./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur --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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:58:59,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:58:59,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:58:59,027 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:58:59,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:58:59,028 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:58:59,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:58:59,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:58:59,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:58:59,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:58:59,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:58:59,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:58:59,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:58:59,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:58:59,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:58:59,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:58:59,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:58:59,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:58:59,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:58:59,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:58:59,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:58:59,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:58:59,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:58:59,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:58:59,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:58:59,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:58:59,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:58:59,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:58:59,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:58:59,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:58:59,061 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:58:59,062 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:58:59,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:58:59,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:58:59,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:58:59,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:58:59,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:58:59,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:58:59,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:58:59,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:58:59,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:58:59,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-26 00:58:59,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:58:59,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:58:59,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:58:59,103 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:58:59,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:58:59,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:58:59,104 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:58:59,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:58:59,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:58:59,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:58:59,105 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:58:59,105 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:58:59,106 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:58:59,106 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:58:59,106 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:58:59,106 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:58:59,119 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:58:59,120 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:58:59,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:58:59,121 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:58:59,121 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:58:59,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:58:59,121 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:58:59,121 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:58:59,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:58:59,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:58:59,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:58:59,122 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:58:59,124 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:58:59,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:58:59,124 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:58:59,125 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:58:59,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:58:59,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:58:59,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:58:59,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:58:59,127 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:58:59,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:58:59,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:58:59,128 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:58:59,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:58:59,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:58:59,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:58:59,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2022-11-26 00:58:59,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:58:59,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:58:59,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:58:59,573 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:58:59,573 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:58:59,575 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2022-11-26 00:59:02,976 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:59:03,249 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:59:03,250 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2022-11-26 00:59:03,260 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/data/e0d65c848/9d993f52b6fe42f59e69841a814d1688/FLAG1a054fac4 [2022-11-26 00:59:03,288 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/data/e0d65c848/9d993f52b6fe42f59e69841a814d1688 [2022-11-26 00:59:03,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:59:03,297 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:59:03,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:59:03,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:59:03,310 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:59:03,312 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b17c40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03, skipping insertion in model container [2022-11-26 00:59:03,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:59:03,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:59:03,640 WARN L237 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_f9792381-1055-4992-aa30-4dfcc5834849/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2022-11-26 00:59:03,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:59:03,653 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:59:03,672 WARN L237 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_f9792381-1055-4992-aa30-4dfcc5834849/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2022-11-26 00:59:03,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:59:03,690 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:59:03,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03 WrapperNode [2022-11-26 00:59:03,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:59:03,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:59:03,693 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:59:03,693 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:59:03,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,727 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-26 00:59:03,728 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:59:03,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:59:03,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:59:03,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:59:03,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,744 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,747 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:59:03,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:59:03,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:59:03,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:59:03,763 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (1/1) ... [2022-11-26 00:59:03,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:59:03,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:03,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:59:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:59:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:59:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:59:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-26 00:59:03,852 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-26 00:59:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-26 00:59:03,853 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-26 00:59:03,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:59:03,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:59:03,935 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:59:03,939 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:59:04,210 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:59:04,239 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:59:04,240 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:59:04,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:59:04 BoogieIcfgContainer [2022-11-26 00:59:04,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:59:04,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:59:04,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:59:04,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:59:04,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:59:03" (1/3) ... [2022-11-26 00:59:04,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab9c043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:59:04, skipping insertion in model container [2022-11-26 00:59:04,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:59:03" (2/3) ... [2022-11-26 00:59:04,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab9c043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:59:04, skipping insertion in model container [2022-11-26 00:59:04,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:59:04" (3/3) ... [2022-11-26 00:59:04,260 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2022-11-26 00:59:04,299 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:59:04,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-26 00:59:04,389 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:59:04,400 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1322763a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:59:04,401 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-26 00:59:04,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-26 00:59:04,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:59:04,416 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:04,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:59:04,417 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1023451622, now seen corresponding path program 1 times [2022-11-26 00:59:04,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:04,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670225958] [2022-11-26 00:59:04,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:04,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:04,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:04,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670225958] [2022-11-26 00:59:04,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670225958] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:04,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:04,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:59:04,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384045020] [2022-11-26 00:59:04,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:04,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:59:04,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:04,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:59:04,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:59:04,785 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.5) 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) [2022-11-26 00:59:04,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:04,893 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-26 00:59:04,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:59:04,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2022-11-26 00:59:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:04,907 INFO L225 Difference]: With dead ends: 48 [2022-11-26 00:59:04,907 INFO L226 Difference]: Without dead ends: 44 [2022-11-26 00:59:04,912 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:04,917 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:04,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:04,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-26 00:59:04,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-26 00:59:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-26 00:59:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-26 00:59:04,978 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2022-11-26 00:59:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:04,979 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-26 00:59:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2022-11-26 00:59:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-26 00:59:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:59:04,982 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:04,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:04,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:59:04,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:04,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:04,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1662229125, now seen corresponding path program 1 times [2022-11-26 00:59:04,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:04,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233584941] [2022-11-26 00:59:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:04,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:05,108 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:05,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233584941] [2022-11-26 00:59:05,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233584941] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:05,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:05,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:59:05,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872076588] [2022-11-26 00:59:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:05,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:05,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:05,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:05,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:05,113 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 3 states have (on average 2.0) 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) [2022-11-26 00:59:05,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:05,197 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-11-26 00:59:05,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:59:05,198 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) 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 [2022-11-26 00:59:05,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:05,199 INFO L225 Difference]: With dead ends: 63 [2022-11-26 00:59:05,200 INFO L226 Difference]: Without dead ends: 59 [2022-11-26 00:59:05,200 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:05,202 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:05,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:05,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-26 00:59:05,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-26 00:59:05,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:59:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-26 00:59:05,213 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-11-26 00:59:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:05,214 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-26 00:59:05,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) 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) [2022-11-26 00:59:05,215 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-26 00:59:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-26 00:59:05,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:05,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:59:05,216 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:05,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -942893292, now seen corresponding path program 1 times [2022-11-26 00:59:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:05,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029307493] [2022-11-26 00:59:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:05,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:05,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:05,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029307493] [2022-11-26 00:59:05,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029307493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:05,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:05,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:59:05,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016934162] [2022-11-26 00:59:05,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:05,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:59:05,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:59:05,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:59:05,263 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:05,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:05,295 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-11-26 00:59:05,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:59:05,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-26 00:59:05,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:05,298 INFO L225 Difference]: With dead ends: 57 [2022-11-26 00:59:05,298 INFO L226 Difference]: Without dead ends: 55 [2022-11-26 00:59:05,299 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:05,305 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:05,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-26 00:59:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-26 00:59:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:59:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-26 00:59:05,327 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2022-11-26 00:59:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:05,331 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-26 00:59:05,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:05,331 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-26 00:59:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-26 00:59:05,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:05,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:05,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:59:05,333 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash 835079079, now seen corresponding path program 1 times [2022-11-26 00:59:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:05,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918539416] [2022-11-26 00:59:05,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:05,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:05,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918539416] [2022-11-26 00:59:05,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918539416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:05,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:05,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-26 00:59:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44313457] [2022-11-26 00:59:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:59:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:59:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:59:05,543 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:05,726 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-26 00:59:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:59:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-26 00:59:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:05,728 INFO L225 Difference]: With dead ends: 53 [2022-11-26 00:59:05,728 INFO L226 Difference]: Without dead ends: 49 [2022-11-26 00:59:05,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:59:05,730 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:05,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:05,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-26 00:59:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-26 00:59:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-26 00:59:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-26 00:59:05,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2022-11-26 00:59:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:05,746 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-26 00:59:05,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:59:05,747 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-26 00:59:05,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-26 00:59:05,748 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:05,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:05,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:59:05,748 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:05,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:05,749 INFO L85 PathProgramCache]: Analyzing trace with hash 21328462, now seen corresponding path program 1 times [2022-11-26 00:59:05,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:05,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456788410] [2022-11-26 00:59:05,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:05,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:05,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:59:05,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:05,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456788410] [2022-11-26 00:59:05,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456788410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:05,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:05,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:05,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603630889] [2022-11-26 00:59:05,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:05,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:05,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:05,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:05,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:05,904 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-26 00:59:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:05,961 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-11-26 00:59:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 22 [2022-11-26 00:59:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:05,964 INFO L225 Difference]: With dead ends: 75 [2022-11-26 00:59:05,964 INFO L226 Difference]: Without dead ends: 70 [2022-11-26 00:59:05,964 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:05,966 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:05,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-26 00:59:05,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-11-26 00:59:05,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2022-11-26 00:59:05,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-11-26 00:59:05,996 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2022-11-26 00:59:05,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:05,997 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-11-26 00:59:05,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-26 00:59:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-11-26 00:59:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-26 00:59:05,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:06,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:59:06,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:06,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:06,001 INFO L85 PathProgramCache]: Analyzing trace with hash 672130067, now seen corresponding path program 1 times [2022-11-26 00:59:06,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:06,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310593357] [2022-11-26 00:59:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:06,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:06,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-26 00:59:06,149 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:06,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310593357] [2022-11-26 00:59:06,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310593357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:06,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563316658] [2022-11-26 00:59:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:06,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:06,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:06,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:59:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:06,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:59:06,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:06,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:06,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563316658] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:06,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:06,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-26 00:59:06,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783639023] [2022-11-26 00:59:06,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:06,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-26 00:59:06,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:06,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-26 00:59:06,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:59:06,464 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:06,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:06,660 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-11-26 00:59:06,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-26 00:59:06,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-11-26 00:59:06,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:06,662 INFO L225 Difference]: With dead ends: 110 [2022-11-26 00:59:06,662 INFO L226 Difference]: Without dead ends: 60 [2022-11-26 00:59:06,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-26 00:59:06,665 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:06,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 110 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-26 00:59:06,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-26 00:59:06,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-26 00:59:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-26 00:59:06,676 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2022-11-26 00:59:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:06,677 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-26 00:59:06,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-26 00:59:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-26 00:59:06,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:06,679 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:06,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:59:06,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:06,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1599491552, now seen corresponding path program 1 times [2022-11-26 00:59:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:06,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621704484] [2022-11-26 00:59:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:06,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:59:07,001 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:07,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621704484] [2022-11-26 00:59:07,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621704484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:07,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:07,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616606645] [2022-11-26 00:59:07,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:07,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:07,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:07,005 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-26 00:59:07,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:07,059 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-26 00:59:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:07,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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 24 [2022-11-26 00:59:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:07,062 INFO L225 Difference]: With dead ends: 84 [2022-11-26 00:59:07,062 INFO L226 Difference]: Without dead ends: 79 [2022-11-26 00:59:07,063 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:07,064 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:07,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:07,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-26 00:59:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-11-26 00:59:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2022-11-26 00:59:07,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-11-26 00:59:07,083 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-11-26 00:59:07,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:07,084 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-11-26 00:59:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 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) [2022-11-26 00:59:07,085 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-11-26 00:59:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:59:07,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:07,090 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:07,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:59:07,090 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:07,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:07,091 INFO L85 PathProgramCache]: Analyzing trace with hash -141800136, now seen corresponding path program 1 times [2022-11-26 00:59:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:07,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658632852] [2022-11-26 00:59:07,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:07,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:07,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-26 00:59:07,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:07,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658632852] [2022-11-26 00:59:07,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658632852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:07,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:07,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:07,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037961525] [2022-11-26 00:59:07,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:07,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:07,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:07,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:07,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:07,277 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:07,330 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-26 00:59:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-26 00:59:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:07,333 INFO L225 Difference]: With dead ends: 84 [2022-11-26 00:59:07,333 INFO L226 Difference]: Without dead ends: 82 [2022-11-26 00:59:07,333 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:07,334 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:07,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:07,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-26 00:59:07,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-26 00:59:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2022-11-26 00:59:07,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-26 00:59:07,348 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2022-11-26 00:59:07,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:07,348 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-26 00:59:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:07,349 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-26 00:59:07,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:59:07,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:07,351 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:07,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-26 00:59:07,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:07,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -88974329, now seen corresponding path program 1 times [2022-11-26 00:59:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:07,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363261329] [2022-11-26 00:59:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:59:07,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363261329] [2022-11-26 00:59:07,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363261329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:07,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610587011] [2022-11-26 00:59:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:07,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:07,459 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:07,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:59:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:07,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:07,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:07,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610587011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:07,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432669003] [2022-11-26 00:59:07,871 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:59:07,871 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:07,876 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:07,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:07,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-26 00:59:07,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957315679] [2022-11-26 00:59:07,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:07,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:59:07,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:59:07,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:59:07,887 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:59:08,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:08,640 INFO L93 Difference]: Finished difference Result 205 states and 274 transitions. [2022-11-26 00:59:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:59:08,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-11-26 00:59:08,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:08,646 INFO L225 Difference]: With dead ends: 205 [2022-11-26 00:59:08,646 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:59:08,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-26 00:59:08,658 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 118 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:08,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 505 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:59:08,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:59:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2022-11-26 00:59:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 17 states have call predecessors, (34), 15 states have call successors, (34) [2022-11-26 00:59:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-26 00:59:08,705 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 29 [2022-11-26 00:59:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:08,705 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-26 00:59:08,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:59:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-26 00:59:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:59:08,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:08,718 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:08,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:08,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:59:08,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1080973755, now seen corresponding path program 2 times [2022-11-26 00:59:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:08,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345401063] [2022-11-26 00:59:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:08,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:59:09,064 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345401063] [2022-11-26 00:59:09,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345401063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617499122] [2022-11-26 00:59:09,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:09,067 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:09,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:59:09,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:59:09,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:59:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:59:09,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:09,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617499122] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:09,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:09,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-26 00:59:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002242595] [2022-11-26 00:59:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:09,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:09,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:09,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:59:09,208 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:09,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:09,271 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2022-11-26 00:59:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-26 00:59:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:09,276 INFO L225 Difference]: With dead ends: 130 [2022-11-26 00:59:09,277 INFO L226 Difference]: Without dead ends: 129 [2022-11-26 00:59:09,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:59:09,278 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:09,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-26 00:59:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-11-26 00:59:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 19 states have call predecessors, (34), 15 states have call successors, (34) [2022-11-26 00:59:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-11-26 00:59:09,316 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 41 [2022-11-26 00:59:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:09,316 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-11-26 00:59:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:09,317 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-11-26 00:59:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:59:09,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:09,319 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:09,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:09,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:59:09,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:09,527 INFO L85 PathProgramCache]: Analyzing trace with hash -849551892, now seen corresponding path program 1 times [2022-11-26 00:59:09,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:09,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509257878] [2022-11-26 00:59:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:09,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:59:09,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509257878] [2022-11-26 00:59:09,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509257878] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495291728] [2022-11-26 00:59:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:09,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:09,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:09,673 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:09,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:59:09,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:59:09,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:10,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:10,377 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:10,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495291728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:10,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020945153] [2022-11-26 00:59:10,380 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-26 00:59:10,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:10,381 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:10,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:10,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 23 [2022-11-26 00:59:10,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484787890] [2022-11-26 00:59:10,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:10,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:59:10,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:10,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:59:10,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:59:10,386 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:59:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:11,337 INFO L93 Difference]: Finished difference Result 322 states and 422 transitions. [2022-11-26 00:59:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:59:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 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 [2022-11-26 00:59:11,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:11,340 INFO L225 Difference]: With dead ends: 322 [2022-11-26 00:59:11,340 INFO L226 Difference]: Without dead ends: 212 [2022-11-26 00:59:11,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:59:11,343 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 181 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:11,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 713 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:59:11,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-26 00:59:11,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2022-11-26 00:59:11,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 148 states have (on average 1.1554054054054055) internal successors, (171), 150 states have internal predecessors, (171), 25 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (48), 29 states have call predecessors, (48), 24 states have call successors, (48) [2022-11-26 00:59:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2022-11-26 00:59:11,366 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 42 [2022-11-26 00:59:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:11,367 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2022-11-26 00:59:11,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:59:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2022-11-26 00:59:11,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:59:11,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:11,369 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:11,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:11,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:11,576 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:11,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1587514251, now seen corresponding path program 1 times [2022-11-26 00:59:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:11,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761177698] [2022-11-26 00:59:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:11,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:59:11,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:11,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761177698] [2022-11-26 00:59:11,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761177698] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:11,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6565971] [2022-11-26 00:59:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:11,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:11,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:11,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:11,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:59:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:11,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:59:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:59:12,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:12,544 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:59:12,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6565971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:12,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052410325] [2022-11-26 00:59:12,547 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-26 00:59:12,548 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:12,548 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:12,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:12,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 19, 19] total 24 [2022-11-26 00:59:12,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753300039] [2022-11-26 00:59:12,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:12,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:59:12,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:12,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:59:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:59:12,553 INFO L87 Difference]: Start difference. First operand 190 states and 244 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:59:13,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:13,531 INFO L93 Difference]: Finished difference Result 407 states and 524 transitions. [2022-11-26 00:59:13,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-26 00:59:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 59 [2022-11-26 00:59:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:13,535 INFO L225 Difference]: With dead ends: 407 [2022-11-26 00:59:13,535 INFO L226 Difference]: Without dead ends: 237 [2022-11-26 00:59:13,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 00:59:13,538 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 206 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:13,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 804 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:59:13,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-26 00:59:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 212. [2022-11-26 00:59:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 166 states have (on average 1.1506024096385543) internal successors, (191), 167 states have internal predecessors, (191), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (54), 33 states have call predecessors, (54), 27 states have call successors, (54) [2022-11-26 00:59:13,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-11-26 00:59:13,562 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 59 [2022-11-26 00:59:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:13,563 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-11-26 00:59:13,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-26 00:59:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-11-26 00:59:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-26 00:59:13,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:13,565 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:13,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:13,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:59:13,773 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:13,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:13,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1792758973, now seen corresponding path program 2 times [2022-11-26 00:59:13,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:13,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053268835] [2022-11-26 00:59:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:13,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:59:13,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:13,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053268835] [2022-11-26 00:59:13,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053268835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:13,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14759620] [2022-11-26 00:59:13,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:13,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:13,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:13,930 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:13,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:59:13,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:59:14,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:14,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:59:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:59:14,065 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:14,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14759620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:14,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:14,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-26 00:59:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032172820] [2022-11-26 00:59:14,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:14,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:14,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:14,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:14,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:59:14,071 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:14,119 INFO L93 Difference]: Finished difference Result 226 states and 293 transitions. [2022-11-26 00:59:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-11-26 00:59:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:14,126 INFO L225 Difference]: With dead ends: 226 [2022-11-26 00:59:14,126 INFO L226 Difference]: Without dead ends: 225 [2022-11-26 00:59:14,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:59:14,128 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:14,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-26 00:59:14,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2022-11-26 00:59:14,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 171 states have internal predecessors, (199), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (54), 37 states have call predecessors, (54), 27 states have call successors, (54) [2022-11-26 00:59:14,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2022-11-26 00:59:14,160 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 59 [2022-11-26 00:59:14,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:14,162 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2022-11-26 00:59:14,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2022-11-26 00:59:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-26 00:59:14,170 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:14,171 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:14,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-26 00:59:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:59:14,377 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 259046782, now seen corresponding path program 1 times [2022-11-26 00:59:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:14,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174556640] [2022-11-26 00:59:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:59:14,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:14,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174556640] [2022-11-26 00:59:14,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174556640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:14,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463653478] [2022-11-26 00:59:14,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:14,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:14,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:14,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:14,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:59:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:14,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:59:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:14,653 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-26 00:59:14,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463653478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:14,654 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:14,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-26 00:59:14,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208559407] [2022-11-26 00:59:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:14,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:59:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:14,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:59:14,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:59:14,656 INFO L87 Difference]: Start difference. First operand 220 states and 281 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:14,716 INFO L93 Difference]: Finished difference Result 238 states and 302 transitions. [2022-11-26 00:59:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-26 00:59:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-11-26 00:59:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:14,719 INFO L225 Difference]: With dead ends: 238 [2022-11-26 00:59:14,719 INFO L226 Difference]: Without dead ends: 237 [2022-11-26 00:59:14,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:59:14,720 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:14,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-26 00:59:14,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 216. [2022-11-26 00:59:14,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 168 states have internal predecessors, (196), 27 states have call successors, (27), 11 states have call predecessors, (27), 14 states have return successors, (51), 36 states have call predecessors, (51), 26 states have call successors, (51) [2022-11-26 00:59:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2022-11-26 00:59:14,741 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 60 [2022-11-26 00:59:14,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:14,742 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2022-11-26 00:59:14,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:14,742 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2022-11-26 00:59:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:59:14,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:14,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:14,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:14,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:14,951 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1139210959, now seen corresponding path program 1 times [2022-11-26 00:59:14,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:14,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560517705] [2022-11-26 00:59:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:14,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:14,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-26 00:59:15,040 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:15,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560517705] [2022-11-26 00:59:15,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560517705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:15,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:15,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:15,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965357278] [2022-11-26 00:59:15,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:15,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:15,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:15,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:15,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:15,044 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:15,096 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2022-11-26 00:59:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:15,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-11-26 00:59:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:15,099 INFO L225 Difference]: With dead ends: 228 [2022-11-26 00:59:15,099 INFO L226 Difference]: Without dead ends: 227 [2022-11-26 00:59:15,101 INFO L412 NwaCegarLoop]: 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 [2022-11-26 00:59:15,102 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:15,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 163 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-26 00:59:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2022-11-26 00:59:15,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 167 states have (on average 1.1497005988023952) internal successors, (192), 163 states have internal predecessors, (192), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (43), 35 states have call predecessors, (43), 25 states have call successors, (43) [2022-11-26 00:59:15,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2022-11-26 00:59:15,125 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 67 [2022-11-26 00:59:15,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:15,125 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2022-11-26 00:59:15,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:59:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2022-11-26 00:59:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:59:15,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:15,128 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:15,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-26 00:59:15,129 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:15,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:15,130 INFO L85 PathProgramCache]: Analyzing trace with hash -657014903, now seen corresponding path program 1 times [2022-11-26 00:59:15,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:15,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375414988] [2022-11-26 00:59:15,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-26 00:59:15,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:15,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375414988] [2022-11-26 00:59:15,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375414988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:15,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832228053] [2022-11-26 00:59:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:15,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:15,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:15,229 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:15,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:59:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:15,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:59:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 58 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:59:15,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 58 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:59:16,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832228053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:16,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1863959850] [2022-11-26 00:59:16,041 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-26 00:59:16,041 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:16,042 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:16,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:16,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 19, 19] total 23 [2022-11-26 00:59:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63093381] [2022-11-26 00:59:16,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:16,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 00:59:16,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:16,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 00:59:16,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:59:16,045 INFO L87 Difference]: Start difference. First operand 210 states and 261 transitions. Second operand has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:59:17,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:17,031 INFO L93 Difference]: Finished difference Result 584 states and 774 transitions. [2022-11-26 00:59:17,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:59:17,032 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 78 [2022-11-26 00:59:17,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:17,034 INFO L225 Difference]: With dead ends: 584 [2022-11-26 00:59:17,034 INFO L226 Difference]: Without dead ends: 394 [2022-11-26 00:59:17,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-26 00:59:17,038 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 367 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:17,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 165 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:59:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-26 00:59:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 361. [2022-11-26 00:59:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 289 states have (on average 1.1418685121107266) internal successors, (330), 280 states have internal predecessors, (330), 45 states have call successors, (45), 18 states have call predecessors, (45), 23 states have return successors, (77), 62 states have call predecessors, (77), 44 states have call successors, (77) [2022-11-26 00:59:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 452 transitions. [2022-11-26 00:59:17,071 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 452 transitions. Word has length 78 [2022-11-26 00:59:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:17,071 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 452 transitions. [2022-11-26 00:59:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-26 00:59:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 452 transitions. [2022-11-26 00:59:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-26 00:59:17,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:17,073 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:17,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:17,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:59:17,280 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1962617586, now seen corresponding path program 1 times [2022-11-26 00:59:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:17,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247925953] [2022-11-26 00:59:17,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:17,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-26 00:59:17,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:17,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247925953] [2022-11-26 00:59:17,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247925953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:17,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:17,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:17,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888868978] [2022-11-26 00:59:17,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:17,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:17,364 INFO L87 Difference]: Start difference. First operand 361 states and 452 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:59:17,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:17,435 INFO L93 Difference]: Finished difference Result 389 states and 491 transitions. [2022-11-26 00:59:17,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:17,435 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 73 [2022-11-26 00:59:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:17,438 INFO L225 Difference]: With dead ends: 389 [2022-11-26 00:59:17,438 INFO L226 Difference]: Without dead ends: 388 [2022-11-26 00:59:17,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:17,440 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:17,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:17,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-26 00:59:17,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 374. [2022-11-26 00:59:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 300 states have (on average 1.1366666666666667) internal successors, (341), 290 states have internal predecessors, (341), 45 states have call successors, (45), 18 states have call predecessors, (45), 25 states have return successors, (86), 65 states have call predecessors, (86), 44 states have call successors, (86) [2022-11-26 00:59:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 472 transitions. [2022-11-26 00:59:17,469 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 472 transitions. Word has length 73 [2022-11-26 00:59:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:17,470 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 472 transitions. [2022-11-26 00:59:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:59:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 472 transitions. [2022-11-26 00:59:17,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-26 00:59:17,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:17,472 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:17,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-26 00:59:17,472 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:17,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1079341213, now seen corresponding path program 1 times [2022-11-26 00:59:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:17,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620889936] [2022-11-26 00:59:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:17,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-26 00:59:17,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620889936] [2022-11-26 00:59:17,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620889936] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:17,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81643939] [2022-11-26 00:59:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:17,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:17,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:17,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:17,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:59:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:17,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:59:17,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-26 00:59:17,928 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:17,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81643939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:17,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:17,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-26 00:59:17,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716403077] [2022-11-26 00:59:17,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:17,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-26 00:59:17,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:17,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-26 00:59:17,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:59:17,931 INFO L87 Difference]: Start difference. First operand 374 states and 472 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:59:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:18,040 INFO L93 Difference]: Finished difference Result 485 states and 630 transitions. [2022-11-26 00:59:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-26 00:59:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 74 [2022-11-26 00:59:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:18,044 INFO L225 Difference]: With dead ends: 485 [2022-11-26 00:59:18,044 INFO L226 Difference]: Without dead ends: 484 [2022-11-26 00:59:18,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-26 00:59:18,046 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:18,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 192 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:59:18,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-26 00:59:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 410. [2022-11-26 00:59:18,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 329 states have (on average 1.1398176291793314) internal successors, (375), 316 states have internal predecessors, (375), 48 states have call successors, (48), 18 states have call predecessors, (48), 29 states have return successors, (111), 75 states have call predecessors, (111), 47 states have call successors, (111) [2022-11-26 00:59:18,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 534 transitions. [2022-11-26 00:59:18,080 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 534 transitions. Word has length 74 [2022-11-26 00:59:18,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:18,080 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 534 transitions. [2022-11-26 00:59:18,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-26 00:59:18,081 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 534 transitions. [2022-11-26 00:59:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-26 00:59:18,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:18,083 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:18,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:18,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:59:18,290 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:18,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:18,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1812662554, now seen corresponding path program 1 times [2022-11-26 00:59:18,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:18,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410355642] [2022-11-26 00:59:18,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:18,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:18,370 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-26 00:59:18,371 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:18,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410355642] [2022-11-26 00:59:18,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410355642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:18,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776506119] [2022-11-26 00:59:18,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:18,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:18,373 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:18,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:59:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:18,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-26 00:59:18,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:59:18,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:59:18,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776506119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:18,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:59:18,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 24 [2022-11-26 00:59:18,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857820946] [2022-11-26 00:59:18,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:18,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:59:18,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:18,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:59:18,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:59:18,797 INFO L87 Difference]: Start difference. First operand 410 states and 534 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:19,506 INFO L93 Difference]: Finished difference Result 793 states and 1068 transitions. [2022-11-26 00:59:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-26 00:59:19,507 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 95 [2022-11-26 00:59:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:19,510 INFO L225 Difference]: With dead ends: 793 [2022-11-26 00:59:19,511 INFO L226 Difference]: Without dead ends: 442 [2022-11-26 00:59:19,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-11-26 00:59:19,515 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 328 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:19,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 219 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:59:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-26 00:59:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2022-11-26 00:59:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.138728323699422) internal successors, (394), 335 states have internal predecessors, (394), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (113), 77 states have call predecessors, (113), 49 states have call successors, (113) [2022-11-26 00:59:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 557 transitions. [2022-11-26 00:59:19,551 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 557 transitions. Word has length 95 [2022-11-26 00:59:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:19,551 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 557 transitions. [2022-11-26 00:59:19,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-26 00:59:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 557 transitions. [2022-11-26 00:59:19,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-26 00:59:19,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:19,556 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:19,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:19,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:19,763 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:19,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1307042925, now seen corresponding path program 1 times [2022-11-26 00:59:19,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:19,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984324765] [2022-11-26 00:59:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:19,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-26 00:59:19,866 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:19,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984324765] [2022-11-26 00:59:19,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984324765] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:59:19,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:59:19,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:59:19,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373919793] [2022-11-26 00:59:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:59:19,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:59:19,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:59:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:19,869 INFO L87 Difference]: Start difference. First operand 433 states and 557 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:59:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:19,920 INFO L93 Difference]: Finished difference Result 447 states and 573 transitions. [2022-11-26 00:59:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:59:19,921 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 78 [2022-11-26 00:59:19,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:19,924 INFO L225 Difference]: With dead ends: 447 [2022-11-26 00:59:19,924 INFO L226 Difference]: Without dead ends: 446 [2022-11-26 00:59:19,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:59:19,925 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:19,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:59:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-26 00:59:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2022-11-26 00:59:19,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.1329479768786128) internal successors, (392), 335 states have internal predecessors, (392), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (113), 77 states have call predecessors, (113), 49 states have call successors, (113) [2022-11-26 00:59:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 555 transitions. [2022-11-26 00:59:19,961 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 555 transitions. Word has length 78 [2022-11-26 00:59:19,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:19,962 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 555 transitions. [2022-11-26 00:59:19,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-26 00:59:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 555 transitions. [2022-11-26 00:59:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-26 00:59:19,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:19,964 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:19,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-26 00:59:19,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:19,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:19,965 INFO L85 PathProgramCache]: Analyzing trace with hash 122703663, now seen corresponding path program 1 times [2022-11-26 00:59:19,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:19,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559124244] [2022-11-26 00:59:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:19,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:59:20,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559124244] [2022-11-26 00:59:20,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559124244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:20,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332678299] [2022-11-26 00:59:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:20,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:20,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:20,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:20,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:59:20,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:20,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:59:20,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:20,523 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 34 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-26 00:59:20,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:59:20,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332678299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:20,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1992936114] [2022-11-26 00:59:20,931 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:20,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:20,932 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:20,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:20,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-26 00:59:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331998685] [2022-11-26 00:59:20,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:59:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:59:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:59:20,936 INFO L87 Difference]: Start difference. First operand 433 states and 555 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:59:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:21,531 INFO L93 Difference]: Finished difference Result 839 states and 1085 transitions. [2022-11-26 00:59:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-26 00:59:21,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2022-11-26 00:59:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:21,535 INFO L225 Difference]: With dead ends: 839 [2022-11-26 00:59:21,535 INFO L226 Difference]: Without dead ends: 473 [2022-11-26 00:59:21,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:59:21,539 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 177 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:21,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 510 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:59:21,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-26 00:59:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 433. [2022-11-26 00:59:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.1329479768786128) internal successors, (392), 335 states have internal predecessors, (392), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (107), 77 states have call predecessors, (107), 49 states have call successors, (107) [2022-11-26 00:59:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 549 transitions. [2022-11-26 00:59:21,572 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 549 transitions. Word has length 87 [2022-11-26 00:59:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:21,573 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 549 transitions. [2022-11-26 00:59:21,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:59:21,573 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 549 transitions. [2022-11-26 00:59:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-26 00:59:21,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:21,575 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:21,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:21,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:21,782 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:21,783 INFO L85 PathProgramCache]: Analyzing trace with hash 375246234, now seen corresponding path program 1 times [2022-11-26 00:59:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:21,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142522318] [2022-11-26 00:59:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:59:22,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142522318] [2022-11-26 00:59:22,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142522318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:22,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168002480] [2022-11-26 00:59:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:22,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:22,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:22,084 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:22,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:59:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:59:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:59:22,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-26 00:59:22,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168002480] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427328013] [2022-11-26 00:59:22,496 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:22,496 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:22,497 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:22,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:22,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-26 00:59:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248347445] [2022-11-26 00:59:22,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:22,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:59:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:59:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:59:22,501 INFO L87 Difference]: Start difference. First operand 433 states and 549 transitions. Second operand has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:22,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:22,989 INFO L93 Difference]: Finished difference Result 782 states and 991 transitions. [2022-11-26 00:59:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:59:22,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 88 [2022-11-26 00:59:22,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:22,993 INFO L225 Difference]: With dead ends: 782 [2022-11-26 00:59:22,994 INFO L226 Difference]: Without dead ends: 437 [2022-11-26 00:59:22,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 168 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:59:22,998 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 134 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:22,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 538 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:59:23,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-26 00:59:23,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2022-11-26 00:59:23,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 340 states have (on average 1.1352941176470588) internal successors, (386), 332 states have internal predecessors, (386), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (104), 74 states have call predecessors, (104), 49 states have call successors, (104) [2022-11-26 00:59:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2022-11-26 00:59:23,030 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 88 [2022-11-26 00:59:23,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:23,031 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2022-11-26 00:59:23,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-26 00:59:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2022-11-26 00:59:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-26 00:59:23,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:23,034 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:23,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:23,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:23,240 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:23,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:23,241 INFO L85 PathProgramCache]: Analyzing trace with hash -627082395, now seen corresponding path program 1 times [2022-11-26 00:59:23,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:23,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220178167] [2022-11-26 00:59:23,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:23,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:23,631 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-26 00:59:23,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:23,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220178167] [2022-11-26 00:59:23,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220178167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:23,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603860987] [2022-11-26 00:59:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:23,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:23,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:23,633 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:23,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:59:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:23,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:23,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-26 00:59:23,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-26 00:59:24,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603860987] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:24,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865758643] [2022-11-26 00:59:24,227 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-26 00:59:24,227 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:24,228 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:24,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:24,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 7] total 31 [2022-11-26 00:59:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109325048] [2022-11-26 00:59:24,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:24,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:59:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:59:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:59:24,231 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-26 00:59:26,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:26,529 INFO L93 Difference]: Finished difference Result 893 states and 1204 transitions. [2022-11-26 00:59:26,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-26 00:59:26,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 91 [2022-11-26 00:59:26,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:26,534 INFO L225 Difference]: With dead ends: 893 [2022-11-26 00:59:26,534 INFO L226 Difference]: Without dead ends: 540 [2022-11-26 00:59:26,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2022-11-26 00:59:26,539 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 335 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:26,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 154 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-26 00:59:26,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-26 00:59:26,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 435. [2022-11-26 00:59:26,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 343 states have (on average 1.1137026239067056) internal successors, (382), 342 states have internal predecessors, (382), 53 states have call successors, (53), 20 states have call predecessors, (53), 35 states have return successors, (119), 72 states have call predecessors, (119), 52 states have call successors, (119) [2022-11-26 00:59:26,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 554 transitions. [2022-11-26 00:59:26,572 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 554 transitions. Word has length 91 [2022-11-26 00:59:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:26,573 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 554 transitions. [2022-11-26 00:59:26,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-26 00:59:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 554 transitions. [2022-11-26 00:59:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-26 00:59:26,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:26,575 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:26,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-26 00:59:26,782 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1564473870, now seen corresponding path program 1 times [2022-11-26 00:59:26,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:26,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666966225] [2022-11-26 00:59:26,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:26,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 47 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:59:27,218 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666966225] [2022-11-26 00:59:27,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666966225] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434579598] [2022-11-26 00:59:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:27,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:27,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:27,220 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:27,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:59:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-26 00:59:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-26 00:59:27,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-26 00:59:28,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434579598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:28,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [728339954] [2022-11-26 00:59:28,178 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:28,178 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:28,178 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:28,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:28,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 11] total 36 [2022-11-26 00:59:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125246516] [2022-11-26 00:59:28,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:28,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 00:59:28,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 00:59:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:59:28,186 INFO L87 Difference]: Start difference. First operand 435 states and 554 transitions. Second operand has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-26 00:59:32,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:32,954 INFO L93 Difference]: Finished difference Result 1210 states and 1750 transitions. [2022-11-26 00:59:32,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-26 00:59:32,955 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 92 [2022-11-26 00:59:32,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:32,962 INFO L225 Difference]: With dead ends: 1210 [2022-11-26 00:59:32,962 INFO L226 Difference]: Without dead ends: 810 [2022-11-26 00:59:32,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1523, Invalid=10687, Unknown=0, NotChecked=0, Total=12210 [2022-11-26 00:59:32,971 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 474 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:32,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 266 Invalid, 3475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-26 00:59:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-26 00:59:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 597. [2022-11-26 00:59:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 475 states have (on average 1.1157894736842104) internal successors, (530), 460 states have internal predecessors, (530), 69 states have call successors, (69), 19 states have call predecessors, (69), 49 states have return successors, (307), 117 states have call predecessors, (307), 68 states have call successors, (307) [2022-11-26 00:59:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 906 transitions. [2022-11-26 00:59:33,035 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 906 transitions. Word has length 92 [2022-11-26 00:59:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:33,036 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 906 transitions. [2022-11-26 00:59:33,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-26 00:59:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 906 transitions. [2022-11-26 00:59:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-26 00:59:33,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:33,040 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:33,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:33,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:33,247 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:33,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -82062030, now seen corresponding path program 1 times [2022-11-26 00:59:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838050017] [2022-11-26 00:59:33,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-26 00:59:33,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838050017] [2022-11-26 00:59:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838050017] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788264291] [2022-11-26 00:59:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:33,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:33,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:33,353 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:33,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:59:33,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:59:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 33 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:59:33,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 33 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:59:34,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788264291] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:34,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1759708895] [2022-11-26 00:59:34,098 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:34,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:34,099 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:34,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:34,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 21 [2022-11-26 00:59:34,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931742827] [2022-11-26 00:59:34,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:34,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:59:34,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:34,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:59:34,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:59:34,104 INFO L87 Difference]: Start difference. First operand 597 states and 906 transitions. Second operand has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:59:34,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:34,784 INFO L93 Difference]: Finished difference Result 1138 states and 1880 transitions. [2022-11-26 00:59:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-26 00:59:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 105 [2022-11-26 00:59:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:34,790 INFO L225 Difference]: With dead ends: 1138 [2022-11-26 00:59:34,791 INFO L226 Difference]: Without dead ends: 607 [2022-11-26 00:59:34,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 189 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:59:34,799 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 180 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:34,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 526 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:59:34,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-26 00:59:34,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 597. [2022-11-26 00:59:34,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 475 states have (on average 1.1157894736842104) internal successors, (530), 460 states have internal predecessors, (530), 69 states have call successors, (69), 19 states have call predecessors, (69), 49 states have return successors, (305), 117 states have call predecessors, (305), 68 states have call successors, (305) [2022-11-26 00:59:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 904 transitions. [2022-11-26 00:59:34,909 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 904 transitions. Word has length 105 [2022-11-26 00:59:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:34,909 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 904 transitions. [2022-11-26 00:59:34,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-26 00:59:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 904 transitions. [2022-11-26 00:59:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-26 00:59:34,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:34,912 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:34,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:35,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-26 00:59:35,119 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1459155797, now seen corresponding path program 2 times [2022-11-26 00:59:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:35,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798802384] [2022-11-26 00:59:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:35,576 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-26 00:59:35,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798802384] [2022-11-26 00:59:35,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798802384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:35,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246696098] [2022-11-26 00:59:35,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:35,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:35,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:35,579 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:35,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:59:35,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:59:35,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:35,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:35,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-26 00:59:35,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-26 00:59:35,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246696098] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:35,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [129744663] [2022-11-26 00:59:35,999 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:36,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:36,001 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:36,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:36,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-11-26 00:59:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301923687] [2022-11-26 00:59:36,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:36,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-26 00:59:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:36,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-26 00:59:36,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-26 00:59:36,006 INFO L87 Difference]: Start difference. First operand 597 states and 904 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-26 00:59:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:36,677 INFO L93 Difference]: Finished difference Result 1034 states and 1653 transitions. [2022-11-26 00:59:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-26 00:59:36,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) Word has length 106 [2022-11-26 00:59:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:36,687 INFO L225 Difference]: With dead ends: 1034 [2022-11-26 00:59:36,687 INFO L226 Difference]: Without dead ends: 1031 [2022-11-26 00:59:36,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 00:59:36,690 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 49 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:36,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 600 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:59:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-11-26 00:59:36,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 782. [2022-11-26 00:59:36,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 626 states have (on average 1.1086261980830672) internal successors, (694), 598 states have internal predecessors, (694), 85 states have call successors, (85), 19 states have call predecessors, (85), 67 states have return successors, (525), 164 states have call predecessors, (525), 84 states have call successors, (525) [2022-11-26 00:59:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1304 transitions. [2022-11-26 00:59:36,794 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1304 transitions. Word has length 106 [2022-11-26 00:59:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:36,795 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1304 transitions. [2022-11-26 00:59:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-26 00:59:36,795 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1304 transitions. [2022-11-26 00:59:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-26 00:59:36,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:36,797 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:59:36,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:37,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-26 00:59:37,004 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:37,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:37,004 INFO L85 PathProgramCache]: Analyzing trace with hash 2010810646, now seen corresponding path program 1 times [2022-11-26 00:59:37,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:37,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297596853] [2022-11-26 00:59:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:37,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-26 00:59:37,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:37,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297596853] [2022-11-26 00:59:37,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297596853] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:37,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268694409] [2022-11-26 00:59:37,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:37,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:37,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:37,427 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:37,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:59:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:37,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-26 00:59:37,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-26 00:59:37,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-26 00:59:38,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268694409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:38,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377387044] [2022-11-26 00:59:38,440 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:38,440 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:38,440 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:38,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:38,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-11-26 00:59:38,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411151009] [2022-11-26 00:59:38,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:38,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:59:38,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:38,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:59:38,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:59:38,448 INFO L87 Difference]: Start difference. First operand 782 states and 1304 transitions. Second operand has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-26 00:59:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:39,270 INFO L93 Difference]: Finished difference Result 1492 states and 2676 transitions. [2022-11-26 00:59:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-26 00:59:39,271 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) Word has length 107 [2022-11-26 00:59:39,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:39,288 INFO L225 Difference]: With dead ends: 1492 [2022-11-26 00:59:39,288 INFO L226 Difference]: Without dead ends: 1490 [2022-11-26 00:59:39,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 191 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2022-11-26 00:59:39,292 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 60 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:39,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 484 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:59:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-26 00:59:39,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1000. [2022-11-26 00:59:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 798 states have (on average 1.0927318295739348) internal successors, (872), 765 states have internal predecessors, (872), 106 states have call successors, (106), 19 states have call predecessors, (106), 92 states have return successors, (946), 215 states have call predecessors, (946), 105 states have call successors, (946) [2022-11-26 00:59:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1924 transitions. [2022-11-26 00:59:39,430 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1924 transitions. Word has length 107 [2022-11-26 00:59:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:39,431 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1924 transitions. [2022-11-26 00:59:39,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-26 00:59:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1924 transitions. [2022-11-26 00:59:39,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-26 00:59:39,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:39,434 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:59:39,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:39,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-26 00:59:39,646 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1158692948, now seen corresponding path program 1 times [2022-11-26 00:59:39,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:39,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044488129] [2022-11-26 00:59:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-26 00:59:39,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044488129] [2022-11-26 00:59:39,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044488129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:39,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919548943] [2022-11-26 00:59:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:39,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:39,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:39,979 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:39,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-26 00:59:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:40,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:59:40,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:40,189 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-26 00:59:40,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-26 00:59:40,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919548943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1476944532] [2022-11-26 00:59:40,607 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:40,608 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:40,608 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:40,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:40,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-11-26 00:59:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278390425] [2022-11-26 00:59:40,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 00:59:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 00:59:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-26 00:59:40,610 INFO L87 Difference]: Start difference. First operand 1000 states and 1924 transitions. Second operand has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:59:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:41,141 INFO L93 Difference]: Finished difference Result 1988 states and 3955 transitions. [2022-11-26 00:59:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 00:59:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 141 [2022-11-26 00:59:41,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:41,154 INFO L225 Difference]: With dead ends: 1988 [2022-11-26 00:59:41,155 INFO L226 Difference]: Without dead ends: 1057 [2022-11-26 00:59:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 274 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-26 00:59:41,164 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 134 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:41,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 436 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:59:41,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-11-26 00:59:41,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1019. [2022-11-26 00:59:41,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 813 states have (on average 1.0910209102091022) internal successors, (887), 780 states have internal predecessors, (887), 107 states have call successors, (107), 19 states have call predecessors, (107), 95 states have return successors, (951), 219 states have call predecessors, (951), 106 states have call successors, (951) [2022-11-26 00:59:41,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1945 transitions. [2022-11-26 00:59:41,289 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1945 transitions. Word has length 141 [2022-11-26 00:59:41,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:41,289 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1945 transitions. [2022-11-26 00:59:41,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-26 00:59:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1945 transitions. [2022-11-26 00:59:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-11-26 00:59:41,294 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:41,294 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 8, 8, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-26 00:59:41,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:41,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-26 00:59:41,506 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:41,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:41,506 INFO L85 PathProgramCache]: Analyzing trace with hash 680282268, now seen corresponding path program 1 times [2022-11-26 00:59:41,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:41,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528196697] [2022-11-26 00:59:41,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:41,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:41,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 94 proven. 244 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2022-11-26 00:59:41,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528196697] [2022-11-26 00:59:41,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528196697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:41,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859496183] [2022-11-26 00:59:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:41,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:41,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:41,937 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:41,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-26 00:59:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:42,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:59:42,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:42,390 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 101 proven. 162 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-26 00:59:42,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 101 proven. 162 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-26 00:59:42,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859496183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:42,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730463431] [2022-11-26 00:59:42,991 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:42,991 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:42,991 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:42,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:42,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 34 [2022-11-26 00:59:42,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44739022] [2022-11-26 00:59:42,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:42,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:59:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:42,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:59:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:59:42,994 INFO L87 Difference]: Start difference. First operand 1019 states and 1945 transitions. Second operand has 34 states, 32 states have (on average 4.34375) internal successors, (139), 26 states have internal predecessors, (139), 18 states have call successors, (26), 9 states have call predecessors, (26), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-26 00:59:44,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:44,296 INFO L93 Difference]: Finished difference Result 1666 states and 3299 transitions. [2022-11-26 00:59:44,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-26 00:59:44,297 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.34375) internal successors, (139), 26 states have internal predecessors, (139), 18 states have call successors, (26), 9 states have call predecessors, (26), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 194 [2022-11-26 00:59:44,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:44,302 INFO L225 Difference]: With dead ends: 1666 [2022-11-26 00:59:44,302 INFO L226 Difference]: Without dead ends: 682 [2022-11-26 00:59:44,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 370 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-11-26 00:59:44,314 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 538 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:44,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 661 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:59:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-26 00:59:44,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 624. [2022-11-26 00:59:44,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 495 states have (on average 1.0767676767676768) internal successors, (533), 486 states have internal predecessors, (533), 68 states have call successors, (68), 21 states have call predecessors, (68), 57 states have return successors, (315), 116 states have call predecessors, (315), 67 states have call successors, (315) [2022-11-26 00:59:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 916 transitions. [2022-11-26 00:59:44,361 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 916 transitions. Word has length 194 [2022-11-26 00:59:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:44,361 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 916 transitions. [2022-11-26 00:59:44,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.34375) internal successors, (139), 26 states have internal predecessors, (139), 18 states have call successors, (26), 9 states have call predecessors, (26), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-11-26 00:59:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 916 transitions. [2022-11-26 00:59:44,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-26 00:59:44,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:44,365 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-26 00:59:44,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:44,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:44,575 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:44,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:44,576 INFO L85 PathProgramCache]: Analyzing trace with hash 627029859, now seen corresponding path program 2 times [2022-11-26 00:59:44,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:44,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132846092] [2022-11-26 00:59:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:44,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:44,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 130 proven. 127 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-26 00:59:44,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132846092] [2022-11-26 00:59:44,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132846092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:44,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87147991] [2022-11-26 00:59:44,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:44,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:44,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:44,985 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:45,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-26 00:59:45,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:59:45,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:45,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 134 proven. 4 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-26 00:59:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 134 proven. 4 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-26 00:59:45,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87147991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:45,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176069235] [2022-11-26 00:59:45,589 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:45,590 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:45,590 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:45,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:45,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 22 [2022-11-26 00:59:45,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911342534] [2022-11-26 00:59:45,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:45,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-26 00:59:45,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:45,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-26 00:59:45,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:59:45,593 INFO L87 Difference]: Start difference. First operand 624 states and 916 transitions. Second operand has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 18 states have internal predecessors, (107), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-26 00:59:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:46,152 INFO L93 Difference]: Finished difference Result 1177 states and 1883 transitions. [2022-11-26 00:59:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:59:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 18 states have internal predecessors, (107), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 161 [2022-11-26 00:59:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:46,157 INFO L225 Difference]: With dead ends: 1177 [2022-11-26 00:59:46,157 INFO L226 Difference]: Without dead ends: 628 [2022-11-26 00:59:46,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 318 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:59:46,162 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 268 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:46,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 203 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:59:46,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-11-26 00:59:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 540. [2022-11-26 00:59:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 425 states have (on average 1.0635294117647058) internal successors, (452), 426 states have internal predecessors, (452), 61 states have call successors, (61), 22 states have call predecessors, (61), 50 states have return successors, (210), 91 states have call predecessors, (210), 60 states have call successors, (210) [2022-11-26 00:59:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 723 transitions. [2022-11-26 00:59:46,200 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 723 transitions. Word has length 161 [2022-11-26 00:59:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:46,201 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 723 transitions. [2022-11-26 00:59:46,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.095238095238095) internal successors, (107), 18 states have internal predecessors, (107), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-26 00:59:46,202 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 723 transitions. [2022-11-26 00:59:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-11-26 00:59:46,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:46,205 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1] [2022-11-26 00:59:46,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:46,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:46,410 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:46,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1849576022, now seen corresponding path program 3 times [2022-11-26 00:59:46,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:46,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870007662] [2022-11-26 00:59:46,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:46,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 156 proven. 151 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-11-26 00:59:46,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870007662] [2022-11-26 00:59:46,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870007662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:46,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918958461] [2022-11-26 00:59:46,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:46,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:46,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:46,837 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:46,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-26 00:59:46,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:59:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 150 proven. 176 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-11-26 00:59:47,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 150 proven. 189 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-26 00:59:48,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918958461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48341811] [2022-11-26 00:59:48,681 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:48,682 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:48,683 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:48,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:48,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 19] total 34 [2022-11-26 00:59:48,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073294506] [2022-11-26 00:59:48,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:48,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-26 00:59:48,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:48,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-26 00:59:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:59:48,689 INFO L87 Difference]: Start difference. First operand 540 states and 723 transitions. Second operand has 34 states, 33 states have (on average 5.03030303030303) internal successors, (166), 30 states have internal predecessors, (166), 23 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2022-11-26 00:59:50,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:50,355 INFO L93 Difference]: Finished difference Result 1151 states and 1806 transitions. [2022-11-26 00:59:50,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-26 00:59:50,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 5.03030303030303) internal successors, (166), 30 states have internal predecessors, (166), 23 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) Word has length 179 [2022-11-26 00:59:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:50,361 INFO L225 Difference]: With dead ends: 1151 [2022-11-26 00:59:50,361 INFO L226 Difference]: Without dead ends: 651 [2022-11-26 00:59:50,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 338 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=599, Invalid=3183, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:59:50,368 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 442 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1321 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 1321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:50,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 321 Invalid, 1584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 1321 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-26 00:59:50,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-11-26 00:59:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 624. [2022-11-26 00:59:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 493 states have (on average 1.0588235294117647) internal successors, (522), 490 states have internal predecessors, (522), 70 states have call successors, (70), 28 states have call predecessors, (70), 57 states have return successors, (240), 105 states have call predecessors, (240), 69 states have call successors, (240) [2022-11-26 00:59:50,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 832 transitions. [2022-11-26 00:59:50,419 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 832 transitions. Word has length 179 [2022-11-26 00:59:50,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:50,421 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 832 transitions. [2022-11-26 00:59:50,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 5.03030303030303) internal successors, (166), 30 states have internal predecessors, (166), 23 states have call successors, (29), 5 states have call predecessors, (29), 9 states have return successors, (27), 10 states have call predecessors, (27), 19 states have call successors, (27) [2022-11-26 00:59:50,422 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 832 transitions. [2022-11-26 00:59:50,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-26 00:59:50,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:50,424 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-26 00:59:50,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:50,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-26 00:59:50,631 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:50,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1752795634, now seen corresponding path program 4 times [2022-11-26 00:59:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:50,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402592545] [2022-11-26 00:59:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:51,224 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 45 proven. 85 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-26 00:59:51,224 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:51,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402592545] [2022-11-26 00:59:51,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402592545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:51,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277382977] [2022-11-26 00:59:51,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:59:51,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:51,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:51,228 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:51,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-26 00:59:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:59:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:51,615 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 45 proven. 59 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-26 00:59:51,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 74 proven. 54 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-26 00:59:52,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277382977] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234344335] [2022-11-26 00:59:52,976 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:52,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:52,977 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:52,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:52,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2022-11-26 00:59:52,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829394979] [2022-11-26 00:59:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-26 00:59:52,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-26 00:59:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-11-26 00:59:52,981 INFO L87 Difference]: Start difference. First operand 624 states and 832 transitions. Second operand has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-26 00:59:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:53,615 INFO L93 Difference]: Finished difference Result 828 states and 1118 transitions. [2022-11-26 00:59:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-26 00:59:53,615 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) Word has length 160 [2022-11-26 00:59:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:53,620 INFO L225 Difference]: With dead ends: 828 [2022-11-26 00:59:53,621 INFO L226 Difference]: Without dead ends: 811 [2022-11-26 00:59:53,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 291 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=3081, Unknown=0, NotChecked=0, Total=3540 [2022-11-26 00:59:53,623 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 35 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:53,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 969 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:59:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-11-26 00:59:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 664. [2022-11-26 00:59:53,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 525 states have (on average 1.0476190476190477) internal successors, (550), 521 states have internal predecessors, (550), 72 states have call successors, (72), 28 states have call predecessors, (72), 63 states have return successors, (253), 114 states have call predecessors, (253), 71 states have call successors, (253) [2022-11-26 00:59:53,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 875 transitions. [2022-11-26 00:59:53,687 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 875 transitions. Word has length 160 [2022-11-26 00:59:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:53,688 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 875 transitions. [2022-11-26 00:59:53,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-11-26 00:59:53,688 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 875 transitions. [2022-11-26 00:59:53,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-11-26 00:59:53,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:53,692 INFO L195 NwaCegarLoop]: trace histogram [14, 12, 11, 11, 10, 10, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1] [2022-11-26 00:59:53,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:53,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:53,897 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2145270459, now seen corresponding path program 2 times [2022-11-26 00:59:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:53,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786070481] [2022-11-26 00:59:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:53,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:53,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 143 proven. 154 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-26 00:59:54,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:54,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786070481] [2022-11-26 00:59:54,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786070481] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:54,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43288862] [2022-11-26 00:59:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:59:54,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:54,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:54,152 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:54,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-26 00:59:54,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:59:54,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:54,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:59:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 219 proven. 7 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-11-26 00:59:54,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:54,848 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 219 proven. 7 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-11-26 00:59:54,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43288862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:54,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [254914919] [2022-11-26 00:59:54,850 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:54,850 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:54,851 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:54,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:54,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-11-26 00:59:54,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77725613] [2022-11-26 00:59:54,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:54,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:59:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:54,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:59:54,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:59:54,854 INFO L87 Difference]: Start difference. First operand 664 states and 875 transitions. Second operand has 21 states, 20 states have (on average 5.15) internal successors, (103), 18 states have internal predecessors, (103), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-26 00:59:55,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:55,564 INFO L93 Difference]: Finished difference Result 1345 states and 1885 transitions. [2022-11-26 00:59:55,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-26 00:59:55,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.15) internal successors, (103), 18 states have internal predecessors, (103), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) Word has length 233 [2022-11-26 00:59:55,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:55,569 INFO L225 Difference]: With dead ends: 1345 [2022-11-26 00:59:55,569 INFO L226 Difference]: Without dead ends: 757 [2022-11-26 00:59:55,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 458 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:59:55,573 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 207 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:55,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 458 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:59:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-11-26 00:59:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 670. [2022-11-26 00:59:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 531 states have (on average 1.0470809792843692) internal successors, (556), 525 states have internal predecessors, (556), 72 states have call successors, (72), 29 states have call predecessors, (72), 63 states have return successors, (245), 115 states have call predecessors, (245), 71 states have call successors, (245) [2022-11-26 00:59:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 873 transitions. [2022-11-26 00:59:55,620 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 873 transitions. Word has length 233 [2022-11-26 00:59:55,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:55,620 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 873 transitions. [2022-11-26 00:59:55,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.15) internal successors, (103), 18 states have internal predecessors, (103), 9 states have call successors, (17), 4 states have call predecessors, (17), 6 states have return successors, (15), 9 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-26 00:59:55,621 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 873 transitions. [2022-11-26 00:59:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-11-26 00:59:55,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:55,625 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 4, 3, 3, 1, 1, 1] [2022-11-26 00:59:55,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:55,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:55,831 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 144460700, now seen corresponding path program 3 times [2022-11-26 00:59:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:55,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518872671] [2022-11-26 00:59:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:59:56,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 291 proven. 234 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2022-11-26 00:59:56,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:59:56,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518872671] [2022-11-26 00:59:56,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518872671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:59:56,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295356421] [2022-11-26 00:59:56,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:59:56,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:59:56,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:59:56,263 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:59:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-26 00:59:56,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:59:56,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:59:56,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 00:59:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:59:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 480 proven. 88 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2022-11-26 00:59:56,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:59:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1420 backedges. 480 proven. 94 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2022-11-26 00:59:57,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295356421] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:59:57,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [235535249] [2022-11-26 00:59:57,814 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 00:59:57,814 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:59:57,815 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 00:59:57,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:59:57,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 15] total 31 [2022-11-26 00:59:57,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669974039] [2022-11-26 00:59:57,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:59:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-26 00:59:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:59:57,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-26 00:59:57,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-11-26 00:59:57,828 INFO L87 Difference]: Start difference. First operand 670 states and 873 transitions. Second operand has 31 states, 30 states have (on average 5.166666666666667) internal successors, (155), 28 states have internal predecessors, (155), 19 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (27), 12 states have call predecessors, (27), 16 states have call successors, (27) [2022-11-26 00:59:58,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:59:58,749 INFO L93 Difference]: Finished difference Result 1357 states and 1867 transitions. [2022-11-26 00:59:58,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 00:59:58,750 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.166666666666667) internal successors, (155), 28 states have internal predecessors, (155), 19 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (27), 12 states have call predecessors, (27), 16 states have call successors, (27) Word has length 291 [2022-11-26 00:59:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:59:58,758 INFO L225 Difference]: With dead ends: 1357 [2022-11-26 00:59:58,759 INFO L226 Difference]: Without dead ends: 773 [2022-11-26 00:59:58,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 564 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=1925, Unknown=0, NotChecked=0, Total=2256 [2022-11-26 00:59:58,763 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 246 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:59:58,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 352 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:59:58,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-11-26 00:59:58,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2022-11-26 00:59:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 571 states have (on average 1.042031523642732) internal successors, (595), 563 states have internal predecessors, (595), 75 states have call successors, (75), 33 states have call predecessors, (75), 68 states have return successors, (265), 121 states have call predecessors, (265), 74 states have call successors, (265) [2022-11-26 00:59:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 935 transitions. [2022-11-26 00:59:58,812 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 935 transitions. Word has length 291 [2022-11-26 00:59:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:59:58,813 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 935 transitions. [2022-11-26 00:59:58,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.166666666666667) internal successors, (155), 28 states have internal predecessors, (155), 19 states have call successors, (26), 4 states have call predecessors, (26), 10 states have return successors, (27), 12 states have call predecessors, (27), 16 states have call successors, (27) [2022-11-26 00:59:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 935 transitions. [2022-11-26 00:59:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-26 00:59:58,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:59:58,818 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1] [2022-11-26 00:59:58,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-26 00:59:59,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-26 00:59:59,027 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 00:59:59,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:59:59,028 INFO L85 PathProgramCache]: Analyzing trace with hash -134365163, now seen corresponding path program 4 times [2022-11-26 00:59:59,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:59:59,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754913283] [2022-11-26 00:59:59,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:59:59,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:59:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 149 proven. 248 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-26 01:00:00,318 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:00,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754913283] [2022-11-26 01:00:00,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754913283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:00,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047470066] [2022-11-26 01:00:00,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:00:00,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:00,320 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:00,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-26 01:00:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:00,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-26 01:00:00,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:00,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 148 proven. 181 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-26 01:00:00,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:04,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 218 proven. 160 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2022-11-26 01:00:04,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047470066] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:04,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329656393] [2022-11-26 01:00:04,020 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:04,021 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:04,021 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:04,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:04,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 29] total 56 [2022-11-26 01:00:04,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211886480] [2022-11-26 01:00:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:04,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-26 01:00:04,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-26 01:00:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2022-11-26 01:00:04,026 INFO L87 Difference]: Start difference. First operand 718 states and 935 transitions. Second operand has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2022-11-26 01:00:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:04,674 INFO L93 Difference]: Finished difference Result 905 states and 1163 transitions. [2022-11-26 01:00:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-26 01:00:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) Word has length 252 [2022-11-26 01:00:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:04,681 INFO L225 Difference]: With dead ends: 905 [2022-11-26 01:00:04,681 INFO L226 Difference]: Without dead ends: 897 [2022-11-26 01:00:04,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 469 SyntacticMatches, 27 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=663, Invalid=4593, Unknown=0, NotChecked=0, Total=5256 [2022-11-26 01:00:04,684 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 49 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:04,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 716 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:00:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-11-26 01:00:04,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 668. [2022-11-26 01:00:04,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 530 states have (on average 1.0358490566037737) internal successors, (549), 525 states have internal predecessors, (549), 71 states have call successors, (71), 33 states have call predecessors, (71), 63 states have return successors, (226), 109 states have call predecessors, (226), 70 states have call successors, (226) [2022-11-26 01:00:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 846 transitions. [2022-11-26 01:00:04,734 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 846 transitions. Word has length 252 [2022-11-26 01:00:04,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:04,735 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 846 transitions. [2022-11-26 01:00:04,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2022-11-26 01:00:04,735 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 846 transitions. [2022-11-26 01:00:04,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-11-26 01:00:04,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:04,743 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 18, 16, 15, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 4, 1, 1, 1] [2022-11-26 01:00:04,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:04,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:04,949 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:04,949 INFO L85 PathProgramCache]: Analyzing trace with hash 940131501, now seen corresponding path program 2 times [2022-11-26 01:00:04,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:04,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540119393] [2022-11-26 01:00:04,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:04,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:04,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 348 proven. 225 refuted. 0 times theorem prover too weak. 1928 trivial. 0 not checked. [2022-11-26 01:00:05,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:05,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540119393] [2022-11-26 01:00:05,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540119393] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:05,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773377443] [2022-11-26 01:00:05,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:00:05,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:05,392 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:05,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-26 01:00:05,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 01:00:05,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:00:05,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:05,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 434 proven. 6 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2022-11-26 01:00:05,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 434 proven. 6 refuted. 0 times theorem prover too weak. 2061 trivial. 0 not checked. [2022-11-26 01:00:06,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773377443] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:06,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902890500] [2022-11-26 01:00:06,555 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:06,555 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:06,555 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:06,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:06,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 21 [2022-11-26 01:00:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796613912] [2022-11-26 01:00:06,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 01:00:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 01:00:06,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-11-26 01:00:06,561 INFO L87 Difference]: Start difference. First operand 668 states and 846 transitions. Second operand has 21 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-26 01:00:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:07,286 INFO L93 Difference]: Finished difference Result 1311 states and 1749 transitions. [2022-11-26 01:00:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-26 01:00:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) Word has length 381 [2022-11-26 01:00:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:07,292 INFO L225 Difference]: With dead ends: 1311 [2022-11-26 01:00:07,292 INFO L226 Difference]: Without dead ends: 706 [2022-11-26 01:00:07,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 753 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 01:00:07,296 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 248 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:07,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 275 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:00:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-11-26 01:00:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 647. [2022-11-26 01:00:07,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 513 states have (on average 1.037037037037037) internal successors, (532), 509 states have internal predecessors, (532), 71 states have call successors, (71), 34 states have call predecessors, (71), 59 states have return successors, (198), 103 states have call predecessors, (198), 70 states have call successors, (198) [2022-11-26 01:00:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 801 transitions. [2022-11-26 01:00:07,337 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 801 transitions. Word has length 381 [2022-11-26 01:00:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:07,338 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 801 transitions. [2022-11-26 01:00:07,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.4) internal successors, (108), 19 states have internal predecessors, (108), 11 states have call successors, (17), 3 states have call predecessors, (17), 8 states have return successors, (17), 8 states have call predecessors, (17), 9 states have call successors, (17) [2022-11-26 01:00:07,338 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 801 transitions. [2022-11-26 01:00:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2022-11-26 01:00:07,348 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:07,349 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 21, 20, 20, 18, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 7, 5, 3, 1, 1, 1] [2022-11-26 01:00:07,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:07,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-26 01:00:07,558 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:07,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:07,559 INFO L85 PathProgramCache]: Analyzing trace with hash -449841554, now seen corresponding path program 3 times [2022-11-26 01:00:07,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:07,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83727821] [2022-11-26 01:00:07,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:07,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3743 backedges. 594 proven. 371 refuted. 0 times theorem prover too weak. 2778 trivial. 0 not checked. [2022-11-26 01:00:08,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:08,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83727821] [2022-11-26 01:00:08,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83727821] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:08,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360647696] [2022-11-26 01:00:08,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:00:08,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:08,255 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:08,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-26 01:00:08,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:00:08,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 01:00:08,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3743 backedges. 587 proven. 1051 refuted. 0 times theorem prover too weak. 2105 trivial. 0 not checked. [2022-11-26 01:00:08,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:11,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3743 backedges. 587 proven. 1087 refuted. 0 times theorem prover too weak. 2069 trivial. 0 not checked. [2022-11-26 01:00:11,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360647696] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:11,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576989251] [2022-11-26 01:00:11,549 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:11,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:11,550 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:11,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:11,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 25] total 36 [2022-11-26 01:00:11,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441043992] [2022-11-26 01:00:11,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:11,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-26 01:00:11,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-26 01:00:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-11-26 01:00:11,554 INFO L87 Difference]: Start difference. First operand 647 states and 801 transitions. Second operand has 36 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 26 states have call successors, (34), 3 states have call predecessors, (34), 12 states have return successors, (37), 15 states have call predecessors, (37), 24 states have call successors, (37) [2022-11-26 01:00:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:13,194 INFO L93 Difference]: Finished difference Result 1306 states and 1714 transitions. [2022-11-26 01:00:13,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-26 01:00:13,194 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 26 states have call successors, (34), 3 states have call predecessors, (34), 12 states have return successors, (37), 15 states have call predecessors, (37), 24 states have call successors, (37) Word has length 460 [2022-11-26 01:00:13,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:13,198 INFO L225 Difference]: With dead ends: 1306 [2022-11-26 01:00:13,198 INFO L226 Difference]: Without dead ends: 664 [2022-11-26 01:00:13,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 968 GetRequests, 891 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=659, Invalid=3763, Unknown=0, NotChecked=0, Total=4422 [2022-11-26 01:00:13,203 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 415 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:13,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 436 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 01:00:13,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-26 01:00:13,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 617. [2022-11-26 01:00:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 491 states have (on average 1.0386965376782078) internal successors, (510), 484 states have internal predecessors, (510), 69 states have call successors, (69), 39 states have call predecessors, (69), 53 states have return successors, (162), 93 states have call predecessors, (162), 68 states have call successors, (162) [2022-11-26 01:00:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 741 transitions. [2022-11-26 01:00:13,241 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 741 transitions. Word has length 460 [2022-11-26 01:00:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:13,242 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 741 transitions. [2022-11-26 01:00:13,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 26 states have call successors, (34), 3 states have call predecessors, (34), 12 states have return successors, (37), 15 states have call predecessors, (37), 24 states have call successors, (37) [2022-11-26 01:00:13,243 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 741 transitions. [2022-11-26 01:00:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-11-26 01:00:13,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:13,246 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 15, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 5, 4, 1, 1, 1] [2022-11-26 01:00:13,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:13,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-26 01:00:13,453 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:13,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:13,453 INFO L85 PathProgramCache]: Analyzing trace with hash 652688025, now seen corresponding path program 4 times [2022-11-26 01:00:13,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:13,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607236238] [2022-11-26 01:00:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:13,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2762 backedges. 256 proven. 469 refuted. 0 times theorem prover too weak. 2037 trivial. 0 not checked. [2022-11-26 01:00:13,947 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607236238] [2022-11-26 01:00:13,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607236238] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:13,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690683960] [2022-11-26 01:00:13,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 01:00:13,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:13,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:13,949 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:13,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-26 01:00:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:14,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-26 01:00:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2762 backedges. 1585 proven. 178 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2022-11-26 01:00:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2762 backedges. 256 proven. 479 refuted. 0 times theorem prover too weak. 2027 trivial. 0 not checked. [2022-11-26 01:00:15,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690683960] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:15,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370567852] [2022-11-26 01:00:15,346 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:15,346 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:15,347 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:15,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:15,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 15] total 17 [2022-11-26 01:00:15,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346872317] [2022-11-26 01:00:15,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:15,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-26 01:00:15,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-26 01:00:15,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-11-26 01:00:15,351 INFO L87 Difference]: Start difference. First operand 617 states and 741 transitions. Second operand has 17 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-26 01:00:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:15,745 INFO L93 Difference]: Finished difference Result 1202 states and 1452 transitions. [2022-11-26 01:00:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-26 01:00:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 400 [2022-11-26 01:00:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:15,750 INFO L225 Difference]: With dead ends: 1202 [2022-11-26 01:00:15,750 INFO L226 Difference]: Without dead ends: 675 [2022-11-26 01:00:15,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 791 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:00:15,753 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 121 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:15,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 203 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:00:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-11-26 01:00:15,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 617. [2022-11-26 01:00:15,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 491 states have (on average 1.0386965376782078) internal successors, (510), 484 states have internal predecessors, (510), 69 states have call successors, (69), 39 states have call predecessors, (69), 53 states have return successors, (161), 93 states have call predecessors, (161), 68 states have call successors, (161) [2022-11-26 01:00:15,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 740 transitions. [2022-11-26 01:00:15,788 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 740 transitions. Word has length 400 [2022-11-26 01:00:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:15,788 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 740 transitions. [2022-11-26 01:00:15,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 7.5625) internal successors, (121), 15 states have internal predecessors, (121), 11 states have call successors, (21), 4 states have call predecessors, (21), 6 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-26 01:00:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 740 transitions. [2022-11-26 01:00:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-11-26 01:00:15,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:15,816 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 21, 20, 18, 17, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 7, 6, 5, 4, 1, 1, 1] [2022-11-26 01:00:15,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:16,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-26 01:00:16,017 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:16,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:16,017 INFO L85 PathProgramCache]: Analyzing trace with hash 2084745667, now seen corresponding path program 5 times [2022-11-26 01:00:16,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:16,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893126186] [2022-11-26 01:00:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:16,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3077 backedges. 634 proven. 232 refuted. 0 times theorem prover too weak. 2211 trivial. 0 not checked. [2022-11-26 01:00:16,577 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893126186] [2022-11-26 01:00:16,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893126186] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597465158] [2022-11-26 01:00:16,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:00:16,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:16,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:16,580 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:16,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-26 01:00:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-26 01:00:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:16,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 01:00:16,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3077 backedges. 664 proven. 6 refuted. 0 times theorem prover too weak. 2407 trivial. 0 not checked. [2022-11-26 01:00:16,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3077 backedges. 567 proven. 12 refuted. 0 times theorem prover too weak. 2498 trivial. 0 not checked. [2022-11-26 01:00:17,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597465158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:17,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676323910] [2022-11-26 01:00:17,976 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:17,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:17,977 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:17,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:17,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 23 [2022-11-26 01:00:17,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922242997] [2022-11-26 01:00:17,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:17,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:00:17,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:17,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:00:17,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:00:17,982 INFO L87 Difference]: Start difference. First operand 617 states and 740 transitions. Second operand has 23 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (24), 10 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-26 01:00:18,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:18,430 INFO L93 Difference]: Finished difference Result 1059 states and 1280 transitions. [2022-11-26 01:00:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-26 01:00:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (24), 10 states have call predecessors, (24), 11 states have call successors, (24) Word has length 421 [2022-11-26 01:00:18,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:18,435 INFO L225 Difference]: With dead ends: 1059 [2022-11-26 01:00:18,435 INFO L226 Difference]: Without dead ends: 541 [2022-11-26 01:00:18,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 869 GetRequests, 834 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-26 01:00:18,438 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 141 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:18,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 242 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 01:00:18,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-11-26 01:00:18,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 534. [2022-11-26 01:00:18,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 426 states have (on average 1.0422535211267605) internal successors, (444), 420 states have internal predecessors, (444), 60 states have call successors, (60), 38 states have call predecessors, (60), 44 states have return successors, (100), 75 states have call predecessors, (100), 59 states have call successors, (100) [2022-11-26 01:00:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 604 transitions. [2022-11-26 01:00:18,474 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 604 transitions. Word has length 421 [2022-11-26 01:00:18,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:18,475 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 604 transitions. [2022-11-26 01:00:18,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.545454545454546) internal successors, (122), 21 states have internal predecessors, (122), 13 states have call successors, (21), 4 states have call predecessors, (21), 8 states have return successors, (24), 10 states have call predecessors, (24), 11 states have call successors, (24) [2022-11-26 01:00:18,475 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 604 transitions. [2022-11-26 01:00:18,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-11-26 01:00:18,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:18,479 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 17, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 6, 4, 4, 1, 1, 1] [2022-11-26 01:00:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:18,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-26 01:00:18,686 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1497925245, now seen corresponding path program 6 times [2022-11-26 01:00:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549245445] [2022-11-26 01:00:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 236 proven. 896 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-26 01:00:21,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549245445] [2022-11-26 01:00:21,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549245445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:21,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599458731] [2022-11-26 01:00:21,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:00:21,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:21,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:21,846 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:21,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-26 01:00:22,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:00:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-26 01:00:22,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 781 proven. 51 refuted. 0 times theorem prover too weak. 1961 trivial. 0 not checked. [2022-11-26 01:00:22,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 781 proven. 51 refuted. 0 times theorem prover too weak. 1961 trivial. 0 not checked. [2022-11-26 01:00:25,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599458731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:25,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494479836] [2022-11-26 01:00:25,300 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:25,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:25,300 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:25,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:25,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21, 21] total 50 [2022-11-26 01:00:25,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36695258] [2022-11-26 01:00:25,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:25,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-26 01:00:25,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:25,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-26 01:00:25,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2022-11-26 01:00:25,305 INFO L87 Difference]: Start difference. First operand 534 states and 604 transitions. Second operand has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-26 01:00:26,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:26,029 INFO L93 Difference]: Finished difference Result 573 states and 651 transitions. [2022-11-26 01:00:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-26 01:00:26,029 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) Word has length 402 [2022-11-26 01:00:26,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:26,033 INFO L225 Difference]: With dead ends: 573 [2022-11-26 01:00:26,033 INFO L226 Difference]: Without dead ends: 571 [2022-11-26 01:00:26,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 898 GetRequests, 812 SyntacticMatches, 24 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=445, Invalid=3587, Unknown=0, NotChecked=0, Total=4032 [2022-11-26 01:00:26,035 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:26,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 913 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 01:00:26,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-11-26 01:00:26,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 520. [2022-11-26 01:00:26,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 415 states have (on average 1.0289156626506024) internal successors, (427), 410 states have internal predecessors, (427), 60 states have call successors, (60), 38 states have call predecessors, (60), 43 states have return successors, (99), 71 states have call predecessors, (99), 59 states have call successors, (99) [2022-11-26 01:00:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 586 transitions. [2022-11-26 01:00:26,070 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 586 transitions. Word has length 402 [2022-11-26 01:00:26,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:26,071 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 586 transitions. [2022-11-26 01:00:26,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-26 01:00:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 586 transitions. [2022-11-26 01:00:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-26 01:00:26,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:26,075 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 17, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 7, 6, 4, 4, 1, 1, 1] [2022-11-26 01:00:26,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:26,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:26,283 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:26,283 INFO L85 PathProgramCache]: Analyzing trace with hash 808957732, now seen corresponding path program 5 times [2022-11-26 01:00:26,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:26,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79756515] [2022-11-26 01:00:26,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:26,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 440 proven. 701 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-26 01:00:29,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79756515] [2022-11-26 01:00:29,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79756515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:29,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786737804] [2022-11-26 01:00:29,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:00:29,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:29,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:29,414 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:29,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-26 01:00:29,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-26 01:00:29,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:29,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-26 01:00:29,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 432 proven. 525 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2022-11-26 01:00:30,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 585 proven. 468 refuted. 0 times theorem prover too weak. 1749 trivial. 0 not checked. [2022-11-26 01:00:38,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786737804] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:38,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177685683] [2022-11-26 01:00:38,146 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:38,146 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:38,146 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:38,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:38,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 37] total 68 [2022-11-26 01:00:38,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581041768] [2022-11-26 01:00:38,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:38,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-26 01:00:38,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:38,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-26 01:00:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4133, Unknown=0, NotChecked=0, Total=4692 [2022-11-26 01:00:38,151 INFO L87 Difference]: Start difference. First operand 520 states and 586 transitions. Second operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-26 01:00:38,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:38,576 INFO L93 Difference]: Finished difference Result 541 states and 608 transitions. [2022-11-26 01:00:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-26 01:00:38,576 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) Word has length 403 [2022-11-26 01:00:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:38,579 INFO L225 Difference]: With dead ends: 541 [2022-11-26 01:00:38,580 INFO L226 Difference]: Without dead ends: 486 [2022-11-26 01:00:38,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 767 SyntacticMatches, 51 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5567 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=658, Invalid=4744, Unknown=0, NotChecked=0, Total=5402 [2022-11-26 01:00:38,582 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 18 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:38,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 829 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:00:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-26 01:00:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 461. [2022-11-26 01:00:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 368 states have (on average 1.0271739130434783) internal successors, (378), 364 states have internal predecessors, (378), 55 states have call successors, (55), 37 states have call predecessors, (55), 37 states have return successors, (82), 59 states have call predecessors, (82), 54 states have call successors, (82) [2022-11-26 01:00:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 515 transitions. [2022-11-26 01:00:38,613 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 515 transitions. Word has length 403 [2022-11-26 01:00:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:38,614 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 515 transitions. [2022-11-26 01:00:38,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-26 01:00:38,614 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 515 transitions. [2022-11-26 01:00:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 594 [2022-11-26 01:00:38,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:38,620 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 25, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 9, 7, 5, 1, 1, 1] [2022-11-26 01:00:38,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:38,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-26 01:00:38,832 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:38,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1088756636, now seen corresponding path program 5 times [2022-11-26 01:00:38,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:38,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193441040] [2022-11-26 01:00:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:38,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 643 proven. 175 refuted. 0 times theorem prover too weak. 5398 trivial. 0 not checked. [2022-11-26 01:00:39,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193441040] [2022-11-26 01:00:39,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193441040] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:39,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92875338] [2022-11-26 01:00:39,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 01:00:39,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:39,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:39,388 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:39,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-26 01:00:39,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-26 01:00:39,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:39,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 01:00:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 2016 proven. 44 refuted. 0 times theorem prover too weak. 4156 trivial. 0 not checked. [2022-11-26 01:00:40,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:00:41,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 1125 proven. 138 refuted. 0 times theorem prover too weak. 4953 trivial. 0 not checked. [2022-11-26 01:00:41,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92875338] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:00:41,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [857877599] [2022-11-26 01:00:41,385 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:00:41,386 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:00:41,386 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:00:41,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:00:41,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 13] total 23 [2022-11-26 01:00:41,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402868687] [2022-11-26 01:00:41,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:00:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-26 01:00:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:00:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-26 01:00:41,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2022-11-26 01:00:41,392 INFO L87 Difference]: Start difference. First operand 461 states and 515 transitions. Second operand has 23 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 14 states have call successors, (27), 3 states have call predecessors, (27), 10 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-26 01:00:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:00:42,144 INFO L93 Difference]: Finished difference Result 874 states and 996 transitions. [2022-11-26 01:00:42,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-26 01:00:42,145 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 14 states have call successors, (27), 3 states have call predecessors, (27), 10 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 593 [2022-11-26 01:00:42,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:00:42,148 INFO L225 Difference]: With dead ends: 874 [2022-11-26 01:00:42,149 INFO L226 Difference]: Without dead ends: 437 [2022-11-26 01:00:42,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1169 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2022-11-26 01:00:42,151 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 173 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 01:00:42,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 289 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 01:00:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-26 01:00:42,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 411. [2022-11-26 01:00:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 329 states have (on average 1.0243161094224924) internal successors, (337), 325 states have internal predecessors, (337), 50 states have call successors, (50), 36 states have call predecessors, (50), 31 states have return successors, (58), 49 states have call predecessors, (58), 49 states have call successors, (58) [2022-11-26 01:00:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 445 transitions. [2022-11-26 01:00:42,178 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 445 transitions. Word has length 593 [2022-11-26 01:00:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:00:42,179 INFO L495 AbstractCegarLoop]: Abstraction has 411 states and 445 transitions. [2022-11-26 01:00:42,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 7.0) internal successors, (154), 22 states have internal predecessors, (154), 14 states have call successors, (27), 3 states have call predecessors, (27), 10 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2022-11-26 01:00:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 445 transitions. [2022-11-26 01:00:42,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2022-11-26 01:00:42,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 01:00:42,185 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 32, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1] [2022-11-26 01:00:42,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-26 01:00:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-26 01:00:42,392 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-26 01:00:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 01:00:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash -269713044, now seen corresponding path program 6 times [2022-11-26 01:00:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 01:00:42,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266609901] [2022-11-26 01:00:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 01:00:42,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 01:00:42,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 01:00:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1257 proven. 1900 refuted. 0 times theorem prover too weak. 4397 trivial. 0 not checked. [2022-11-26 01:00:49,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 01:00:49,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266609901] [2022-11-26 01:00:49,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266609901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 01:00:49,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159538925] [2022-11-26 01:00:49,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 01:00:49,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:00:49,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 01:00:49,762 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 01:00:49,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-26 01:00:50,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 01:00:50,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 01:00:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-26 01:00:50,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 01:00:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1237 proven. 1440 refuted. 0 times theorem prover too weak. 4877 trivial. 0 not checked. [2022-11-26 01:00:51,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 01:01:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1543 proven. 1316 refuted. 0 times theorem prover too weak. 4695 trivial. 0 not checked. [2022-11-26 01:01:10,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159538925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 01:01:10,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419156894] [2022-11-26 01:01:10,181 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-26 01:01:10,181 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 01:01:10,181 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) 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) [2022-11-26 01:01:10,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 01:01:10,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36, 46] total 79 [2022-11-26 01:01:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001013747] [2022-11-26 01:01:10,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 01:01:10,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-26 01:01:10,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 01:01:10,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-26 01:01:10,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=5582, Unknown=0, NotChecked=0, Total=6320 [2022-11-26 01:01:10,187 INFO L87 Difference]: Start difference. First operand 411 states and 445 transitions. Second operand has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-26 01:01:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 01:01:10,603 INFO L93 Difference]: Finished difference Result 434 states and 469 transitions. [2022-11-26 01:01:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-26 01:01:10,603 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) Word has length 652 [2022-11-26 01:01:10,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 01:01:10,605 INFO L225 Difference]: With dead ends: 434 [2022-11-26 01:01:10,605 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 01:01:10,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1265 SyntacticMatches, 92 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9764 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=859, Invalid=6281, Unknown=0, NotChecked=0, Total=7140 [2022-11-26 01:01:10,609 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 01:01:10,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 682 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 01:01:10,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 01:01:10,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 01:01:10,610 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) [2022-11-26 01:01:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 01:01:10,610 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 652 [2022-11-26 01:01:10,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 01:01:10,611 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 01:01:10,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-26 01:01:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 01:01:10,612 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 01:01:10,614 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2022-11-26 01:01:10,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2022-11-26 01:01:10,615 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2022-11-26 01:01:10,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2022-11-26 01:01:10,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2022-11-26 01:01:10,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2022-11-26 01:01:10,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2022-11-26 01:01:10,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2022-11-26 01:01:10,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2022-11-26 01:01:10,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2022-11-26 01:01:10,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2022-11-26 01:01:10,617 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2022-11-26 01:01:10,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-26 01:01:10,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 01:01:10,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 01:01:25,633 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 01:01:25,633 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 01:01:25,633 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 8 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 8)) [2022-11-26 01:01:25,633 INFO L902 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: true [2022-11-26 01:01:25,633 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-11-26 01:01:25,633 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (not (<= |fibo2_#in~n| 1)) (or (and (<= |fibo2_#in~n| fibo2_~n) (<= fibo2_~n |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 7)))) [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,634 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,639 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (let ((.cse4 (<= |fibo2_#in~n| 3)) (.cse1 (<= |fibo2_#in~n| fibo2_~n)) (.cse2 (<= fibo2_~n |fibo2_#in~n|))) (let ((.cse0 (not (<= |fibo2_#in~n| 7))) (.cse3 (and .cse4 (= |fibo2_#t~ret6| 1) .cse1 (< 1 fibo2_~n) .cse2))) (and (or .cse0 (<= 8 |fibo2_#t~ret6|) (not (<= 7 |fibo2_#in~n|))) (or (and .cse1 (<= |fibo2_#t~ret6| 2) .cse2 (<= 2 |fibo2_#t~ret6|)) (not (<= |fibo2_#in~n| 5)) .cse3 (and (<= |fibo2_#t~ret6| 3) (<= 5 fibo2_~n) .cse2)) (or .cse0 (not (<= 5 |fibo2_#in~n|)) (and (<= 3 |fibo2_#t~ret6|) (<= |fibo2_#t~ret6| 8) .cse1 .cse2)) (or .cse3 (not .cse4))))) [2022-11-26 01:01:25,639 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,639 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,639 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,639 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-11-26 01:01:25,640 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-11-26 01:01:25,641 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-26 01:01:25,641 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,641 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,641 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,641 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,642 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (and (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)))) (and (not (<= |fibo1_#in~n| 4)) (or .cse0 (not (<= |fibo1_#in~n| 6))) (or .cse0 (not (<= |fibo1_#in~n| 8)) (not (<= 8 |fibo1_#in~n|))))) [2022-11-26 01:01:25,647 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,647 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,647 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,647 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-11-26 01:01:25,648 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,648 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse1 (<= 5 |fibo1_#t~ret4|)) (.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse3 (<= 6 |fibo1_#in~n|)) (.cse2 (<= |fibo1_#in~n| fibo1_~n)) (.cse4 (not (<= |fibo1_#in~n| 6)))) (and (not (<= |fibo1_#in~n| 4)) (or (not (<= |fibo1_#in~n| 8)) (not (<= 8 |fibo1_#in~n|)) (and .cse0 .cse1 .cse2 (<= |fibo1_#t~ret4| 13))) (or .cse1 (not .cse3) .cse4) (or (and .cse0 (<= 3 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 3) .cse2) (and .cse0 (<= |fibo1_#t~ret4| 5) .cse3 .cse2) .cse4))) [2022-11-26 01:01:25,648 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,649 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,649 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,649 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,649 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-11-26 01:01:25,649 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,650 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-26 01:01:25,650 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-11-26 01:01:25,651 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-11-26 01:01:25,651 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-11-26 01:01:25,655 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 01:01:25,661 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 01:01:25,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 01:01:25 BoogieIcfgContainer [2022-11-26 01:01:25,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 01:01:25,681 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 01:01:25,681 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 01:01:25,681 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 01:01:25,682 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:59:04" (3/4) ... [2022-11-26 01:01:25,685 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 01:01:25,691 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-11-26 01:01:25,691 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-11-26 01:01:25,699 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-26 01:01:25,699 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-26 01:01:25,699 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 01:01:25,699 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 01:01:25,744 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 01:01:25,744 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 01:01:25,745 INFO L158 Benchmark]: Toolchain (without parser) took 142447.71ms. Allocated memory was 184.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 148.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 124.9MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,749 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 130.0MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 01:01:25,749 INFO L158 Benchmark]: CACSL2BoogieTranslator took 386.83ms. Allocated memory is still 184.5MB. Free memory was 148.3MB in the beginning and 151.4MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,749 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.46ms. Allocated memory is still 184.5MB. Free memory was 151.4MB in the beginning and 150.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,749 INFO L158 Benchmark]: Boogie Preprocessor took 21.00ms. Allocated memory is still 184.5MB. Free memory was 150.0MB in the beginning and 148.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,750 INFO L158 Benchmark]: RCFGBuilder took 493.04ms. Allocated memory is still 184.5MB. Free memory was 148.6MB in the beginning and 136.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,751 INFO L158 Benchmark]: TraceAbstraction took 141433.07ms. Allocated memory was 184.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 135.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 848.0MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,752 INFO L158 Benchmark]: Witness Printer took 63.56ms. Allocated memory is still 1.4GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 01:01:25,761 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 130.0MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 386.83ms. Allocated memory is still 184.5MB. Free memory was 148.3MB in the beginning and 151.4MB in the end (delta: -3.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.46ms. Allocated memory is still 184.5MB. Free memory was 151.4MB in the beginning and 150.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.00ms. Allocated memory is still 184.5MB. Free memory was 150.0MB in the beginning and 148.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 493.04ms. Allocated memory is still 184.5MB. Free memory was 148.6MB in the beginning and 136.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 141433.07ms. Allocated memory was 184.5MB in the beginning and 1.4GB in the end (delta: 1.2GB). Free memory was 135.3MB in the beginning and 1.2GB in the end (delta: -1.1GB). Peak memory consumption was 848.0MB. Max. memory is 16.1GB. * Witness Printer took 63.56ms. Allocated memory is still 1.4GB. Free memory was 1.2GB in the beginning and 1.2GB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. 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: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: 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 3 procedures, 46 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 141.3s, OverallIterations: 43, TraceHistogramMax: 34, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.2s, AutomataDifference: 29.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 14.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6038 SdHoareTripleChecker+Valid, 16.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5898 mSDsluCounter, 15278 SdHoareTripleChecker+Invalid, 13.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13485 mSDsCounter, 2757 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24932 IncrementalHoareTripleChecker+Invalid, 27689 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2757 mSolverCounterUnsat, 1793 mSDtfsCounter, 24932 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14045 GetRequests, 12311 SyntacticMatches, 379 SemanticMatches, 1355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34734 ImplicationChecksByTransitivity, 25.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1019occurred in iteration=28, InterpolantAutomatonStates: 927, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 43 MinimizatonAttempts, 2407 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 3251 PreInvPairs, 5227 NumberOfFragments, 230 HoareAnnotationTreeSize, 3251 FomulaSimplifications, 185535 FormulaSimplificationTreeSizeReduction, 11.9s HoareSimplificationTime, 8 FomulaSimplificationsInter, 58734 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 82.1s InterpolantComputationTime, 13448 NumberOfCodeBlocks, 11601 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 19552 ConstructedInterpolants, 0 QuantifiedInterpolants, 35820 SizeOfPredicates, 116 NumberOfNonLiveVariables, 9577 ConjunctsInSsa, 662 ConjunctsInUnsatCore, 103 InterpolantComputations, 16 PerfectInterpolantSequences, 100042/116039 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 12 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-26 01:01:25,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9792381-1055-4992-aa30-4dfcc5834849/bin/utaipan-ByfvJB40ur/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