./Ultimate.py --spec ../../sv-benchmarks/c/NoOverflows.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a_false-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a_false-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 ......................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 09:41:58,309 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 09:41:58,310 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 09:41:58,319 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 09:41:58,319 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 09:41:58,320 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 09:41:58,321 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 09:41:58,323 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 09:41:58,324 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 09:41:58,325 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 09:41:58,325 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 09:41:58,326 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 09:41:58,327 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 09:41:58,327 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 09:41:58,328 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 09:41:58,329 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 09:41:58,330 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 09:41:58,331 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 09:41:58,332 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 09:41:58,333 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 09:41:58,334 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 09:41:58,335 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 09:41:58,337 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 09:41:58,337 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 09:41:58,337 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 09:41:58,338 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 09:41:58,339 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 09:41:58,339 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 09:41:58,340 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 09:41:58,341 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 09:41:58,341 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 09:41:58,342 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 09:41:58,342 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 09:41:58,342 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 09:41:58,343 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 09:41:58,344 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 09:41:58,344 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2018-11-18 09:41:58,351 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 09:41:58,351 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 09:41:58,351 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 09:41:58,352 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-18 09:41:58,352 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 09:41:58,352 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 09:41:58,352 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 09:41:58,352 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 09:41:58,352 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 09:41:58,353 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-18 09:41:58,354 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 09:41:58,354 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-18 09:41:58,354 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 09:41:58,355 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 09:41:58,355 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 09:41:58,355 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a87305f2bf70381ae4b40b8cfb9e2ca1c7e8a065 [2018-11-18 09:41:58,376 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 09:41:58,384 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 09:41:58,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 09:41:58,387 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 09:41:58,387 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 09:41:58,388 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2a_false-no-overflow.c [2018-11-18 09:41:58,425 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/data/91baa16c5/cd3258956c2547e8a47e94bb6f035537/FLAG779767b80 [2018-11-18 09:41:58,818 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 09:41:58,818 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/sv-benchmarks/c/termination-crafted/NestedRecursion_2a_false-no-overflow.c [2018-11-18 09:41:58,822 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/data/91baa16c5/cd3258956c2547e8a47e94bb6f035537/FLAG779767b80 [2018-11-18 09:41:58,833 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/data/91baa16c5/cd3258956c2547e8a47e94bb6f035537 [2018-11-18 09:41:58,835 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 09:41:58,836 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-18 09:41:58,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 09:41:58,837 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 09:41:58,840 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 09:41:58,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6031922f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58, skipping insertion in model container [2018-11-18 09:41:58,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 09:41:58,859 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 09:41:58,953 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:41:58,955 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 09:41:58,963 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 09:41:58,971 INFO L195 MainTranslator]: Completed translation [2018-11-18 09:41:58,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58 WrapperNode [2018-11-18 09:41:58,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 09:41:58,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 09:41:58,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 09:41:58,972 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 09:41:58,979 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... [2018-11-18 09:41:58,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 09:41:58,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 09:41:58,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 09:41:58,988 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 09:41:58,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/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 [2018-11-18 09:41:59,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 09:41:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 09:41:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-18 09:41:59,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 09:41:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2018-11-18 09:41:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-18 09:41:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 09:41:59,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 09:41:59,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 09:41:59,158 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 09:41:59,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:41:59 BoogieIcfgContainer [2018-11-18 09:41:59,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 09:41:59,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 09:41:59,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 09:41:59,162 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 09:41:59,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:41:58" (1/3) ... [2018-11-18 09:41:59,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77deff66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:41:59, skipping insertion in model container [2018-11-18 09:41:59,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:41:58" (2/3) ... [2018-11-18 09:41:59,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77deff66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:41:59, skipping insertion in model container [2018-11-18 09:41:59,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:41:59" (3/3) ... [2018-11-18 09:41:59,165 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2a_false-no-overflow.c [2018-11-18 09:41:59,170 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 09:41:59,175 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2018-11-18 09:41:59,185 INFO L257 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2018-11-18 09:41:59,204 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 09:41:59,204 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 09:41:59,204 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-18 09:41:59,204 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 09:41:59,204 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 09:41:59,205 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 09:41:59,205 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 09:41:59,205 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 09:41:59,205 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 09:41:59,217 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-18 09:41:59,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-11-18 09:41:59,221 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:41:59,222 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:41:59,223 INFO L423 AbstractCegarLoop]: === Iteration 1 === [gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:41:59,227 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:41:59,227 INFO L82 PathProgramCache]: Analyzing trace with hash -933759218, now seen corresponding path program 1 times [2018-11-18 09:41:59,229 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:41:59,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:41:59,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:41:59,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:41:59,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:41:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 09:41:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 09:41:59,352 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 09:41:59,353 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 09:41:59,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 09:41:59,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 09:41:59,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 09:41:59,367 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-18 09:41:59,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 09:41:59,457 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2018-11-18 09:41:59,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 09:41:59,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2018-11-18 09:41:59,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 09:41:59,465 INFO L225 Difference]: With dead ends: 37 [2018-11-18 09:41:59,465 INFO L226 Difference]: Without dead ends: 31 [2018-11-18 09:41:59,468 INFO L604 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 [2018-11-18 09:41:59,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-11-18 09:41:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-11-18 09:41:59,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-18 09:41:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2018-11-18 09:41:59,499 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 9 [2018-11-18 09:41:59,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 09:41:59,499 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2018-11-18 09:41:59,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 09:41:59,499 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2018-11-18 09:41:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-18 09:41:59,499 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 09:41:59,499 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 09:41:59,500 INFO L423 AbstractCegarLoop]: === Iteration 2 === [gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-11-18 09:41:59,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 09:41:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1118235353, now seen corresponding path program 1 times [2018-11-18 09:41:59,500 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 09:41:59,500 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 09:41:59,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:41:59,501 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 09:41:59,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 09:41:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:41:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 09:41:59,522 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-18 09:41:59,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 09:41:59 BoogieIcfgContainer [2018-11-18 09:41:59,535 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 09:41:59,535 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 09:41:59,535 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 09:41:59,535 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 09:41:59,536 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:41:59" (3/4) ... [2018-11-18 09:41:59,537 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-18 09:41:59,560 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_53a0a23c-4d75-46bc-822f-acebadf37542/bin-2019/uautomizer/witness.graphml [2018-11-18 09:41:59,560 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 09:41:59,561 INFO L168 Benchmark]: Toolchain (without parser) took 725.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 959.2 MB in the beginning and 1.1 GB in the end (delta: -155.4 MB). Peak memory consumption was 10.2 MB. Max. memory is 11.5 GB. [2018-11-18 09:41:59,562 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:41:59,562 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.50 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:41:59,562 INFO L168 Benchmark]: Boogie Preprocessor took 16.15 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:41:59,563 INFO L168 Benchmark]: RCFGBuilder took 170.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -206.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-11-18 09:41:59,563 INFO L168 Benchmark]: TraceAbstraction took 375.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. [2018-11-18 09:41:59,564 INFO L168 Benchmark]: Witness Printer took 25.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 09:41:59,565 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 134.50 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.15 ms. Allocated memory is still 1.0 GB. Free memory is still 948.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 170.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.8 MB in the beginning and 1.2 GB in the end (delta: -206.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 375.31 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 11.5 GB. * Witness Printer took 25.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: integer overflow possible integer overflow possible We found a FailurePath: [L19] int x = __VERIFIER_nondet_int(); [L20] CALL g(x) VAL [\old(x)=-2147483648] [L12] COND FALSE !(x == 0) VAL [\old(x)=-2147483648, x=-2147483648] [L15] x - 1 VAL [\old(x)=-2147483648, x=-2147483648] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 2 error locations. UNSAFE Result, 0.3s OverallTime, 2 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 19 SDtfs, 19 SDslu, 49 SDs, 0 SdLazy, 29 SolverSat, 9 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=28occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 128 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...