./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d3562c726fb0df5872bc6ae08c11ec0d40862c19 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:36:58,482 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:36:58,483 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:36:58,491 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:36:58,491 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:36:58,492 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:36:58,492 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:36:58,493 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:36:58,494 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:36:58,494 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:36:58,495 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:36:58,495 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:36:58,495 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:36:58,496 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:36:58,496 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:36:58,497 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:36:58,497 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:36:58,498 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:36:58,499 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:36:58,500 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:36:58,501 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:36:58,502 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:36:58,503 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:36:58,503 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:36:58,503 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:36:58,504 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:36:58,505 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:36:58,505 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:36:58,505 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:36:58,506 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:36:58,506 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:36:58,506 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:36:58,507 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:36:58,507 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:36:58,507 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:36:58,507 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:36:58,508 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:36:58,515 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:36:58,515 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:36:58,516 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:36:58,516 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:36:58,516 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:36:58,517 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:36:58,517 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:36:58,517 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:36:58,517 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:36:58,517 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:36:58,517 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:36:58,518 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:36:58,519 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:36:58,519 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:36:58,519 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:36:58,519 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:36:58,519 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:36:58,519 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:36:58,520 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:36:58,520 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:36:58,520 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:36:58,520 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:36:58,520 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:36:58,520 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:36:58,520 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_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/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 ! call(__VERIFIER_error())) ) 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 -> d3562c726fb0df5872bc6ae08c11ec0d40862c19 [2018-11-28 12:36:58,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:36:58,554 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:36:58,556 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:36:58,557 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:36:58,558 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:36:58,558 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/../../sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:36:58,598 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/data/4801c8b8b/c3ce664ec21140848921615e76f7154c/FLAG09a93589e [2018-11-28 12:36:58,896 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:36:58,897 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/sv-benchmarks/c/recursive/Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:36:58,900 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/data/4801c8b8b/c3ce664ec21140848921615e76f7154c/FLAG09a93589e [2018-11-28 12:36:58,909 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/data/4801c8b8b/c3ce664ec21140848921615e76f7154c [2018-11-28 12:36:58,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:36:58,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:36:58,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:36:58,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:36:58,915 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:36:58,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:36:58" (1/1) ... [2018-11-28 12:36:58,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0e4c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:58, skipping insertion in model container [2018-11-28 12:36:58,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:36:58" (1/1) ... [2018-11-28 12:36:58,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:36:58,931 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:36:59,022 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:36:59,024 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:36:59,033 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:36:59,042 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:36:59,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59 WrapperNode [2018-11-28 12:36:59,042 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:36:59,043 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:36:59,043 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:36:59,043 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:36:59,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,051 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,055 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:36:59,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:36:59,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:36:59,055 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:36:59,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,065 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... [2018-11-28 12:36:59,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:36:59,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:36:59,066 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:36:59,066 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:36:59,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/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 [2018-11-28 12:36:59,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2018-11-28 12:36:59,142 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2018-11-28 12:36:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-28 12:36:59,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-28 12:36:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:36:59,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:36:59,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-28 12:36:59,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-28 12:36:59,259 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:36:59,259 INFO L280 CfgBuilder]: Removed 0 assue(true) statements. [2018-11-28 12:36:59,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:36:59 BoogieIcfgContainer [2018-11-28 12:36:59,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:36:59,261 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:36:59,261 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:36:59,263 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:36:59,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:36:58" (1/3) ... [2018-11-28 12:36:59,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0fd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:36:59, skipping insertion in model container [2018-11-28 12:36:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:36:59" (2/3) ... [2018-11-28 12:36:59,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f0fd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:36:59, skipping insertion in model container [2018-11-28 12:36:59,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:36:59" (3/3) ... [2018-11-28 12:36:59,265 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci04_false-unreach-call_true-no-overflow_true-termination.c [2018-11-28 12:36:59,272 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:36:59,278 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:36:59,289 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:36:59,311 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:36:59,312 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:36:59,312 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:36:59,312 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:36:59,312 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:36:59,312 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:36:59,312 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:36:59,312 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:36:59,312 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:36:59,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2018-11-28 12:36:59,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-28 12:36:59,329 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:36:59,329 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:36:59,331 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:36:59,336 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:36:59,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2018-11-28 12:36:59,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:36:59,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:36:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,368 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:36:59,368 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:36:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:36:59,514 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:36:59,514 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:36:59,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:36:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:36:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:36:59,534 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2018-11-28 12:36:59,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:36:59,628 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2018-11-28 12:36:59,629 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:36:59,630 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-28 12:36:59,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:36:59,637 INFO L225 Difference]: With dead ends: 35 [2018-11-28 12:36:59,637 INFO L226 Difference]: Without dead ends: 21 [2018-11-28 12:36:59,640 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:36:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-11-28 12:36:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-11-28 12:36:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 12:36:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 12:36:59,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2018-11-28 12:36:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:36:59,668 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 12:36:59,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:36:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 12:36:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-28 12:36:59,669 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:36:59,670 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:36:59,670 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:36:59,670 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:36:59,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2018-11-28 12:36:59,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:36:59,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:36:59,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:36:59,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:36:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:36:59,722 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:36:59,722 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:36:59,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:36:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:36:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:36:59,724 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2018-11-28 12:36:59,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:36:59,802 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2018-11-28 12:36:59,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-28 12:36:59,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-28 12:36:59,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:36:59,803 INFO L225 Difference]: With dead ends: 27 [2018-11-28 12:36:59,803 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:36:59,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:36:59,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:36:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2018-11-28 12:36:59,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-11-28 12:36:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-11-28 12:36:59,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2018-11-28 12:36:59,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:36:59,810 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2018-11-28 12:36:59,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:36:59,810 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2018-11-28 12:36:59,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-11-28 12:36:59,811 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:36:59,811 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:36:59,811 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:36:59,811 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:36:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2018-11-28 12:36:59,811 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:36:59,811 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:36:59,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:36:59,812 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:36:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:36:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 12:36:59,886 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:36:59,886 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:36:59,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:36:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:36:59,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:36:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-28 12:36:59,973 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:36:59,973 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-11-28 12:36:59,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:36:59,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:36:59,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:36:59,974 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 8 states. [2018-11-28 12:37:00,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:37:00,079 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2018-11-28 12:37:00,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:37:00,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2018-11-28 12:37:00,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:37:00,080 INFO L225 Difference]: With dead ends: 38 [2018-11-28 12:37:00,080 INFO L226 Difference]: Without dead ends: 23 [2018-11-28 12:37:00,081 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:37:00,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-11-28 12:37:00,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-11-28 12:37:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-28 12:37:00,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2018-11-28 12:37:00,086 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 26 [2018-11-28 12:37:00,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:37:00,087 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2018-11-28 12:37:00,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:37:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2018-11-28 12:37:00,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-28 12:37:00,088 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:37:00,088 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:37:00,088 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:37:00,088 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:37:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2018-11-28 12:37:00,089 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:37:00,089 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:37:00,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,090 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:37:00,090 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:37:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 12:37:00,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:37:00,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:37:00,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:37:00,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:37:00,163 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:37:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-11-28 12:37:00,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:37:00,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-11-28 12:37:00,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:37:00,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:37:00,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:37:00,188 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2018-11-28 12:37:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:37:00,234 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2018-11-28 12:37:00,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:37:00,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2018-11-28 12:37:00,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:37:00,235 INFO L225 Difference]: With dead ends: 32 [2018-11-28 12:37:00,236 INFO L226 Difference]: Without dead ends: 28 [2018-11-28 12:37:00,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:37:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-11-28 12:37:00,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-11-28 12:37:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-28 12:37:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-11-28 12:37:00,242 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 27 [2018-11-28 12:37:00,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:37:00,243 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2018-11-28 12:37:00,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:37:00,243 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2018-11-28 12:37:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-28 12:37:00,244 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:37:00,244 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:37:00,244 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:37:00,244 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:37:00,244 INFO L82 PathProgramCache]: Analyzing trace with hash -111055954, now seen corresponding path program 2 times [2018-11-28 12:37:00,245 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:37:00,245 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:37:00,245 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,245 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:37:00,246 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:37:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-28 12:37:00,313 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:37:00,313 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:37:00,331 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:37:00,345 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:37:00,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:37:00,347 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:37:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2018-11-28 12:37:00,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:37:00,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2018-11-28 12:37:00,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:37:00,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:37:00,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:37:00,420 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand 9 states. [2018-11-28 12:37:00,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:37:00,525 INFO L93 Difference]: Finished difference Result 42 states and 62 transitions. [2018-11-28 12:37:00,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:37:00,526 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 40 [2018-11-28 12:37:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:37:00,527 INFO L225 Difference]: With dead ends: 42 [2018-11-28 12:37:00,527 INFO L226 Difference]: Without dead ends: 36 [2018-11-28 12:37:00,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:37:00,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-28 12:37:00,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2018-11-28 12:37:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-11-28 12:37:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 49 transitions. [2018-11-28 12:37:00,535 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 49 transitions. Word has length 40 [2018-11-28 12:37:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:37:00,535 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 49 transitions. [2018-11-28 12:37:00,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:37:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 49 transitions. [2018-11-28 12:37:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 12:37:00,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:37:00,537 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:37:00,537 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:37:00,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:37:00,538 INFO L82 PathProgramCache]: Analyzing trace with hash -987229488, now seen corresponding path program 3 times [2018-11-28 12:37:00,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:37:00,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:37:00,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:37:00,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:37:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 176 proven. 28 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2018-11-28 12:37:00,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:37:00,664 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:37:00,671 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:37:00,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-28 12:37:00,699 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:37:00,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:37:00,761 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2018-11-28 12:37:00,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:37:00,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 12 [2018-11-28 12:37:00,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:37:00,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:37:00,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:37:00,793 INFO L87 Difference]: Start difference. First operand 33 states and 49 transitions. Second operand 12 states. [2018-11-28 12:37:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:37:00,998 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2018-11-28 12:37:00,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:37:00,999 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 96 [2018-11-28 12:37:00,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:37:01,001 INFO L225 Difference]: With dead ends: 76 [2018-11-28 12:37:01,001 INFO L226 Difference]: Without dead ends: 49 [2018-11-28 12:37:01,002 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2018-11-28 12:37:01,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-28 12:37:01,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2018-11-28 12:37:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-11-28 12:37:01,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 63 transitions. [2018-11-28 12:37:01,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 63 transitions. Word has length 96 [2018-11-28 12:37:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:37:01,012 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 63 transitions. [2018-11-28 12:37:01,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:37:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 63 transitions. [2018-11-28 12:37:01,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2018-11-28 12:37:01,014 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:37:01,014 INFO L402 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:37:01,016 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:37:01,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:37:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash 172858432, now seen corresponding path program 4 times [2018-11-28 12:37:01,017 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:37:01,017 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:37:01,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:01,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:37:01,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:37:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 128 proven. 66 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2018-11-28 12:37:01,126 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:37:01,127 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:37:01,136 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:37:01,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:37:01,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:37:01,157 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:37:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2018-11-28 12:37:01,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:37:01,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-11-28 12:37:01,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:37:01,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:37:01,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:37:01,225 INFO L87 Difference]: Start difference. First operand 43 states and 63 transitions. Second operand 14 states. [2018-11-28 12:37:01,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:37:01,467 INFO L93 Difference]: Finished difference Result 112 states and 199 transitions. [2018-11-28 12:37:01,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-28 12:37:01,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2018-11-28 12:37:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:37:01,468 INFO L225 Difference]: With dead ends: 112 [2018-11-28 12:37:01,468 INFO L226 Difference]: Without dead ends: 52 [2018-11-28 12:37:01,469 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2018-11-28 12:37:01,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-11-28 12:37:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-11-28 12:37:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-11-28 12:37:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2018-11-28 12:37:01,473 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 96 [2018-11-28 12:37:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:37:01,473 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2018-11-28 12:37:01,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:37:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2018-11-28 12:37:01,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2018-11-28 12:37:01,474 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:37:01,474 INFO L402 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:37:01,474 INFO L423 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:37:01,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:37:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 580129251, now seen corresponding path program 5 times [2018-11-28 12:37:01,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:37:01,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:37:01,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:01,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:37:01,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:37:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:37:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:37:01,524 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:37:01,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:37:01 BoogieIcfgContainer [2018-11-28 12:37:01,554 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:37:01,554 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:37:01,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:37:01,555 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:37:01,555 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:36:59" (3/4) ... [2018-11-28 12:37:01,557 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 12:37:01,597 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_8d6ed0cf-12e9-4597-8404-6a873e0a7d7e/bin-2019/uautomizer/witness.graphml [2018-11-28 12:37:01,597 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:37:01,597 INFO L168 Benchmark]: Toolchain (without parser) took 2686.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 956.0 MB in the beginning and 1.0 GB in the end (delta: -50.9 MB). Peak memory consumption was 78.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:37:01,598 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: CACSL2BoogieTranslator took 130.29 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.13 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: Boogie Preprocessor took 11.00 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: RCFGBuilder took 193.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -168.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: TraceAbstraction took 2293.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 102.3 MB). Peak memory consumption was 102.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:37:01,599 INFO L168 Benchmark]: Witness Printer took 42.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. [2018-11-28 12:37:01,600 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 130.29 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 12.13 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.00 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 193.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -168.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2293.66 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 102.3 MB). Peak memory consumption was 102.3 MB. Max. memory is 11.5 GB. * Witness Printer took 42.41 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.0 MB). Peak memory consumption was 5.0 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L28] int x = __VERIFIER_nondet_int(); [L29] CALL, EXPR fibonacci(x) VAL [\old(n)=5] [L17] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=4] [L17] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=4, fibonacci(n-1)=2, n=4] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=4, fibonacci(n-1)=2, fibonacci(n-2)=1, n=4] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=5, fibonacci(n-1)=3, n=5] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=3] [L17] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=2] [L17] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR fibonacci(n-1) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=2, fibonacci(n-1)=1, n=2] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=0] [L17] COND TRUE n < 1 [L18] return 0; VAL [\old(n)=0, \result=0, n=0] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=2, fibonacci(n-1)=1, fibonacci(n-2)=0, n=2] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-1) VAL [\old(n)=3, fibonacci(n-1)=1, n=3] [L22] CALL, EXPR fibonacci(n-2) VAL [\old(n)=1] [L17] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=3, fibonacci(n-1)=1, fibonacci(n-2)=1, n=3] [L22] return fibonacci(n-1) + fibonacci(n-2); [L22] RET, EXPR fibonacci(n-2) VAL [\old(n)=5, fibonacci(n-1)=3, fibonacci(n-2)=2, n=5] [L22] return fibonacci(n-1) + fibonacci(n-2); [L29] RET, EXPR fibonacci(x) VAL [fibonacci(x)=5, x=5] [L29] int result = fibonacci(x); [L30] COND FALSE !(x != 5 || result == 3) VAL [result=5, x=5] [L33] __VERIFIER_error() VAL [result=5, x=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. UNSAFE Result, 2.2s OverallTime, 8 OverallIterations, 15 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 136 SDtfs, 150 SDslu, 390 SDs, 0 SdLazy, 580 SolverSat, 211 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 369 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=7, 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, 7 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 706 NumberOfCodeBlocks, 658 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 585 ConstructedInterpolants, 0 QuantifiedInterpolants, 68699 SizeOfPredicates, 19 NumberOfNonLiveVariables, 538 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 1525/1852 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...