./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/Fibonacci02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/Fibonacci02.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:35:59,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:35:59,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:35:59,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:35:59,691 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:35:59,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:35:59,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:35:59,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:35:59,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:35:59,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:35:59,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:35:59,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:35:59,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:35:59,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:35:59,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:35:59,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:35:59,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:35:59,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:35:59,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:35:59,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:35:59,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:35:59,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:35:59,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:35:59,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:35:59,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:35:59,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:35:59,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:35:59,761 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:35:59,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:35:59,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:35:59,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:35:59,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:35:59,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:35:59,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:35:59,770 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:35:59,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:35:59,771 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:35:59,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:35:59,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:35:59,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:35:59,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:35:59,777 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-13 01:35:59,817 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:35:59,818 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:35:59,819 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:35:59,819 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:35:59,820 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:35:59,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:35:59,820 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:35:59,820 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:35:59,827 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:35:59,827 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:35:59,828 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:35:59,828 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:35:59,828 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:35:59,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:35:59,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:35:59,829 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:35:59,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:35:59,830 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:35:59,831 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 01:35:59,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:35:59,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:35:59,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:35:59,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:35:59,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:35:59,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:35:59,832 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-13 01:35:59,833 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:35:59,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:35:59,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:35:59,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:35:59,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:35:59,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:35:59,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:35:59,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:35:59,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:35:59,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:35:59,837 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:35:59,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:35:59,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:35:59,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:35:59,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:35:59,838 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7261cadd839cd02322bb28945f92ad1bd2170c0a65dd385996b5ff81cbb1de7 [2021-11-13 01:36:00,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:36:00,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:36:00,131 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:36:00,133 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:36:00,133 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:36:00,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/recursive/Fibonacci02.c [2021-11-13 01:36:00,223 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/data/d38853045/38c59356489a47c59f64e3ad69cc1625/FLAGda044e076 [2021-11-13 01:36:00,733 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:36:00,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/sv-benchmarks/c/recursive/Fibonacci02.c [2021-11-13 01:36:00,745 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/data/d38853045/38c59356489a47c59f64e3ad69cc1625/FLAGda044e076 [2021-11-13 01:36:01,106 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/data/d38853045/38c59356489a47c59f64e3ad69cc1625 [2021-11-13 01:36:01,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:36:01,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:36:01,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:01,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:36:01,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:36:01,135 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a2eefd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01, skipping insertion in model container [2021-11-13 01:36:01,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:36:01,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:36:01,334 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-11-13 01:36:01,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:01,346 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:36:01,379 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/sv-benchmarks/c/recursive/Fibonacci02.c[715,728] [2021-11-13 01:36:01,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:36:01,399 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:36:01,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01 WrapperNode [2021-11-13 01:36:01,400 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:36:01,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:01,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:36:01,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:36:01,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,415 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:36:01,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:36:01,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:36:01,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:36:01,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,457 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:36:01,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:36:01,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:36:01,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:36:01,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (1/1) ... [2021-11-13 01:36:01,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:36:01,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:01,506 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:36:01,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:36:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2021-11-13 01:36:01,560 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2021-11-13 01:36:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:36:01,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:36:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:36:01,561 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:36:01,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:36:01,889 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 01:36:01,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:01 BoogieIcfgContainer [2021-11-13 01:36:01,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:36:01,896 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:36:01,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:36:01,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:36:01,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:36:01" (1/3) ... [2021-11-13 01:36:01,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:01, skipping insertion in model container [2021-11-13 01:36:01,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:36:01" (2/3) ... [2021-11-13 01:36:01,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c3f7691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:36:01, skipping insertion in model container [2021-11-13 01:36:01,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:01" (3/3) ... [2021-11-13 01:36:01,911 INFO L111 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2021-11-13 01:36:01,917 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:36:01,921 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-13 01:36:01,979 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:36:01,988 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 01:36:01,988 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-13 01:36:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-13 01:36:02,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-13 01:36:02,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:02,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-13 01:36:02,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:02,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1991701821, now seen corresponding path program 1 times [2021-11-13 01:36:02,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:02,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813797775] [2021-11-13 01:36:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:02,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:02,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813797775] [2021-11-13 01:36:02,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813797775] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:02,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:02,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:36:02,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028348011] [2021-11-13 01:36:02,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:02,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:02,302 INFO L87 Difference]: Start difference. First operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:02,405 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-13 01:36:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:02,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-13 01:36:02,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:02,418 INFO L225 Difference]: With dead ends: 25 [2021-11-13 01:36:02,418 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 01:36:02,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:36:02,427 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.15ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.08ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.55ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:02,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 19 Invalid, 46 Unknown, 0 Unchecked, 3.08ms Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 59.55ms Time] [2021-11-13 01:36:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 01:36:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-13 01:36:02,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-13 01:36:02,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2021-11-13 01:36:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:02,475 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-13 01:36:02,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-13 01:36:02,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 01:36:02,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:02,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:02,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:36:02,478 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:02,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1613214265, now seen corresponding path program 1 times [2021-11-13 01:36:02,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:02,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353378309] [2021-11-13 01:36:02,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:02,521 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:02,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353378309] [2021-11-13 01:36:02,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353378309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:02,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:02,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 01:36:02,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079368848] [2021-11-13 01:36:02,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:02,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:36:02,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:02,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:36:02,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:36:02,526 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:02,549 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-11-13 01:36:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:36:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-13 01:36:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:02,552 INFO L225 Difference]: With dead ends: 23 [2021-11-13 01:36:02,552 INFO L226 Difference]: Without dead ends: 21 [2021-11-13 01:36:02,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:36:02,555 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:02,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 1.05ms Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 15.53ms Time] [2021-11-13 01:36:02,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-13 01:36:02,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2021-11-13 01:36:02,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-13 01:36:02,566 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2021-11-13 01:36:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-13 01:36:02,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:36:02,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-13 01:36:02,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 01:36:02,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:02,569 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:02,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:36:02,570 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:02,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,571 INFO L85 PathProgramCache]: Analyzing trace with hash -796740598, now seen corresponding path program 1 times [2021-11-13 01:36:02,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:02,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591277719] [2021-11-13 01:36:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:36:02,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:02,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591277719] [2021-11-13 01:36:02,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591277719] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:02,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:02,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:36:02,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491686389] [2021-11-13 01:36:02,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:02,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:02,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:02,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:02,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:02,677 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:02,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:02,739 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-11-13 01:36:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-13 01:36:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:02,742 INFO L225 Difference]: With dead ends: 35 [2021-11-13 01:36:02,743 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 01:36:02,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:02,745 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.18ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:02,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 30 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 50.18ms Time] [2021-11-13 01:36:02,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 01:36:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-13 01:36:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 01:36:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-11-13 01:36:02,771 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2021-11-13 01:36:02,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:02,772 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-11-13 01:36:02,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-11-13 01:36:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-13 01:36:02,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:02,775 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:02,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 01:36:02,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1082308036, now seen corresponding path program 1 times [2021-11-13 01:36:02,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:02,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234499838] [2021-11-13 01:36:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 01:36:02,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:02,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234499838] [2021-11-13 01:36:02,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234499838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:02,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109847312] [2021-11-13 01:36:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:02,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:02,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:02,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:36:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:03,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:36:03,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:03,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:03,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109847312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:03,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [913091878] [2021-11-13 01:36:03,604 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-13 01:36:03,605 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:03,611 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:03,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:03,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2021-11-13 01:36:03,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737403294] [2021-11-13 01:36:03,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:03,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 01:36:03,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 01:36:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:36:03,617 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 01:36:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:04,257 INFO L93 Difference]: Finished difference Result 177 states and 247 transitions. [2021-11-13 01:36:04,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 01:36:04,258 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2021-11-13 01:36:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:04,271 INFO L225 Difference]: With dead ends: 177 [2021-11-13 01:36:04,272 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 01:36:04,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:36:04,283 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 201 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 319.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.37ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 399.55ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:04,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 238 Invalid, 556 Unknown, 0 Unchecked, 13.37ms Time], IncrementalHoareTripleChecker [81 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 399.55ms Time] [2021-11-13 01:36:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 01:36:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2021-11-13 01:36:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 101 states have internal predecessors, (110), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (46), 21 states have call predecessors, (46), 16 states have call successors, (46) [2021-11-13 01:36:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2021-11-13 01:36:04,331 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 29 [2021-11-13 01:36:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:04,332 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2021-11-13 01:36:04,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 01:36:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2021-11-13 01:36:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 01:36:04,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:04,336 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:04,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:04,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:04,553 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:04,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:04,554 INFO L85 PathProgramCache]: Analyzing trace with hash 57867452, now seen corresponding path program 2 times [2021-11-13 01:36:04,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:04,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073721560] [2021-11-13 01:36:04,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:04,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 01:36:04,687 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:04,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073721560] [2021-11-13 01:36:04,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073721560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547392646] [2021-11-13 01:36:04,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:36:04,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:04,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:04,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:36:04,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 01:36:04,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:36:04,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 01:36:04,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 01:36:05,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547392646] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:05,094 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:36:05,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5] total 9 [2021-11-13 01:36:05,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28725835] [2021-11-13 01:36:05,094 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:05,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:36:05,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:36:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 01:36:05,096 INFO L87 Difference]: Start difference. First operand 128 states and 173 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 01:36:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:05,161 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2021-11-13 01:36:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:36:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-13 01:36:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:05,170 INFO L225 Difference]: With dead ends: 142 [2021-11-13 01:36:05,170 INFO L226 Difference]: Without dead ends: 141 [2021-11-13 01:36:05,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:36:05,172 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.37ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.40ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:05,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 37 Unknown, 0 Unchecked, 1.37ms Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 32.40ms Time] [2021-11-13 01:36:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-13 01:36:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2021-11-13 01:36:05,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (46), 23 states have call predecessors, (46), 16 states have call successors, (46) [2021-11-13 01:36:05,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2021-11-13 01:36:05,226 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 41 [2021-11-13 01:36:05,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:05,227 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2021-11-13 01:36:05,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 01:36:05,227 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2021-11-13 01:36:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 01:36:05,241 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:05,241 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:05,284 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 01:36:05,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:05,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1793891066, now seen corresponding path program 1 times [2021-11-13 01:36:05,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:05,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030262610] [2021-11-13 01:36:05,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:05,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 01:36:05,537 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:05,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030262610] [2021-11-13 01:36:05,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030262610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:05,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537054163] [2021-11-13 01:36:05,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:05,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:05,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:05,539 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:36:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:05,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 01:36:05,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:05,850 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:36:05,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:06,151 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 01:36:06,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537054163] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:06,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955600333] [2021-11-13 01:36:06,160 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:06,161 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:06,162 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:06,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:06,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 25 [2021-11-13 01:36:06,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058961430] [2021-11-13 01:36:06,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:06,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:36:06,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:06,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:36:06,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:36:06,174 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 25 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 12 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 01:36:07,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:07,415 INFO L93 Difference]: Finished difference Result 423 states and 639 transitions. [2021-11-13 01:36:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 01:36:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 12 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2021-11-13 01:36:07,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:07,420 INFO L225 Difference]: With dead ends: 423 [2021-11-13 01:36:07,420 INFO L226 Difference]: Without dead ends: 305 [2021-11-13 01:36:07,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 01:36:07,425 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 275 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 663.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.58ms SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 811.16ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:07,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 520 Invalid, 1256 Unknown, 0 Unchecked, 14.58ms Time], IncrementalHoareTripleChecker [134 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 811.16ms Time] [2021-11-13 01:36:07,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-13 01:36:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 270. [2021-11-13 01:36:07,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 212 states have (on average 1.099056603773585) internal successors, (233), 212 states have internal predecessors, (233), 34 states have call successors, (34), 10 states have call predecessors, (34), 22 states have return successors, (103), 47 states have call predecessors, (103), 33 states have call successors, (103) [2021-11-13 01:36:07,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 370 transitions. [2021-11-13 01:36:07,469 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 370 transitions. Word has length 42 [2021-11-13 01:36:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:07,469 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 370 transitions. [2021-11-13 01:36:07,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 18 states have internal predecessors, (71), 12 states have call successors, (15), 9 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 01:36:07,470 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 370 transitions. [2021-11-13 01:36:07,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-13 01:36:07,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:07,473 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:07,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:07,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:07,696 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1878356481, now seen corresponding path program 1 times [2021-11-13 01:36:07,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:07,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378785925] [2021-11-13 01:36:07,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:07,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-11-13 01:36:07,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:07,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378785925] [2021-11-13 01:36:07,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378785925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:36:07,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:36:07,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:36:07,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603987173] [2021-11-13 01:36:07,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:36:07,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:36:07,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:07,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:36:07,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:07,854 INFO L87 Difference]: Start difference. First operand 270 states and 370 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:07,912 INFO L93 Difference]: Finished difference Result 287 states and 393 transitions. [2021-11-13 01:36:07,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:36:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2021-11-13 01:36:07,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:07,925 INFO L225 Difference]: With dead ends: 287 [2021-11-13 01:36:07,925 INFO L226 Difference]: Without dead ends: 285 [2021-11-13 01:36:07,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:36:07,927 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.50ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:07,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 94 Invalid, 46 Unknown, 0 Unchecked, 2.58ms Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 35.50ms Time] [2021-11-13 01:36:07,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-13 01:36:07,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 277. [2021-11-13 01:36:07,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 218 states have (on average 1.0963302752293578) internal successors, (239), 217 states have internal predecessors, (239), 35 states have call successors, (35), 10 states have call predecessors, (35), 22 states have return successors, (109), 49 states have call predecessors, (109), 34 states have call successors, (109) [2021-11-13 01:36:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 383 transitions. [2021-11-13 01:36:07,998 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 383 transitions. Word has length 72 [2021-11-13 01:36:08,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:08,002 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 383 transitions. [2021-11-13 01:36:08,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 01:36:08,003 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 383 transitions. [2021-11-13 01:36:08,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-13 01:36:08,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:08,011 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 10, 10, 10, 10, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-13 01:36:08,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 01:36:08,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:08,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1629889833, now seen corresponding path program 1 times [2021-11-13 01:36:08,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:08,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859331375] [2021-11-13 01:36:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:08,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:08,116 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-11-13 01:36:08,117 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:08,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859331375] [2021-11-13 01:36:08,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859331375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:08,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830948407] [2021-11-13 01:36:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:08,118 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:08,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:08,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:08,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:36:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:08,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 01:36:08,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 178 proven. 184 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-13 01:36:08,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 52 proven. 330 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 01:36:09,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830948407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:09,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784234602] [2021-11-13 01:36:09,174 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:09,174 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:09,174 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:09,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:09,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 21, 21] total 25 [2021-11-13 01:36:09,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669586467] [2021-11-13 01:36:09,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 01:36:09,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 01:36:09,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-11-13 01:36:09,179 INFO L87 Difference]: Start difference. First operand 277 states and 383 transitions. Second operand has 25 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (17), 10 states have call predecessors, (17), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:09,904 INFO L93 Difference]: Finished difference Result 601 states and 874 transitions. [2021-11-13 01:36:09,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 01:36:09,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (17), 10 states have call predecessors, (17), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 99 [2021-11-13 01:36:09,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:09,911 INFO L225 Difference]: With dead ends: 601 [2021-11-13 01:36:09,911 INFO L226 Difference]: Without dead ends: 338 [2021-11-13 01:36:09,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=996, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 01:36:09,921 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 327 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 338.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.31ms SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 492.87ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:09,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 423 Invalid, 761 Unknown, 0 Unchecked, 6.31ms Time], IncrementalHoareTripleChecker [109 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 492.87ms Time] [2021-11-13 01:36:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-13 01:36:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 305. [2021-11-13 01:36:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 240 states have (on average 1.0958333333333334) internal successors, (263), 239 states have internal predecessors, (263), 39 states have call successors, (39), 11 states have call predecessors, (39), 24 states have return successors, (124), 54 states have call predecessors, (124), 38 states have call successors, (124) [2021-11-13 01:36:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 426 transitions. [2021-11-13 01:36:09,966 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 426 transitions. Word has length 99 [2021-11-13 01:36:09,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:09,967 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 426 transitions. [2021-11-13 01:36:09,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 17 states have internal predecessors, (83), 12 states have call successors, (17), 10 states have call predecessors, (17), 4 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 426 transitions. [2021-11-13 01:36:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-13 01:36:09,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:09,972 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:10,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:10,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 01:36:10,196 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 442857087, now seen corresponding path program 2 times [2021-11-13 01:36:10,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:10,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157167596] [2021-11-13 01:36:10,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:10,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:10,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 178 proven. 119 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 01:36:10,483 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:10,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157167596] [2021-11-13 01:36:10,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157167596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:10,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601476820] [2021-11-13 01:36:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:36:10,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:10,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:10,485 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:10,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 01:36:10,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 01:36:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:10,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 01:36:10,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-13 01:36:10,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:11,215 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 44 proven. 3 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-11-13 01:36:11,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601476820] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:11,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1833331733] [2021-11-13 01:36:11,219 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:11,219 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:11,220 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:11,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:11,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 7, 7] total 27 [2021-11-13 01:36:11,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878087116] [2021-11-13 01:36:11,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:11,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 01:36:11,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:11,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 01:36:11,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2021-11-13 01:36:11,225 INFO L87 Difference]: Start difference. First operand 305 states and 426 transitions. Second operand has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:12,074 INFO L93 Difference]: Finished difference Result 464 states and 643 transitions. [2021-11-13 01:36:12,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 01:36:12,078 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 85 [2021-11-13 01:36:12,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:12,084 INFO L225 Difference]: With dead ends: 464 [2021-11-13 01:36:12,085 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 01:36:12,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=585, Invalid=1485, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 01:36:12,092 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 503 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.09ms SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 409.15ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:12,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 140 Invalid, 669 Unknown, 0 Unchecked, 10.09ms Time], IncrementalHoareTripleChecker [124 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 409.15ms Time] [2021-11-13 01:36:12,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 01:36:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2021-11-13 01:36:12,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.141732283464567) internal successors, (145), 128 states have internal predecessors, (145), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 01:36:12,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 186 transitions. [2021-11-13 01:36:12,107 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 186 transitions. Word has length 85 [2021-11-13 01:36:12,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:12,109 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 186 transitions. [2021-11-13 01:36:12,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.269230769230769) internal successors, (85), 19 states have internal predecessors, (85), 12 states have call successors, (16), 9 states have call predecessors, (16), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:12,110 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 186 transitions. [2021-11-13 01:36:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 01:36:12,115 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:12,115 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 8, 8, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 01:36:12,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:12,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:12,328 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:12,329 INFO L85 PathProgramCache]: Analyzing trace with hash 241353604, now seen corresponding path program 3 times [2021-11-13 01:36:12,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:12,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841758610] [2021-11-13 01:36:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:12,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:12,452 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-13 01:36:12,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:12,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841758610] [2021-11-13 01:36:12,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841758610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:12,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477289867] [2021-11-13 01:36:12,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:36:12,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:12,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:12,455 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:12,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 01:36:12,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:36:12,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:12,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 01:36:12,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:12,829 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-13 01:36:12,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-13 01:36:13,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477289867] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:13,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1215934884] [2021-11-13 01:36:13,165 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:13,165 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:13,165 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:13,167 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:13,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2021-11-13 01:36:13,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418629936] [2021-11-13 01:36:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:13,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 01:36:13,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:13,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 01:36:13,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-11-13 01:36:13,170 INFO L87 Difference]: Start difference. First operand 161 states and 186 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:13,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:13,289 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2021-11-13 01:36:13,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 01:36:13,290 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 79 [2021-11-13 01:36:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:13,292 INFO L225 Difference]: With dead ends: 164 [2021-11-13 01:36:13,293 INFO L226 Difference]: Without dead ends: 162 [2021-11-13 01:36:13,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-13 01:36:13,294 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.50ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 68.69ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:13,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 133 Invalid, 95 Unknown, 0 Unchecked, 1.50ms Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 68.69ms Time] [2021-11-13 01:36:13,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-13 01:36:13,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-13 01:36:13,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 128 states have internal predecessors, (142), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 01:36:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-11-13 01:36:13,306 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 79 [2021-11-13 01:36:13,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:13,307 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-11-13 01:36:13,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-13 01:36:13,307 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-11-13 01:36:13,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-13 01:36:13,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:13,309 INFO L514 BasicCegarLoop]: trace histogram [14, 12, 9, 9, 9, 9, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2021-11-13 01:36:13,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:13,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 01:36:13,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:13,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:13,524 INFO L85 PathProgramCache]: Analyzing trace with hash -411533489, now seen corresponding path program 1 times [2021-11-13 01:36:13,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:13,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871333254] [2021-11-13 01:36:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:13,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:13,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2021-11-13 01:36:13,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:13,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871333254] [2021-11-13 01:36:13,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871333254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:13,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399827518] [2021-11-13 01:36:13,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:13,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:13,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:13,773 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:13,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 01:36:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 01:36:13,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 30 proven. 44 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2021-11-13 01:36:14,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-13 01:36:14,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399827518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:14,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1406431845] [2021-11-13 01:36:14,938 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:14,938 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:14,938 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:14,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:14,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 25 [2021-11-13 01:36:14,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581182386] [2021-11-13 01:36:14,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-13 01:36:14,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-13 01:36:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-11-13 01:36:14,943 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-13 01:36:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:15,065 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-11-13 01:36:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 01:36:15,066 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) Word has length 113 [2021-11-13 01:36:15,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:15,068 INFO L225 Difference]: With dead ends: 161 [2021-11-13 01:36:15,068 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 01:36:15,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2021-11-13 01:36:15,070 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.69ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.53ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:15,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 137 Invalid, 128 Unknown, 0 Unchecked, 1.69ms Time], IncrementalHoareTripleChecker [20 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 70.53ms Time] [2021-11-13 01:36:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 01:36:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-13 01:36:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 126 states have internal predecessors, (133), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 01:36:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 174 transitions. [2021-11-13 01:36:15,081 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 174 transitions. Word has length 113 [2021-11-13 01:36:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:15,081 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 174 transitions. [2021-11-13 01:36:15,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2021-11-13 01:36:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 174 transitions. [2021-11-13 01:36:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-13 01:36:15,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:15,084 INFO L514 BasicCegarLoop]: trace histogram [19, 16, 14, 11, 11, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1] [2021-11-13 01:36:15,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:15,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:15,300 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:15,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:15,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1987983501, now seen corresponding path program 4 times [2021-11-13 01:36:15,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:15,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756759027] [2021-11-13 01:36:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:15,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:15,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 183 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2021-11-13 01:36:15,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:15,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756759027] [2021-11-13 01:36:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756759027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:15,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890382388] [2021-11-13 01:36:15,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 01:36:15,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:15,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:15,550 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:15,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 01:36:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:15,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 01:36:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:16,173 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2021-11-13 01:36:16,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 144 proven. 122 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-11-13 01:36:17,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890382388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:17,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666157090] [2021-11-13 01:36:17,626 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:17,626 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:17,627 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:17,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:17,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2021-11-13 01:36:17,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077880188] [2021-11-13 01:36:17,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:17,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 01:36:17,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:17,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 01:36:17,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2021-11-13 01:36:17,632 INFO L87 Difference]: Start difference. First operand 159 states and 174 transitions. Second operand has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2021-11-13 01:36:17,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:17,756 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2021-11-13 01:36:17,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 01:36:17,757 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 165 [2021-11-13 01:36:17,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:17,759 INFO L225 Difference]: With dead ends: 160 [2021-11-13 01:36:17,759 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 01:36:17,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 01:36:17,761 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 67.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.19ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 82.37ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:17,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 164 Invalid, 128 Unknown, 0 Unchecked, 2.19ms Time], IncrementalHoareTripleChecker [19 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 82.37ms Time] [2021-11-13 01:36:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 01:36:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-13 01:36:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 01:36:17,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 170 transitions. [2021-11-13 01:36:17,771 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 170 transitions. Word has length 165 [2021-11-13 01:36:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:17,772 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 170 transitions. [2021-11-13 01:36:17,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2021-11-13 01:36:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 170 transitions. [2021-11-13 01:36:17,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2021-11-13 01:36:17,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:17,780 INFO L514 BasicCegarLoop]: trace histogram [43, 40, 35, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1] [2021-11-13 01:36:17,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:17,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 01:36:17,994 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1645075376, now seen corresponding path program 5 times [2021-11-13 01:36:17,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:17,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488219990] [2021-11-13 01:36:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:17,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 830 proven. 1451 refuted. 0 times theorem prover too weak. 3684 trivial. 0 not checked. [2021-11-13 01:36:18,653 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:18,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488219990] [2021-11-13 01:36:18,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488219990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:18,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086842156] [2021-11-13 01:36:18,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 01:36:18,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:18,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:18,655 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:18,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 01:36:18,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-11-13 01:36:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:18,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-13 01:36:18,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:20,105 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4052 trivial. 0 not checked. [2021-11-13 01:36:20,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:36:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5965 backedges. 1149 proven. 996 refuted. 0 times theorem prover too weak. 3820 trivial. 0 not checked. [2021-11-13 01:36:26,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086842156] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:36:26,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1587854808] [2021-11-13 01:36:26,624 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:36:26,624 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:36:26,624 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:36:26,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:36:26,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2021-11-13 01:36:26,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531495762] [2021-11-13 01:36:26,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:36:26,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 01:36:26,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:36:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 01:36:26,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 01:36:26,630 INFO L87 Difference]: Start difference. First operand 159 states and 170 transitions. Second operand has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-13 01:36:26,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:36:26,812 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2021-11-13 01:36:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 01:36:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) Word has length 408 [2021-11-13 01:36:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:36:26,816 INFO L225 Difference]: With dead ends: 160 [2021-11-13 01:36:26,816 INFO L226 Difference]: Without dead ends: 159 [2021-11-13 01:36:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 851 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 01:36:26,820 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 45 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.75ms IncrementalHoareTripleChecker+Time [2021-11-13 01:36:26,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 184 Invalid, 167 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [20 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 127.75ms Time] [2021-11-13 01:36:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-13 01:36:26,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-11-13 01:36:26,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-13 01:36:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 168 transitions. [2021-11-13 01:36:26,834 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 168 transitions. Word has length 408 [2021-11-13 01:36:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:36:26,835 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 168 transitions. [2021-11-13 01:36:26,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2021-11-13 01:36:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 168 transitions. [2021-11-13 01:36:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1064 [2021-11-13 01:36:26,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:36:26,905 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1] [2021-11-13 01:36:26,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:36:27,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:27,128 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-11-13 01:36:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:36:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1750529970, now seen corresponding path program 6 times [2021-11-13 01:36:27,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:36:27,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722925625] [2021-11-13 01:36:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:36:27,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:36:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:36:29,044 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6794 proven. 10214 refuted. 0 times theorem prover too weak. 24405 trivial. 0 not checked. [2021-11-13 01:36:29,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:36:29,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722925625] [2021-11-13 01:36:29,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722925625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:36:29,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179635726] [2021-11-13 01:36:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 01:36:29,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:36:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:36:29,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:36:29,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 01:36:29,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 01:36:29,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 01:36:29,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1997 conjuncts, 217 conjunts are in the unsatisfiable core [2021-11-13 01:36:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:36:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2021-11-13 01:36:32,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:37:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 41413 backedges. 7863 proven. 7339 refuted. 0 times theorem prover too weak. 26211 trivial. 0 not checked. [2021-11-13 01:37:04,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179635726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 01:37:04,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [290521978] [2021-11-13 01:37:04,677 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-13 01:37:04,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-13 01:37:04,678 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 01:37:04,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 01:37:04,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 41] total 59 [2021-11-13 01:37:04,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651840878] [2021-11-13 01:37:04,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 01:37:04,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 01:37:04,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:37:04,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 01:37:04,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=2770, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 01:37:04,686 INFO L87 Difference]: Start difference. First operand 159 states and 168 transitions. Second operand has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2021-11-13 01:37:04,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:37:04,850 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2021-11-13 01:37:04,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 01:37:04,852 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) Word has length 1063 [2021-11-13 01:37:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:37:04,858 INFO L225 Difference]: With dead ends: 159 [2021-11-13 01:37:04,858 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 01:37:04,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2342 GetRequests, 2283 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=810, Invalid=2850, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 01:37:04,861 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 126.52ms IncrementalHoareTripleChecker+Time [2021-11-13 01:37:04,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 157 Invalid, 169 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [36 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 126.52ms Time] [2021-11-13 01:37:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 01:37:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 01:37:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 01:37:04,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 01:37:04,863 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1063 [2021-11-13 01:37:04,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:37:04,864 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 01:37:04,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2021-11-13 01:37:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 01:37:04,865 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 01:37:04,870 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2021-11-13 01:37:04,871 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2021-11-13 01:37:04,872 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2021-11-13 01:37:04,872 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2021-11-13 01:37:04,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2021-11-13 01:37:04,873 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2021-11-13 01:37:04,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:37:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 01:37:05,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-13 01:37:05,793 INFO L858 garLoopResultBuilder]: For program point fibonacciErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,793 INFO L858 garLoopResultBuilder]: For program point fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,793 INFO L858 garLoopResultBuilder]: For program point fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,793 INFO L858 garLoopResultBuilder]: For program point L19(lines 19 23) no Hoare annotation was computed. [2021-11-13 01:37:05,794 INFO L858 garLoopResultBuilder]: For program point fibonacciEXIT(lines 16 24) no Hoare annotation was computed. [2021-11-13 01:37:05,794 INFO L858 garLoopResultBuilder]: For program point L17(lines 17 23) no Hoare annotation was computed. [2021-11-13 01:37:05,794 INFO L858 garLoopResultBuilder]: For program point fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,794 INFO L858 garLoopResultBuilder]: For program point fibonacciFINAL(lines 16 24) no Hoare annotation was computed. [2021-11-13 01:37:05,794 INFO L858 garLoopResultBuilder]: For program point fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,795 INFO L858 garLoopResultBuilder]: For program point fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,795 INFO L861 garLoopResultBuilder]: At program point fibonacciENTRY(lines 16 24) the Hoare annotation is: true [2021-11-13 01:37:05,796 INFO L858 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,796 INFO L858 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,796 INFO L854 garLoopResultBuilder]: At program point L22-2(line 22) the Hoare annotation is: (and (or (<= fibonacci_~n |fibonacci_#in~n|) (not (<= |fibonacci_#in~n| 8))) (or (not (<= |fibonacci_#in~n| 9)) (and (<= fibonacci_~n 9) (<= |fibonacci_#in~n| fibonacci_~n))) (not (<= |fibonacci_#in~n| 1))) [2021-11-13 01:37:05,797 INFO L858 garLoopResultBuilder]: For program point L22-3(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,797 INFO L858 garLoopResultBuilder]: For program point L22-4(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,797 INFO L858 garLoopResultBuilder]: For program point L22-5(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,798 INFO L854 garLoopResultBuilder]: At program point L22-6(line 22) the Hoare annotation is: (let ((.cse0 (<= fibonacci_~n |fibonacci_#in~n|)) (.cse1 (<= 2 |fibonacci_#t~ret7|)) (.cse2 (<= |fibonacci_#in~n| fibonacci_~n))) (and (or (not (<= 7 |fibonacci_#in~n|)) (and (<= |fibonacci_#t~ret7| 8) .cse0 .cse1 .cse2) (not (<= |fibonacci_#in~n| 7))) (or (not (<= |fibonacci_#in~n| 6)) (not (<= 6 |fibonacci_#in~n|)) (and (<= |fibonacci_#t~ret7| 5) (<= fibonacci_~n 6) .cse1 .cse2)) (or (and .cse0 (<= |fibonacci_#t~ret7| 2) .cse1 .cse2) (not (< 3 |fibonacci_#in~n|)) (not (<= |fibonacci_#in~n| 4))) (or (and (<= |fibonacci_#t~ret7| 21) (<= fibonacci_~n 9) .cse1 .cse2) (not (<= |fibonacci_#in~n| 9)) (not (<= 9 |fibonacci_#in~n|))) (or (and (<= |fibonacci_#t~ret7| 3) .cse0 .cse1 .cse2) (not (<= |fibonacci_#in~n| 5)) (not (<= 5 |fibonacci_#in~n|))) (or (and .cse0 (= |fibonacci_#t~ret7| 1) .cse2) (not (<= |fibonacci_#in~n| 3))) (or (not (<= |fibonacci_#in~n| 8)) (not (<= 8 |fibonacci_#in~n|)) (and .cse0 (<= |fibonacci_#t~ret7| 13) .cse1 .cse2)) (not (<= |fibonacci_#in~n| 1)))) [2021-11-13 01:37:05,798 INFO L858 garLoopResultBuilder]: For program point L22-7(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,798 INFO L858 garLoopResultBuilder]: For program point L22-8(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,798 INFO L858 garLoopResultBuilder]: For program point L22-9(line 22) no Hoare annotation was computed. [2021-11-13 01:37:05,799 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-13 01:37:05,799 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-13 01:37:05,800 INFO L854 garLoopResultBuilder]: At program point L29(line 29) the Hoare annotation is: (and (<= 9 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 9)) [2021-11-13 01:37:05,800 INFO L854 garLoopResultBuilder]: At program point L29-1(line 29) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 9) [2021-11-13 01:37:05,808 INFO L732 BasicCegarLoop]: Path program histogram: [6, 2, 1, 1, 1, 1, 1, 1] [2021-11-13 01:37:05,811 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 01:37:05,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 01:37:05 BoogieIcfgContainer [2021-11-13 01:37:05,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 01:37:05,837 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 01:37:05,837 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 01:37:05,837 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 01:37:05,838 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:36:01" (3/4) ... [2021-11-13 01:37:05,842 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 01:37:05,847 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure fibonacci [2021-11-13 01:37:05,854 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-13 01:37:05,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-11-13 01:37:05,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-13 01:37:05,855 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 01:37:05,899 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/witness.graphml [2021-11-13 01:37:05,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 01:37:05,900 INFO L158 Benchmark]: Toolchain (without parser) took 64789.47ms. Allocated memory was 92.3MB in the beginning and 352.3MB in the end (delta: 260.0MB). Free memory was 59.2MB in the beginning and 241.5MB in the end (delta: -182.2MB). Peak memory consumption was 76.8MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,900 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 46.4MB in the beginning and 46.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:37:05,901 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.88ms. Allocated memory is still 92.3MB. Free memory was 59.1MB in the beginning and 68.9MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,901 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.13ms. Allocated memory is still 92.3MB. Free memory was 68.9MB in the beginning and 67.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:37:05,902 INFO L158 Benchmark]: Boogie Preprocessor took 23.22ms. Allocated memory is still 92.3MB. Free memory was 67.6MB in the beginning and 66.6MB in the end (delta: 940.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,902 INFO L158 Benchmark]: RCFGBuilder took 433.54ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 56.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,903 INFO L158 Benchmark]: TraceAbstraction took 63940.60ms. Allocated memory was 92.3MB in the beginning and 352.3MB in the end (delta: 260.0MB). Free memory was 55.9MB in the beginning and 243.6MB in the end (delta: -187.6MB). Peak memory consumption was 73.5MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,903 INFO L158 Benchmark]: Witness Printer took 62.22ms. Allocated memory is still 352.3MB. Free memory was 243.6MB in the beginning and 241.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 01:37:05,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 92.3MB. Free memory was 46.4MB in the beginning and 46.3MB in the end (delta: 69.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 283.88ms. Allocated memory is still 92.3MB. Free memory was 59.1MB in the beginning and 68.9MB in the end (delta: -9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.13ms. Allocated memory is still 92.3MB. Free memory was 68.9MB in the beginning and 67.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 23.22ms. Allocated memory is still 92.3MB. Free memory was 67.6MB in the beginning and 66.6MB in the end (delta: 940.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 433.54ms. Allocated memory is still 92.3MB. Free memory was 66.6MB in the beginning and 56.5MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 63940.60ms. Allocated memory was 92.3MB in the beginning and 352.3MB in the end (delta: 260.0MB). Free memory was 55.9MB in the beginning and 243.6MB in the end (delta: -187.6MB). Peak memory consumption was 73.5MB. Max. memory is 16.1GB. * Witness Printer took 62.22ms. Allocated memory is still 352.3MB. Free memory was 243.6MB in the beginning and 241.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 63.8s, OverallIterations: 14, TraceHistogramMax: 109, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.1s, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1586 SdHoareTripleChecker+Valid, 2781.74ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1535 mSDsluCounter, 2351 SdHoareTripleChecker+Invalid, 2185.71ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2048 mSDsCounter, 563 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3536 IncrementalHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 563 mSolverCounterUnsat, 392 mSDtfsCounter, 3536 mSolverCounterSat, 64.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4736 GetRequests, 4390 SyntacticMatches, 3 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=305occurred in iteration=8, InterpolantAutomatonStates: 210, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 121 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 320 PreInvPairs, 338 NumberOfFragments, 188 HoareAnnotationTreeSize, 320 FomulaSimplifications, 450 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 889 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 53.1s InterpolantComputationTime, 4361 NumberOfCodeBlocks, 4268 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 6451 ConstructedInterpolants, 0 QuantifiedInterpolants, 15428 SizeOfPredicates, 20 NumberOfNonLiveVariables, 4058 ConjunctsInSsa, 402 ConjunctsInUnsatCore, 34 InterpolantComputations, 6 PerfectInterpolantSequences, 119718/150020 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: x <= 9 RESULT: Ultimate proved your program to be correct! [2021-11-13 01:37:05,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c2f529fd-12b7-43f9-8c49-773ec9196ff6/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE