:24,489 INFO L168 Benchmark]: Boogie Preprocessor took 22.50 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 96.1 MB in the end (delta: 657.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:35:24,490 INFO L168 Benchmark]: RCFGBuilder took 452.59 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 82.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:24,491 INFO L168 Benchmark]: TraceAbstraction took 624.69 ms. Allocated memory is still 121.6 MB. Free memory was 82.1 MB in the beginning and 52.7 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:24,491 INFO L168 Benchmark]: Witness Printer took 38.85 ms. Allocated memory is still 121.6 MB. Free memory was 52.1 MB in the beginning and 50.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:35:24,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 90.2 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.43 ms. Allocated memory was 90.2 MB in the beginning and 121.6 MB in the end (delta: 31.5 MB). Free memory was 60.4 MB in the beginning and 98.2 MB in the end (delta: -37.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.62 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 97.4 MB in the end (delta: 778.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.50 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 96.1 MB in the end (delta: 657.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 452.59 ms. Allocated memory is still 121.6 MB. Free memory was 96.1 MB in the beginning and 82.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 624.69 ms. Allocated memory is still 121.6 MB. Free memory was 82.1 MB in the beginning and 52.7 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Witness Printer took 38.85 ms. Allocated memory is still 121.6 MB. Free memory was 52.1 MB in the beginning and 50.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 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 CFG has 3 procedures, 32 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 23 SDslu, 75 SDs, 0 SdLazy, 30 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...