./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b 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_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS --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 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 --- 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-8393723 [2022-11-19 07:01:03,461 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:01:03,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:01:03,483 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:01:03,484 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:01:03,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:01:03,486 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:01:03,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:01:03,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:01:03,491 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:01:03,492 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:01:03,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:01:03,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:01:03,495 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:01:03,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:01:03,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:01:03,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:01:03,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:01:03,502 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:01:03,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:01:03,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:01:03,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:01:03,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:01:03,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:01:03,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:01:03,515 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:01:03,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:01:03,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:01:03,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:01:03,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:01:03,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:01:03,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:01:03,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:01:03,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:01:03,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:01:03,524 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:01:03,525 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:01:03,525 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:01:03,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:01:03,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:01:03,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:01:03,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-19 07:01:03,551 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:01:03,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:01:03,552 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:01:03,552 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:01:03,553 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:01:03,553 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:01:03,554 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:01:03,554 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:01:03,554 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:01:03,555 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:01:03,555 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:01:03,556 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:01:03,556 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:01:03,556 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:01:03,557 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:01:03,557 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:01:03,557 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:01:03,558 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:01:03,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:01:03,559 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:01:03,559 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:01:03,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:01:03,560 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:01:03,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:01:03,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:01:03,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:01:03,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:01:03,562 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 07:01:03,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:01:03,562 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:01:03,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:01:03,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:01:03,563 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:01:03,563 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:01:03,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:01:03,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:01:03,564 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:01:03,564 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:01:03,564 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:01:03,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:01:03,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:01:03,565 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:01:03,565 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:01:03,565 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_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 [2022-11-19 07:01:03,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:01:03,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:01:03,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:01:03,881 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:01:03,882 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:01:03,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2022-11-19 07:01:03,964 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/data/f3067e7a9/6841b5170fb0429683e3143f30d842a5/FLAGea638a1d5 [2022-11-19 07:01:04,462 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:01:04,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2022-11-19 07:01:04,471 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/data/f3067e7a9/6841b5170fb0429683e3143f30d842a5/FLAGea638a1d5 [2022-11-19 07:01:04,856 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/data/f3067e7a9/6841b5170fb0429683e3143f30d842a5 [2022-11-19 07:01:04,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:01:04,864 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:01:04,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:01:04,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:01:04,872 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:01:04,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:04" (1/1) ... [2022-11-19 07:01:04,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51014caa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:04, skipping insertion in model container [2022-11-19 07:01:04,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:01:04" (1/1) ... [2022-11-19 07:01:04,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:01:04,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:01:05,180 WARN L234 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_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-11-19 07:01:05,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:01:05,192 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:01:05,222 WARN L234 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_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-11-19 07:01:05,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:01:05,238 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:01:05,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05 WrapperNode [2022-11-19 07:01:05,239 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:01:05,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:01:05,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:01:05,241 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:01:05,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,277 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-19 07:01:05,278 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:01:05,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:01:05,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:01:05,280 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:01:05,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,311 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,316 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:01:05,323 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:01:05,323 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:01:05,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:01:05,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (1/1) ... [2022-11-19 07:01:05,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:01:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:05,356 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:01:05,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:01:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:01:05,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:01:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-19 07:01:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-19 07:01:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-19 07:01:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-19 07:01:05,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:01:05,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:01:05,479 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:01:05,482 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:01:05,675 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:01:05,720 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:01:05,720 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:01:05,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:05 BoogieIcfgContainer [2022-11-19 07:01:05,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:01:05,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:01:05,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:01:05,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:01:05,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:01:04" (1/3) ... [2022-11-19 07:01:05,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424f47c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:05, skipping insertion in model container [2022-11-19 07:01:05,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:01:05" (2/3) ... [2022-11-19 07:01:05,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@424f47c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:01:05, skipping insertion in model container [2022-11-19 07:01:05,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:05" (3/3) ... [2022-11-19 07:01:05,748 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2022-11-19 07:01:05,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:01:05,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-19 07:01:05,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:01:05,903 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;@5ed594ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:01:05,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-19 07:01:05,907 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) [2022-11-19 07:01:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:01:05,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:05,916 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:01:05,917 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:05,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:05,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1023451622, now seen corresponding path program 1 times [2022-11-19 07:01:05,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838371339] [2022-11-19 07:01:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:05,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:06,292 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:06,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838371339] [2022-11-19 07:01:06,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838371339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:06,293 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:06,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:01:06,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188935254] [2022-11-19 07:01:06,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:06,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:06,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:06,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:06,357 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 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:06,568 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-11-19 07:01:06,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:01:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 07:01:06,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:06,581 INFO L225 Difference]: With dead ends: 69 [2022-11-19 07:01:06,582 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 07:01:06,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:01:06,588 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:06,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 153 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:06,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 07:01:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2022-11-19 07:01:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 47 states have internal predecessors, (55), 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) [2022-11-19 07:01:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2022-11-19 07:01:06,650 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 6 [2022-11-19 07:01:06,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:06,651 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2022-11-19 07:01:06,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2022-11-19 07:01:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:01:06,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:06,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:06,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:01:06,652 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:06,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:06,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1662229125, now seen corresponding path program 1 times [2022-11-19 07:01:06,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:06,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277883253] [2022-11-19 07:01:06,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:06,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:06,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:06,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:06,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277883253] [2022-11-19 07:01:06,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277883253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:06,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:06,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835188189] [2022-11-19 07:01:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:06,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:06,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:06,699 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:06,731 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-11-19 07:01:06,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:06,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:01:06,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:06,733 INFO L225 Difference]: With dead ends: 59 [2022-11-19 07:01:06,733 INFO L226 Difference]: Without dead ends: 57 [2022-11-19 07:01:06,733 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 [2022-11-19 07:01:06,735 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 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 [2022-11-19 07:01:06,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-19 07:01:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2022-11-19 07:01:06,745 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) [2022-11-19 07:01:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-19 07:01:06,748 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-11-19 07:01:06,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:06,748 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-19 07:01:06,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:01:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-19 07:01:06,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 07:01:06,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:06,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:06,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:01:06,750 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:06,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:06,751 INFO L85 PathProgramCache]: Analyzing trace with hash -942893292, now seen corresponding path program 1 times [2022-11-19 07:01:06,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:06,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343279678] [2022-11-19 07:01:06,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:06,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:06,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:06,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343279678] [2022-11-19 07:01:06,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343279678] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:06,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:06,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:01:06,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469989729] [2022-11-19 07:01:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:06,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:06,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:01:06,862 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-19 07:01:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:07,033 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-19 07:01:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:01:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2022-11-19 07:01:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:07,035 INFO L225 Difference]: With dead ends: 55 [2022-11-19 07:01:07,035 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:01:07,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:07,037 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:07,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 61 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:01:07,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-19 07:01:07,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 41 states have internal predecessors, (47), 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) [2022-11-19 07:01:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-19 07:01:07,062 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 12 [2022-11-19 07:01:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:07,062 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-19 07:01:07,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-19 07:01:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-19 07:01:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:01:07,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:07,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:07,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:01:07,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash 835079079, now seen corresponding path program 1 times [2022-11-19 07:01:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:07,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686448988] [2022-11-19 07:01:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:07,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686448988] [2022-11-19 07:01:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686448988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:07,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:07,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:01:07,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714694561] [2022-11-19 07:01:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:07,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:01:07,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:01:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:01:07,135 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-19 07:01:07,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:07,163 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-11-19 07:01:07,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:01:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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 13 [2022-11-19 07:01:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:07,165 INFO L225 Difference]: With dead ends: 53 [2022-11-19 07:01:07,166 INFO L226 Difference]: Without dead ends: 51 [2022-11-19 07:01:07,166 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 [2022-11-19 07:01:07,168 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:07,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 62 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-19 07:01:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-11-19 07:01:07,178 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) [2022-11-19 07:01:07,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-19 07:01:07,181 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2022-11-19 07:01:07,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:07,182 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-19 07:01:07,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-19 07:01:07,182 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-19 07:01:07,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:01:07,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:07,184 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:07,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:01:07,185 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash 21328462, now seen corresponding path program 1 times [2022-11-19 07:01:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:07,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132480673] [2022-11-19 07:01:07,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:07,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:01:07,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:07,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132480673] [2022-11-19 07:01:07,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132480673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:07,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:07,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:07,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700710004] [2022-11-19 07:01:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:07,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:07,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:07,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:07,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:07,331 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) [2022-11-19 07:01:07,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:07,385 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-11-19 07:01:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:07,386 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 [2022-11-19 07:01:07,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:07,388 INFO L225 Difference]: With dead ends: 75 [2022-11-19 07:01:07,388 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 07:01:07,389 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 [2022-11-19 07:01:07,390 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 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 [2022-11-19 07:01:07,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 07:01:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-11-19 07:01:07,402 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) [2022-11-19 07:01:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-11-19 07:01:07,405 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2022-11-19 07:01:07,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:07,405 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-11-19 07:01:07,405 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) [2022-11-19 07:01:07,406 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-11-19 07:01:07,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:01:07,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:07,407 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] [2022-11-19 07:01:07,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:01:07,411 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:07,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:07,411 INFO L85 PathProgramCache]: Analyzing trace with hash 672130067, now seen corresponding path program 1 times [2022-11-19 07:01:07,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:07,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111359190] [2022-11-19 07:01:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:07,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:07,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:01:07,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:07,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111359190] [2022-11-19 07:01:07,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111359190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337439802] [2022-11-19 07:01:07,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:07,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:07,619 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:07,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:01:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:01:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:07,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:07,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337439802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:07,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:07,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-19 07:01:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569742235] [2022-11-19 07:01:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:07,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:07,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:07,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:07,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:01:07,828 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) [2022-11-19 07:01:07,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:07,980 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-11-19 07:01:07,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:01:07,981 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 [2022-11-19 07:01:07,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:07,982 INFO L225 Difference]: With dead ends: 110 [2022-11-19 07:01:07,982 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 07:01:07,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:01:07,985 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 [2022-11-19 07:01:07,985 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] [2022-11-19 07:01:07,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 07:01:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-19 07:01:07,994 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) [2022-11-19 07:01:07,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-19 07:01:07,996 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2022-11-19 07:01:07,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:07,997 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-19 07:01:07,997 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) [2022-11-19 07:01:07,997 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-19 07:01:07,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 07:01:07,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:07,999 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] [2022-11-19 07:01:08,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:01:08,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:08,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1599491552, now seen corresponding path program 1 times [2022-11-19 07:01:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:08,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904599500] [2022-11-19 07:01:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:01:08,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:08,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904599500] [2022-11-19 07:01:08,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904599500] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:08,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:08,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:08,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306400885] [2022-11-19 07:01:08,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:08,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:08,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:08,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:08,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:08,354 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) [2022-11-19 07:01:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:08,411 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-19 07:01:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:08,412 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 [2022-11-19 07:01:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:08,415 INFO L225 Difference]: With dead ends: 84 [2022-11-19 07:01:08,416 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 07:01:08,420 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 [2022-11-19 07:01:08,424 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:08,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:08,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 07:01:08,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-11-19 07:01:08,446 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) [2022-11-19 07:01:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-11-19 07:01:08,448 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-11-19 07:01:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:08,448 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-11-19 07:01:08,449 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) [2022-11-19 07:01:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-11-19 07:01:08,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:01:08,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:08,451 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] [2022-11-19 07:01:08,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:01:08,451 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:08,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:08,452 INFO L85 PathProgramCache]: Analyzing trace with hash -141800136, now seen corresponding path program 1 times [2022-11-19 07:01:08,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:08,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564932542] [2022-11-19 07:01:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:08,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 07:01:08,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:08,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564932542] [2022-11-19 07:01:08,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564932542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:08,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:08,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435725333] [2022-11-19 07:01:08,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:08,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:08,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:08,594 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) [2022-11-19 07:01:08,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:08,661 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-19 07:01:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:08,662 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 [2022-11-19 07:01:08,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:08,665 INFO L225 Difference]: With dead ends: 84 [2022-11-19 07:01:08,665 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 07:01:08,667 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 [2022-11-19 07:01:08,672 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 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 [2022-11-19 07:01:08,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:08,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 07:01:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-19 07:01:08,689 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) [2022-11-19 07:01:08,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-19 07:01:08,698 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2022-11-19 07:01:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:08,701 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-19 07:01:08,702 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) [2022-11-19 07:01:08,702 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-19 07:01:08,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:01:08,706 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:08,707 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 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, 1, 1, 1, 1] [2022-11-19 07:01:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:01:08,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1341431843, now seen corresponding path program 1 times [2022-11-19 07:01:08,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:08,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190332430] [2022-11-19 07:01:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:01:08,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:08,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190332430] [2022-11-19 07:01:08,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190332430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313996072] [2022-11-19 07:01:08,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:08,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:08,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:08,891 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:08,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:01:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:08,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:01:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:01:09,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:09,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313996072] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:09,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:09,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-19 07:01:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827769969] [2022-11-19 07:01:09,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:09,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:09,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:09,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:01:09,105 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:01:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:09,258 INFO L93 Difference]: Finished difference Result 140 states and 179 transitions. [2022-11-19 07:01:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:01:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-11-19 07:01:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:09,260 INFO L225 Difference]: With dead ends: 140 [2022-11-19 07:01:09,260 INFO L226 Difference]: Without dead ends: 75 [2022-11-19 07:01:09,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:01:09,262 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:09,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 141 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:09,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-19 07:01:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-11-19 07:01:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 58 states have internal predecessors, (63), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (20), 11 states have call predecessors, (20), 9 states have call successors, (20) [2022-11-19 07:01:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-19 07:01:09,276 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 38 [2022-11-19 07:01:09,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:09,277 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-19 07:01:09,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:01:09,277 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-19 07:01:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:01:09,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:09,279 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] [2022-11-19 07:01:09,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:09,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:09,485 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -88974329, now seen corresponding path program 1 times [2022-11-19 07:01:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:09,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341033364] [2022-11-19 07:01:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:09,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:09,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:01:09,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341033364] [2022-11-19 07:01:09,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341033364] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:09,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320136821] [2022-11-19 07:01:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:09,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:09,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:09,589 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:09,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:01:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:09,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:09,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:09,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:01:09,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320136821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593436375] [2022-11-19 07:01:09,974 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 07:01:09,974 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:09,979 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:336) 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) [2022-11-19 07:01:09,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:09,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-19 07:01:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434088571] [2022-11-19 07:01:09,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:09,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:01:09,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:09,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:01:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:01:09,997 INFO L87 Difference]: Start difference. First operand 73 states and 93 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) [2022-11-19 07:01:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:10,665 INFO L93 Difference]: Finished difference Result 201 states and 266 transitions. [2022-11-19 07:01:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:01:10,666 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 [2022-11-19 07:01:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:10,668 INFO L225 Difference]: With dead ends: 201 [2022-11-19 07:01:10,668 INFO L226 Difference]: Without dead ends: 136 [2022-11-19 07:01:10,669 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 [2022-11-19 07:01:10,670 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 128 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:10,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 515 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:01:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-19 07:01:10,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2022-11-19 07:01:10,685 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) [2022-11-19 07:01:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-19 07:01:10,687 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 29 [2022-11-19 07:01:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:10,687 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-19 07:01:10,688 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) [2022-11-19 07:01:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-19 07:01:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:01:10,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:10,689 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] [2022-11-19 07:01:10,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:10,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:01:10,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:10,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1080973755, now seen corresponding path program 2 times [2022-11-19 07:01:10,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:10,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122294861] [2022-11-19 07:01:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:10,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:01:11,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122294861] [2022-11-19 07:01:11,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122294861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:11,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949529386] [2022-11-19 07:01:11,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:11,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:11,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:11,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:11,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:01:11,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:01:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:01:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:01:11,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:11,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949529386] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:11,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:11,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-19 07:01:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044193438] [2022-11-19 07:01:11,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:11,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:11,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:11,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:11,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:11,114 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) [2022-11-19 07:01:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:11,160 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2022-11-19 07:01:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:11,161 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 [2022-11-19 07:01:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:11,164 INFO L225 Difference]: With dead ends: 131 [2022-11-19 07:01:11,164 INFO L226 Difference]: Without dead ends: 130 [2022-11-19 07:01:11,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:11,165 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:11,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:11,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-19 07:01:11,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2022-11-19 07:01:11,197 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) [2022-11-19 07:01:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-11-19 07:01:11,202 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 41 [2022-11-19 07:01:11,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:11,202 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-11-19 07:01:11,202 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) [2022-11-19 07:01:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-11-19 07:01:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:01:11,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:11,212 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] [2022-11-19 07:01:11,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:11,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:01:11,413 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:11,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:11,413 INFO L85 PathProgramCache]: Analyzing trace with hash -849551892, now seen corresponding path program 1 times [2022-11-19 07:01:11,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:11,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490596437] [2022-11-19 07:01:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:11,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-19 07:01:11,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:11,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490596437] [2022-11-19 07:01:11,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490596437] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:11,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761983286] [2022-11-19 07:01:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:11,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:11,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:11,542 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:11,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:01:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:11,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:01:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:11,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:01:12,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761983286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:12,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [233805013] [2022-11-19 07:01:12,097 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 07:01:12,097 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:12,098 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:336) 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) [2022-11-19 07:01:12,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:12,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 23 [2022-11-19 07:01:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533486796] [2022-11-19 07:01:12,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:12,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-19 07:01:12,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:12,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-19 07:01:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-19 07:01:12,101 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) [2022-11-19 07:01:13,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:13,008 INFO L93 Difference]: Finished difference Result 320 states and 420 transitions. [2022-11-19 07:01:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:01:13,011 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 [2022-11-19 07:01:13,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:13,013 INFO L225 Difference]: With dead ends: 320 [2022-11-19 07:01:13,013 INFO L226 Difference]: Without dead ends: 210 [2022-11-19 07:01:13,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:01:13,015 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 170 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:13,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 940 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:01:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-11-19 07:01:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 190. [2022-11-19 07:01:13,038 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) [2022-11-19 07:01:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2022-11-19 07:01:13,040 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 42 [2022-11-19 07:01:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:13,041 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2022-11-19 07:01:13,041 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) [2022-11-19 07:01:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2022-11-19 07:01:13,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:01:13,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:13,043 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] [2022-11-19 07:01:13,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:13,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1587514251, now seen corresponding path program 1 times [2022-11-19 07:01:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:13,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997798920] [2022-11-19 07:01:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:13,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997798920] [2022-11-19 07:01:13,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997798920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:13,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125796161] [2022-11-19 07:01:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:13,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:13,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:13,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:13,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:01:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:13,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:01:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:13,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:01:14,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125796161] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:14,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422042750] [2022-11-19 07:01:14,119 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 07:01:14,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:14,120 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:336) 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) [2022-11-19 07:01:14,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:14,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 19, 19] total 24 [2022-11-19 07:01:14,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094813752] [2022-11-19 07:01:14,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:14,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:01:14,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:14,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:01:14,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:01:14,122 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) [2022-11-19 07:01:15,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:15,007 INFO L93 Difference]: Finished difference Result 407 states and 524 transitions. [2022-11-19 07:01:15,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:01:15,008 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 [2022-11-19 07:01:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:15,009 INFO L225 Difference]: With dead ends: 407 [2022-11-19 07:01:15,010 INFO L226 Difference]: Without dead ends: 237 [2022-11-19 07:01:15,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:01:15,012 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 211 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:15,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 847 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:01:15,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-19 07:01:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 212. [2022-11-19 07:01:15,026 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) [2022-11-19 07:01:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-11-19 07:01:15,029 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 59 [2022-11-19 07:01:15,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:15,030 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-11-19 07:01:15,030 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) [2022-11-19 07:01:15,030 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-11-19 07:01:15,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-19 07:01:15,031 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:15,031 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] [2022-11-19 07:01:15,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 07:01:15,237 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1792758973, now seen corresponding path program 2 times [2022-11-19 07:01:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:15,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633554541] [2022-11-19 07:01:15,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:15,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:15,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633554541] [2022-11-19 07:01:15,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633554541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:15,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952275690] [2022-11-19 07:01:15,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:15,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:15,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:15,356 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:15,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:01:15,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:01:15,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:15,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:01:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:15,466 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:15,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952275690] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:15,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:15,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-19 07:01:15,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564290142] [2022-11-19 07:01:15,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:15,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:15,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:15,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:15,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:15,469 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) [2022-11-19 07:01:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:15,510 INFO L93 Difference]: Finished difference Result 223 states and 286 transitions. [2022-11-19 07:01:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:15,511 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 [2022-11-19 07:01:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:15,513 INFO L225 Difference]: With dead ends: 223 [2022-11-19 07:01:15,513 INFO L226 Difference]: Without dead ends: 222 [2022-11-19 07:01:15,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:01:15,515 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 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 [2022-11-19 07:01:15,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:15,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-19 07:01:15,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 216. [2022-11-19 07:01:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 170 states have (on average 1.1470588235294117) internal successors, (195), 169 states have internal predecessors, (195), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (54), 35 states have call predecessors, (54), 27 states have call successors, (54) [2022-11-19 07:01:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 277 transitions. [2022-11-19 07:01:15,538 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 277 transitions. Word has length 59 [2022-11-19 07:01:15,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:15,539 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 277 transitions. [2022-11-19 07:01:15,540 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) [2022-11-19 07:01:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 277 transitions. [2022-11-19 07:01:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:01:15,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:15,541 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] [2022-11-19 07:01:15,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:15,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:01:15,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash 259046782, now seen corresponding path program 1 times [2022-11-19 07:01:15,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:15,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173895425] [2022-11-19 07:01:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:15,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:15,887 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:15,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173895425] [2022-11-19 07:01:15,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173895425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:15,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246053040] [2022-11-19 07:01:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:15,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:15,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:15,890 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:15,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:01:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:15,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:01:15,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:16,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-19 07:01:16,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246053040] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:16,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2127533986] [2022-11-19 07:01:16,060 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 07:01:16,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:16,061 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:336) 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) [2022-11-19 07:01:16,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:16,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2022-11-19 07:01:16,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632029741] [2022-11-19 07:01:16,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:16,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:01:16,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:16,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:01:16,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:01:16,064 INFO L87 Difference]: Start difference. First operand 216 states and 277 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:01:16,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:16,167 INFO L93 Difference]: Finished difference Result 237 states and 303 transitions. [2022-11-19 07:01:16,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:01:16,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 60 [2022-11-19 07:01:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:16,169 INFO L225 Difference]: With dead ends: 237 [2022-11-19 07:01:16,169 INFO L226 Difference]: Without dead ends: 236 [2022-11-19 07:01:16,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-11-19 07:01:16,173 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:16,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 189 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-11-19 07:01:16,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 216. [2022-11-19 07:01:16,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 171 states have (on average 1.1578947368421053) internal successors, (198), 168 states have internal predecessors, (198), 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) [2022-11-19 07:01:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 276 transitions. [2022-11-19 07:01:16,195 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 276 transitions. Word has length 60 [2022-11-19 07:01:16,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:16,195 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 276 transitions. [2022-11-19 07:01:16,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 12 states have internal predecessors, (39), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:01:16,196 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 276 transitions. [2022-11-19 07:01:16,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:01:16,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:16,197 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] [2022-11-19 07:01:16,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:16,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:01:16,404 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:16,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1837864056, now seen corresponding path program 1 times [2022-11-19 07:01:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:16,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40656951] [2022-11-19 07:01:16,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-19 07:01:16,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40656951] [2022-11-19 07:01:16,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40656951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:16,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:16,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853727577] [2022-11-19 07:01:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:16,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:16,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:16,482 INFO L87 Difference]: Start difference. First operand 216 states and 276 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) [2022-11-19 07:01:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:16,530 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2022-11-19 07:01:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:16,532 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 66 [2022-11-19 07:01:16,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:16,536 INFO L225 Difference]: With dead ends: 229 [2022-11-19 07:01:16,537 INFO L226 Difference]: Without dead ends: 227 [2022-11-19 07:01:16,537 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 [2022-11-19 07:01:16,538 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:16,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 165 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-19 07:01:16,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 212. [2022-11-19 07:01:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 165 states have internal predecessors, (195), 26 states have call successors, (26), 11 states have call predecessors, (26), 14 states have return successors, (48), 35 states have call predecessors, (48), 25 states have call successors, (48) [2022-11-19 07:01:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 269 transitions. [2022-11-19 07:01:16,554 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 269 transitions. Word has length 66 [2022-11-19 07:01:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:16,554 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 269 transitions. [2022-11-19 07:01:16,554 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) [2022-11-19 07:01:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 269 transitions. [2022-11-19 07:01:16,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-19 07:01:16,555 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:16,556 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:01:16,556 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:16,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -967283150, now seen corresponding path program 1 times [2022-11-19 07:01:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:16,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835182578] [2022-11-19 07:01:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:16,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:16,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:01:16,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:16,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835182578] [2022-11-19 07:01:16,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835182578] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479559326] [2022-11-19 07:01:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:16,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:16,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:01:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:16,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:01:16,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:01:17,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:01:17,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479559326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:17,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1173626162] [2022-11-19 07:01:17,374 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-19 07:01:17,374 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:17,374 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:336) 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) [2022-11-19 07:01:17,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:17,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2022-11-19 07:01:17,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695468363] [2022-11-19 07:01:17,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:17,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:01:17,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:17,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:01:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:01:17,379 INFO L87 Difference]: Start difference. First operand 212 states and 269 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 13 states have internal predecessors, (64), 9 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:01:17,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:17,971 INFO L93 Difference]: Finished difference Result 562 states and 756 transitions. [2022-11-19 07:01:17,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:01:17,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 13 states have internal predecessors, (64), 9 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 79 [2022-11-19 07:01:17,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:17,974 INFO L225 Difference]: With dead ends: 562 [2022-11-19 07:01:17,974 INFO L226 Difference]: Without dead ends: 370 [2022-11-19 07:01:17,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:01:17,977 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 319 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:17,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 184 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-19 07:01:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 361. [2022-11-19 07:01:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 288 states have (on average 1.1527777777777777) internal successors, (332), 281 states have internal predecessors, (332), 44 states have call successors, (44), 18 states have call predecessors, (44), 25 states have return successors, (83), 61 states have call predecessors, (83), 43 states have call successors, (83) [2022-11-19 07:01:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 459 transitions. [2022-11-19 07:01:18,002 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 459 transitions. Word has length 79 [2022-11-19 07:01:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:18,002 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 459 transitions. [2022-11-19 07:01:18,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 13 states have internal predecessors, (64), 9 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:01:18,003 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 459 transitions. [2022-11-19 07:01:18,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:01:18,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:18,004 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] [2022-11-19 07:01:18,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:18,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1962617586, now seen corresponding path program 1 times [2022-11-19 07:01:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080564699] [2022-11-19 07:01:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:18,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:18,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-19 07:01:18,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:18,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080564699] [2022-11-19 07:01:18,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080564699] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:18,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:18,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:18,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666412827] [2022-11-19 07:01:18,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:18,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:18,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:18,323 INFO L87 Difference]: Start difference. First operand 361 states and 459 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) [2022-11-19 07:01:18,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:18,362 INFO L93 Difference]: Finished difference Result 375 states and 477 transitions. [2022-11-19 07:01:18,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:18,362 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 [2022-11-19 07:01:18,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:18,365 INFO L225 Difference]: With dead ends: 375 [2022-11-19 07:01:18,365 INFO L226 Difference]: Without dead ends: 374 [2022-11-19 07:01:18,366 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 [2022-11-19 07:01:18,367 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:18,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:18,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-11-19 07:01:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 360. [2022-11-19 07:01:18,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 287 states have (on average 1.1533101045296168) internal successors, (331), 282 states have internal predecessors, (331), 44 states have call successors, (44), 18 states have call predecessors, (44), 25 states have return successors, (83), 59 states have call predecessors, (83), 43 states have call successors, (83) [2022-11-19 07:01:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 458 transitions. [2022-11-19 07:01:18,406 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 458 transitions. Word has length 73 [2022-11-19 07:01:18,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:18,406 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 458 transitions. [2022-11-19 07:01:18,406 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) [2022-11-19 07:01:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 458 transitions. [2022-11-19 07:01:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:01:18,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:18,409 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] [2022-11-19 07:01:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 07:01:18,410 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1974480106, now seen corresponding path program 1 times [2022-11-19 07:01:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159328894] [2022-11-19 07:01:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:18,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-19 07:01:18,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:18,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159328894] [2022-11-19 07:01:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159328894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622659544] [2022-11-19 07:01:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:18,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:18,572 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:18,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:01:18,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:18,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:01:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:01:18,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:18,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622659544] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:18,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:18,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-19 07:01:18,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051584822] [2022-11-19 07:01:18,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:18,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:01:18,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:18,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:01:18,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:01:18,742 INFO L87 Difference]: Start difference. First operand 360 states and 458 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-11-19 07:01:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:18,839 INFO L93 Difference]: Finished difference Result 449 states and 591 transitions. [2022-11-19 07:01:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:01:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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 73 [2022-11-19 07:01:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:18,843 INFO L225 Difference]: With dead ends: 449 [2022-11-19 07:01:18,843 INFO L226 Difference]: Without dead ends: 448 [2022-11-19 07:01:18,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:01:18,844 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:18,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 221 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-19 07:01:18,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 404. [2022-11-19 07:01:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 322 states have (on average 1.1366459627329193) internal successors, (366), 314 states have internal predecessors, (366), 49 states have call successors, (49), 18 states have call predecessors, (49), 29 states have return successors, (116), 71 states have call predecessors, (116), 48 states have call successors, (116) [2022-11-19 07:01:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 531 transitions. [2022-11-19 07:01:18,874 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 531 transitions. Word has length 73 [2022-11-19 07:01:18,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:18,874 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 531 transitions. [2022-11-19 07:01:18,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-11-19 07:01:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 531 transitions. [2022-11-19 07:01:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-19 07:01:18,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:18,876 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] [2022-11-19 07:01:18,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:19,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:19,081 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:19,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:19,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1079341213, now seen corresponding path program 1 times [2022-11-19 07:01:19,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:19,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125909309] [2022-11-19 07:01:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:19,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-19 07:01:19,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:19,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125909309] [2022-11-19 07:01:19,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125909309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:19,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:19,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711483064] [2022-11-19 07:01:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:19,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:19,183 INFO L87 Difference]: Start difference. First operand 404 states and 531 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) [2022-11-19 07:01:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:19,228 INFO L93 Difference]: Finished difference Result 439 states and 574 transitions. [2022-11-19 07:01:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:19,228 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 74 [2022-11-19 07:01:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:19,231 INFO L225 Difference]: With dead ends: 439 [2022-11-19 07:01:19,231 INFO L226 Difference]: Without dead ends: 438 [2022-11-19 07:01:19,232 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 [2022-11-19 07:01:19,233 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:19,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-19 07:01:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 406. [2022-11-19 07:01:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 326 states have (on average 1.1503067484662577) internal successors, (375), 313 states have internal predecessors, (375), 47 states have call successors, (47), 18 states have call predecessors, (47), 29 states have return successors, (108), 74 states have call predecessors, (108), 46 states have call successors, (108) [2022-11-19 07:01:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 530 transitions. [2022-11-19 07:01:19,260 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 530 transitions. Word has length 74 [2022-11-19 07:01:19,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:19,261 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 530 transitions. [2022-11-19 07:01:19,261 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) [2022-11-19 07:01:19,261 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 530 transitions. [2022-11-19 07:01:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-19 07:01:19,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:19,263 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:19,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:01:19,263 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:19,264 INFO L85 PathProgramCache]: Analyzing trace with hash 498594705, now seen corresponding path program 2 times [2022-11-19 07:01:19,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:19,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008458250] [2022-11-19 07:01:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:19,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-19 07:01:19,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:19,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008458250] [2022-11-19 07:01:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008458250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:19,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94755729] [2022-11-19 07:01:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:19,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:19,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:19,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:19,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:01:19,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:01:19,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:19,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:19,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:19,504 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:01:19,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:01:19,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94755729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:19,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:01:19,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4] total 10 [2022-11-19 07:01:19,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686485653] [2022-11-19 07:01:19,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:01:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:01:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:01:19,507 INFO L87 Difference]: Start difference. First operand 406 states and 530 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:01:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:19,586 INFO L93 Difference]: Finished difference Result 442 states and 585 transitions. [2022-11-19 07:01:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:01:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 93 [2022-11-19 07:01:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:19,590 INFO L225 Difference]: With dead ends: 442 [2022-11-19 07:01:19,590 INFO L226 Difference]: Without dead ends: 441 [2022-11-19 07:01:19,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:01:19,591 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 13 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 175 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:01:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2022-11-19 07:01:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 407. [2022-11-19 07:01:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.156441717791411) internal successors, (377), 317 states have internal predecessors, (377), 47 states have call successors, (47), 18 states have call predecessors, (47), 30 states have return successors, (107), 71 states have call predecessors, (107), 46 states have call successors, (107) [2022-11-19 07:01:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 531 transitions. [2022-11-19 07:01:19,619 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 531 transitions. Word has length 93 [2022-11-19 07:01:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:19,620 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 531 transitions. [2022-11-19 07:01:19,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 8 states have internal predecessors, (33), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:01:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 531 transitions. [2022-11-19 07:01:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:01:19,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:19,622 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] [2022-11-19 07:01:19,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:19,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 07:01:19,836 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:19,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:19,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1307042925, now seen corresponding path program 1 times [2022-11-19 07:01:19,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:19,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798977310] [2022-11-19 07:01:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:19,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:19,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-19 07:01:19,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:19,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798977310] [2022-11-19 07:01:19,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798977310] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:01:19,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:01:19,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:01:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919465692] [2022-11-19 07:01:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:01:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:01:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:01:19,901 INFO L87 Difference]: Start difference. First operand 407 states and 531 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) [2022-11-19 07:01:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:19,942 INFO L93 Difference]: Finished difference Result 416 states and 542 transitions. [2022-11-19 07:01:19,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:19,942 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 [2022-11-19 07:01:19,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:19,945 INFO L225 Difference]: With dead ends: 416 [2022-11-19 07:01:19,945 INFO L226 Difference]: Without dead ends: 415 [2022-11-19 07:01:19,950 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 [2022-11-19 07:01:19,952 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 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 [2022-11-19 07:01:19,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:01:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-19 07:01:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 407. [2022-11-19 07:01:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.1503067484662577) internal successors, (375), 317 states have internal predecessors, (375), 47 states have call successors, (47), 18 states have call predecessors, (47), 30 states have return successors, (107), 71 states have call predecessors, (107), 46 states have call successors, (107) [2022-11-19 07:01:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 529 transitions. [2022-11-19 07:01:19,995 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 529 transitions. Word has length 78 [2022-11-19 07:01:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:19,995 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 529 transitions. [2022-11-19 07:01:19,995 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) [2022-11-19 07:01:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 529 transitions. [2022-11-19 07:01:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:01:19,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:19,997 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:19,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 07:01:19,998 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:19,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1658609806, now seen corresponding path program 1 times [2022-11-19 07:01:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531134713] [2022-11-19 07:01:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:20,250 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:01:20,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:20,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531134713] [2022-11-19 07:01:20,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531134713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:20,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162539852] [2022-11-19 07:01:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:20,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:20,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:20,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:20,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:01:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:20,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:20,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 33 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:01:20,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 13 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-19 07:01:20,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162539852] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:20,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115982880] [2022-11-19 07:01:20,696 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:20,697 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:20,697 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:336) 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) [2022-11-19 07:01:20,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:20,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-19 07:01:20,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129850275] [2022-11-19 07:01:20,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:20,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:01:20,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:20,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:01:20,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:01:20,700 INFO L87 Difference]: Start difference. First operand 407 states and 529 transitions. Second operand has 19 states, 18 states have (on average 4.277777777777778) internal successors, (77), 14 states have internal predecessors, (77), 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) [2022-11-19 07:01:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:21,206 INFO L93 Difference]: Finished difference Result 787 states and 1034 transitions. [2022-11-19 07:01:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:01:21,207 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.277777777777778) internal successors, (77), 14 states have internal predecessors, (77), 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 86 [2022-11-19 07:01:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:21,210 INFO L225 Difference]: With dead ends: 787 [2022-11-19 07:01:21,210 INFO L226 Difference]: Without dead ends: 445 [2022-11-19 07:01:21,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:01:21,213 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 174 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:21,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 488 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-11-19 07:01:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 407. [2022-11-19 07:01:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 326 states have (on average 1.1503067484662577) internal successors, (375), 317 states have internal predecessors, (375), 47 states have call successors, (47), 18 states have call predecessors, (47), 30 states have return successors, (101), 71 states have call predecessors, (101), 46 states have call successors, (101) [2022-11-19 07:01:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 523 transitions. [2022-11-19 07:01:21,239 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 523 transitions. Word has length 86 [2022-11-19 07:01:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:21,240 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 523 transitions. [2022-11-19 07:01:21,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.277777777777778) internal successors, (77), 14 states have internal predecessors, (77), 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) [2022-11-19 07:01:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 523 transitions. [2022-11-19 07:01:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:01:21,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:21,242 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 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] [2022-11-19 07:01:21,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:21,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:21,448 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:21,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:21,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1698086323, now seen corresponding path program 1 times [2022-11-19 07:01:21,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:21,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318756540] [2022-11-19 07:01:21,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:21,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 56 proven. 93 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:01:21,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318756540] [2022-11-19 07:01:21,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318756540] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205383060] [2022-11-19 07:01:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:21,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:21,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:21,827 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:21,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:01:21,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:01:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:01:22,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 63 proven. 96 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:01:22,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205383060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:22,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1348896382] [2022-11-19 07:01:22,530 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:22,530 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:22,531 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:336) 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) [2022-11-19 07:01:22,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:22,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 24 [2022-11-19 07:01:22,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129648404] [2022-11-19 07:01:22,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:22,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:01:22,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:22,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:01:22,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:01:22,533 INFO L87 Difference]: Start difference. First operand 407 states and 523 transitions. Second operand has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 18 states have internal predecessors, (102), 13 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:01:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:23,368 INFO L93 Difference]: Finished difference Result 772 states and 1034 transitions. [2022-11-19 07:01:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:01:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 18 states have internal predecessors, (102), 13 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 110 [2022-11-19 07:01:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:23,372 INFO L225 Difference]: With dead ends: 772 [2022-11-19 07:01:23,372 INFO L226 Difference]: Without dead ends: 420 [2022-11-19 07:01:23,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 207 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:01:23,376 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 380 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:23,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 190 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-19 07:01:23,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 409. [2022-11-19 07:01:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 326 states have (on average 1.1411042944785277) internal successors, (372), 319 states have internal predecessors, (372), 47 states have call successors, (47), 20 states have call predecessors, (47), 32 states have return successors, (98), 69 states have call predecessors, (98), 46 states have call successors, (98) [2022-11-19 07:01:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 517 transitions. [2022-11-19 07:01:23,402 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 517 transitions. Word has length 110 [2022-11-19 07:01:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 517 transitions. [2022-11-19 07:01:23,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.434782608695652) internal successors, (102), 18 states have internal predecessors, (102), 13 states have call successors, (19), 7 states have call predecessors, (19), 3 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:01:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 517 transitions. [2022-11-19 07:01:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-19 07:01:23,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:23,405 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:23,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:23,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:23,610 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 981936039, now seen corresponding path program 1 times [2022-11-19 07:01:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:23,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909890839] [2022-11-19 07:01:23,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:01:23,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909890839] [2022-11-19 07:01:23,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909890839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:23,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847699788] [2022-11-19 07:01:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:23,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:23,903 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:23,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:01:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:23,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:01:23,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:01:24,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:01:24,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847699788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [903853209] [2022-11-19 07:01:24,351 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:24,351 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:24,352 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:336) 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) [2022-11-19 07:01:24,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:24,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-19 07:01:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286556650] [2022-11-19 07:01:24,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:24,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:01:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:01:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:01:24,361 INFO L87 Difference]: Start difference. First operand 409 states and 517 transitions. Second operand has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-11-19 07:01:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:24,797 INFO L93 Difference]: Finished difference Result 747 states and 947 transitions. [2022-11-19 07:01:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:01:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 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 87 [2022-11-19 07:01:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:24,802 INFO L225 Difference]: With dead ends: 747 [2022-11-19 07:01:24,802 INFO L226 Difference]: Without dead ends: 419 [2022-11-19 07:01:24,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 166 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:01:24,805 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 145 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:24,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 441 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-19 07:01:24,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 409. [2022-11-19 07:01:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 326 states have (on average 1.1411042944785277) internal successors, (372), 319 states have internal predecessors, (372), 47 states have call successors, (47), 20 states have call predecessors, (47), 32 states have return successors, (95), 69 states have call predecessors, (95), 46 states have call successors, (95) [2022-11-19 07:01:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 514 transitions. [2022-11-19 07:01:24,841 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 514 transitions. Word has length 87 [2022-11-19 07:01:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:24,841 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 514 transitions. [2022-11-19 07:01:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.333333333333333) internal successors, (65), 11 states have internal predecessors, (65), 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) [2022-11-19 07:01:24,843 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 514 transitions. [2022-11-19 07:01:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-19 07:01:24,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:24,845 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:24,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:25,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:01:25,058 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:25,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:25,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1851582219, now seen corresponding path program 1 times [2022-11-19 07:01:25,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:25,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781827221] [2022-11-19 07:01:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:25,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:25,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 46 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:01:25,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:25,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781827221] [2022-11-19 07:01:25,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781827221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:25,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261106793] [2022-11-19 07:01:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:25,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:25,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:25,487 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:25,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:01:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:25,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 07:01:25,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-19 07:01:25,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-19 07:01:26,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261106793] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:26,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766021640] [2022-11-19 07:01:26,337 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:26,337 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:26,337 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:336) 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) [2022-11-19 07:01:26,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:26,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 11] total 36 [2022-11-19 07:01:26,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489637539] [2022-11-19 07:01:26,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:26,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:01:26,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:26,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:01:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:01:26,340 INFO L87 Difference]: Start difference. First operand 409 states and 514 transitions. Second operand has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 30 states have internal predecessors, (113), 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) [2022-11-19 07:01:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:30,569 INFO L93 Difference]: Finished difference Result 1225 states and 1757 transitions. [2022-11-19 07:01:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-19 07:01:30,570 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 30 states have internal predecessors, (113), 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 91 [2022-11-19 07:01:30,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:30,575 INFO L225 Difference]: With dead ends: 1225 [2022-11-19 07:01:30,575 INFO L226 Difference]: Without dead ends: 821 [2022-11-19 07:01:30,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3735 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1609, Invalid=11273, Unknown=0, NotChecked=0, Total=12882 [2022-11-19 07:01:30,582 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 532 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 2932 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:30,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 260 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2932 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 07:01:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-11-19 07:01:30,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 602. [2022-11-19 07:01:30,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 485 states have (on average 1.1175257731958763) internal successors, (542), 463 states have internal predecessors, (542), 64 states have call successors, (64), 20 states have call predecessors, (64), 49 states have return successors, (267), 118 states have call predecessors, (267), 63 states have call successors, (267) [2022-11-19 07:01:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 873 transitions. [2022-11-19 07:01:30,627 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 873 transitions. Word has length 91 [2022-11-19 07:01:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:30,627 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 873 transitions. [2022-11-19 07:01:30,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 30 states have internal predecessors, (113), 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) [2022-11-19 07:01:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 873 transitions. [2022-11-19 07:01:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:01:30,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:30,629 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] [2022-11-19 07:01:30,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:30,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:01:30,835 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:30,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:30,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1459155797, now seen corresponding path program 1 times [2022-11-19 07:01:30,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:30,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571003454] [2022-11-19 07:01:30,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:30,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:30,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:31,179 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-19 07:01:31,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571003454] [2022-11-19 07:01:31,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571003454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:31,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959191191] [2022-11-19 07:01:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:31,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:31,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:31,181 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:31,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:01:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:31,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:01:31,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-19 07:01:31,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-19 07:01:32,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959191191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:32,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2016651081] [2022-11-19 07:01:32,154 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:32,154 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:32,155 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:336) 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) [2022-11-19 07:01:32,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:32,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-11-19 07:01:32,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403026221] [2022-11-19 07:01:32,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:32,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:01:32,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:32,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:01:32,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:01:32,157 INFO L87 Difference]: Start difference. First operand 602 states and 873 transitions. Second operand has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 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) [2022-11-19 07:01:32,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:32,998 INFO L93 Difference]: Finished difference Result 1326 states and 2206 transitions. [2022-11-19 07:01:32,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-19 07:01:32,999 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 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 106 [2022-11-19 07:01:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:33,013 INFO L225 Difference]: With dead ends: 1326 [2022-11-19 07:01:33,013 INFO L226 Difference]: Without dead ends: 1323 [2022-11-19 07:01:33,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 189 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=442, Invalid=2638, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 07:01:33,018 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 90 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:33,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 769 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323 states. [2022-11-19 07:01:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1323 to 866. [2022-11-19 07:01:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 699 states have (on average 1.094420600858369) internal successors, (765), 664 states have internal predecessors, (765), 88 states have call successors, (88), 20 states have call predecessors, (88), 75 states have return successors, (637), 181 states have call predecessors, (637), 87 states have call successors, (637) [2022-11-19 07:01:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1490 transitions. [2022-11-19 07:01:33,113 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1490 transitions. Word has length 106 [2022-11-19 07:01:33,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1490 transitions. [2022-11-19 07:01:33,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.696969696969697) internal successors, (89), 34 states have internal predecessors, (89), 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) [2022-11-19 07:01:33,114 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1490 transitions. [2022-11-19 07:01:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:01:33,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:33,116 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, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:33,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:33,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:01:33,322 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:33,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:33,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1751044463, now seen corresponding path program 1 times [2022-11-19 07:01:33,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:33,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232244922] [2022-11-19 07:01:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:33,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:33,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 38 proven. 3 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-19 07:01:33,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:33,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232244922] [2022-11-19 07:01:33,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232244922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:33,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633677398] [2022-11-19 07:01:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:33,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:33,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:33,422 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:33,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:01:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:33,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:01:33,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:01:34,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633677398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:34,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109790429] [2022-11-19 07:01:34,045 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:34,045 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:34,045 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:336) 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) [2022-11-19 07:01:34,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:34,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 21 [2022-11-19 07:01:34,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923342101] [2022-11-19 07:01:34,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:01:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:01:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:01:34,047 INFO L87 Difference]: Start difference. First operand 866 states and 1490 transitions. Second operand has 21 states, 20 states have (on average 4.7) internal successors, (94), 16 states have internal predecessors, (94), 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) [2022-11-19 07:01:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:34,680 INFO L93 Difference]: Finished difference Result 1676 states and 3278 transitions. [2022-11-19 07:01:34,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:01:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 16 states have internal predecessors, (94), 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 106 [2022-11-19 07:01:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:34,689 INFO L225 Difference]: With dead ends: 1676 [2022-11-19 07:01:34,689 INFO L226 Difference]: Without dead ends: 876 [2022-11-19 07:01:34,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 191 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:01:34,701 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 186 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:34,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 584 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:01:34,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-11-19 07:01:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 866. [2022-11-19 07:01:34,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 699 states have (on average 1.094420600858369) internal successors, (765), 664 states have internal predecessors, (765), 88 states have call successors, (88), 20 states have call predecessors, (88), 75 states have return successors, (635), 181 states have call predecessors, (635), 87 states have call successors, (635) [2022-11-19 07:01:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1488 transitions. [2022-11-19 07:01:34,769 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1488 transitions. Word has length 106 [2022-11-19 07:01:34,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:34,770 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 1488 transitions. [2022-11-19 07:01:34,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.7) internal successors, (94), 16 states have internal predecessors, (94), 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) [2022-11-19 07:01:34,770 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1488 transitions. [2022-11-19 07:01:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-19 07:01:34,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:34,772 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] [2022-11-19 07:01:34,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:34,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:01:34,978 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:34,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:34,978 INFO L85 PathProgramCache]: Analyzing trace with hash 2010810646, now seen corresponding path program 2 times [2022-11-19 07:01:34,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:34,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504530752] [2022-11-19 07:01:34,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:34,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-19 07:01:35,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:35,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504530752] [2022-11-19 07:01:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504530752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254987053] [2022-11-19 07:01:35,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:35,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:35,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:35,298 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:35,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:01:35,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:01:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:35,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:35,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:01:35,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 07:01:35,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254987053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1248793826] [2022-11-19 07:01:35,709 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:35,709 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:35,710 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:336) 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) [2022-11-19 07:01:35,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:35,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-11-19 07:01:35,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953016409] [2022-11-19 07:01:35,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:35,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:01:35,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:01:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:01:35,713 INFO L87 Difference]: Start difference. First operand 866 states and 1488 transitions. Second operand has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 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) [2022-11-19 07:01:36,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:36,245 INFO L93 Difference]: Finished difference Result 1338 states and 2268 transitions. [2022-11-19 07:01:36,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:01:36,246 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 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 107 [2022-11-19 07:01:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:36,256 INFO L225 Difference]: With dead ends: 1338 [2022-11-19 07:01:36,256 INFO L226 Difference]: Without dead ends: 1335 [2022-11-19 07:01:36,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 07:01:36,259 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 53 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:36,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 555 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:36,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-11-19 07:01:36,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1030. [2022-11-19 07:01:36,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 835 states have (on average 1.0910179640718562) internal successors, (911), 786 states have internal predecessors, (911), 99 states have call successors, (99), 20 states have call predecessors, (99), 92 states have return successors, (864), 223 states have call predecessors, (864), 98 states have call successors, (864) [2022-11-19 07:01:36,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1874 transitions. [2022-11-19 07:01:36,336 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1874 transitions. Word has length 107 [2022-11-19 07:01:36,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:36,337 INFO L495 AbstractCegarLoop]: Abstraction has 1030 states and 1874 transitions. [2022-11-19 07:01:36,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.652173913043478) internal successors, (84), 24 states have internal predecessors, (84), 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) [2022-11-19 07:01:36,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1874 transitions. [2022-11-19 07:01:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-11-19 07:01:36,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:36,340 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 07:01:36,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:36,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:01:36,546 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:36,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:36,546 INFO L85 PathProgramCache]: Analyzing trace with hash 260573280, now seen corresponding path program 1 times [2022-11-19 07:01:36,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:36,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973047482] [2022-11-19 07:01:36,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:36,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:36,923 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 92 proven. 163 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-19 07:01:36,923 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973047482] [2022-11-19 07:01:36,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973047482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:36,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902206225] [2022-11-19 07:01:36,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:36,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:36,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:36,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:36,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:01:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:01:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:37,352 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 82 proven. 128 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-19 07:01:37,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 82 proven. 128 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2022-11-19 07:01:37,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902206225] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:37,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109926693] [2022-11-19 07:01:37,824 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:37,825 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:37,825 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:336) 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) [2022-11-19 07:01:37,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:37,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 34 [2022-11-19 07:01:37,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110269184] [2022-11-19 07:01:37,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:37,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-19 07:01:37,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:37,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-19 07:01:37,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1024, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:01:37,829 INFO L87 Difference]: Start difference. First operand 1030 states and 1874 transitions. Second operand has 34 states, 32 states have (on average 4.3125) internal successors, (138), 26 states have internal predecessors, (138), 19 states have call successors, (25), 9 states have call predecessors, (25), 6 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:01:39,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:39,318 INFO L93 Difference]: Finished difference Result 2034 states and 4076 transitions. [2022-11-19 07:01:39,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 07:01:39,319 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 4.3125) internal successors, (138), 26 states have internal predecessors, (138), 19 states have call successors, (25), 9 states have call predecessors, (25), 6 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) Word has length 158 [2022-11-19 07:01:39,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:39,327 INFO L225 Difference]: With dead ends: 2034 [2022-11-19 07:01:39,327 INFO L226 Difference]: Without dead ends: 994 [2022-11-19 07:01:39,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 298 SyntacticMatches, 11 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=2931, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 07:01:39,339 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 542 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1762 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:39,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 824 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1762 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 07:01:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2022-11-19 07:01:39,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 931. [2022-11-19 07:01:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 749 states have (on average 1.0881174899866488) internal successors, (815), 716 states have internal predecessors, (815), 91 states have call successors, (91), 23 states have call predecessors, (91), 87 states have return successors, (682), 191 states have call predecessors, (682), 90 states have call successors, (682) [2022-11-19 07:01:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1588 transitions. [2022-11-19 07:01:39,402 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1588 transitions. Word has length 158 [2022-11-19 07:01:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:39,402 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1588 transitions. [2022-11-19 07:01:39,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 4.3125) internal successors, (138), 26 states have internal predecessors, (138), 19 states have call successors, (25), 9 states have call predecessors, (25), 6 states have return successors, (17), 9 states have call predecessors, (17), 11 states have call successors, (17) [2022-11-19 07:01:39,403 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1588 transitions. [2022-11-19 07:01:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:01:39,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:39,406 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 8, 6, 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, 1, 1, 1, 1, 1] [2022-11-19 07:01:39,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:39,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:39,612 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:39,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1115159251, now seen corresponding path program 2 times [2022-11-19 07:01:39,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:39,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934302559] [2022-11-19 07:01:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:39,903 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 127 proven. 124 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-19 07:01:39,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:39,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934302559] [2022-11-19 07:01:39,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934302559] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008003139] [2022-11-19 07:01:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:39,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:39,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:39,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:01:39,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:01:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:39,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:39,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:01:40,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 126 proven. 3 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:01:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008003139] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552177049] [2022-11-19 07:01:40,470 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:40,470 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:40,471 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:336) 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) [2022-11-19 07:01:40,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:40,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 24 [2022-11-19 07:01:40,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125673117] [2022-11-19 07:01:40,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:40,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:01:40,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:40,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:01:40,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:01:40,474 INFO L87 Difference]: Start difference. First operand 931 states and 1588 transitions. Second operand has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 20 states have internal predecessors, (111), 12 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-19 07:01:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:41,426 INFO L93 Difference]: Finished difference Result 1760 states and 3595 transitions. [2022-11-19 07:01:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:01:41,427 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 20 states have internal predecessors, (111), 12 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 159 [2022-11-19 07:01:41,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:41,435 INFO L225 Difference]: With dead ends: 1760 [2022-11-19 07:01:41,436 INFO L226 Difference]: Without dead ends: 900 [2022-11-19 07:01:41,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 313 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-11-19 07:01:41,446 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 231 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:41,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 349 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:01:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-11-19 07:01:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 838. [2022-11-19 07:01:41,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 668 states have (on average 1.0778443113772456) internal successors, (720), 649 states have internal predecessors, (720), 89 states have call successors, (89), 26 states have call predecessors, (89), 77 states have return successors, (620), 162 states have call predecessors, (620), 88 states have call successors, (620) [2022-11-19 07:01:41,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1429 transitions. [2022-11-19 07:01:41,516 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1429 transitions. Word has length 159 [2022-11-19 07:01:41,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:41,516 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1429 transitions. [2022-11-19 07:01:41,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.826086956521739) internal successors, (111), 20 states have internal predecessors, (111), 12 states have call successors, (19), 5 states have call predecessors, (19), 7 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-19 07:01:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1429 transitions. [2022-11-19 07:01:41,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-19 07:01:41,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:41,520 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-11-19 07:01:41,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:41,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:41,725 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:41,726 INFO L85 PathProgramCache]: Analyzing trace with hash 749278453, now seen corresponding path program 3 times [2022-11-19 07:01:41,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:41,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842224219] [2022-11-19 07:01:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:42,442 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 45 proven. 82 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-19 07:01:42,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:42,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842224219] [2022-11-19 07:01:42,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842224219] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:42,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940282126] [2022-11-19 07:01:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:01:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:42,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:42,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:42,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:01:42,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:01:42,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:42,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:01:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 45 proven. 56 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-19 07:01:42,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 74 proven. 51 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-19 07:01:44,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940282126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:44,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214379659] [2022-11-19 07:01:44,359 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:44,359 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:44,359 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:336) 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) [2022-11-19 07:01:44,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:44,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2022-11-19 07:01:44,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186812532] [2022-11-19 07:01:44,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:44,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-19 07:01:44,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-19 07:01:44,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 07:01:44,363 INFO L87 Difference]: Start difference. First operand 838 states and 1429 transitions. Second operand has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 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) [2022-11-19 07:01:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:45,365 INFO L93 Difference]: Finished difference Result 1254 states and 2086 transitions. [2022-11-19 07:01:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-19 07:01:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 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 159 [2022-11-19 07:01:45,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:45,376 INFO L225 Difference]: With dead ends: 1254 [2022-11-19 07:01:45,377 INFO L226 Difference]: Without dead ends: 1242 [2022-11-19 07:01:45,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 289 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=702, Invalid=4410, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 07:01:45,381 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 107 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:45,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 898 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:01:45,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-19 07:01:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 890. [2022-11-19 07:01:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 711 states have (on average 1.0632911392405062) internal successors, (756), 690 states have internal predecessors, (756), 88 states have call successors, (88), 26 states have call predecessors, (88), 87 states have return successors, (605), 173 states have call predecessors, (605), 87 states have call successors, (605) [2022-11-19 07:01:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1449 transitions. [2022-11-19 07:01:45,464 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1449 transitions. Word has length 159 [2022-11-19 07:01:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:45,465 INFO L495 AbstractCegarLoop]: Abstraction has 890 states and 1449 transitions. [2022-11-19 07:01:45,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.6363636363636362) internal successors, (116), 45 states have internal predecessors, (116), 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) [2022-11-19 07:01:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1449 transitions. [2022-11-19 07:01:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-19 07:01:45,469 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:45,469 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 8, 8, 7, 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] [2022-11-19 07:01:45,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:45,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-19 07:01:45,675 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:45,675 INFO L85 PathProgramCache]: Analyzing trace with hash 363169389, now seen corresponding path program 1 times [2022-11-19 07:01:45,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:45,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150661308] [2022-11-19 07:01:45,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:45,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 156 proven. 148 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-11-19 07:01:46,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150661308] [2022-11-19 07:01:46,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150661308] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:46,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139384514] [2022-11-19 07:01:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:46,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:46,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:46,077 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:46,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:01:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:46,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:01:46,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 50 proven. 121 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2022-11-19 07:01:46,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 61 proven. 122 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-11-19 07:01:48,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139384514] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:48,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [259275914] [2022-11-19 07:01:48,193 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:48,194 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:48,194 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:336) 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) [2022-11-19 07:01:48,194 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 22] total 51 [2022-11-19 07:01:48,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522488289] [2022-11-19 07:01:48,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:48,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-19 07:01:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-19 07:01:48,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2356, Unknown=0, NotChecked=0, Total=2550 [2022-11-19 07:01:48,197 INFO L87 Difference]: Start difference. First operand 890 states and 1449 transitions. Second operand has 51 states, 50 states have (on average 3.42) internal successors, (171), 47 states have internal predecessors, (171), 20 states have call successors, (26), 5 states have call predecessors, (26), 15 states have return successors, (32), 27 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-19 07:01:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:53,459 INFO L93 Difference]: Finished difference Result 2535 states and 4603 transitions. [2022-11-19 07:01:53,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-19 07:01:53,459 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.42) internal successors, (171), 47 states have internal predecessors, (171), 20 states have call successors, (26), 5 states have call predecessors, (26), 15 states have return successors, (32), 27 states have call predecessors, (32), 16 states have call successors, (32) Word has length 178 [2022-11-19 07:01:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:53,474 INFO L225 Difference]: With dead ends: 2535 [2022-11-19 07:01:53,474 INFO L226 Difference]: Without dead ends: 1679 [2022-11-19 07:01:53,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 336 SyntacticMatches, 9 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7330 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2574, Invalid=20076, Unknown=0, NotChecked=0, Total=22650 [2022-11-19 07:01:53,487 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 615 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2973 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 2973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:53,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 189 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 2973 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-19 07:01:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-11-19 07:01:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1084. [2022-11-19 07:01:53,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 859 states have (on average 1.059371362048894) internal successors, (910), 841 states have internal predecessors, (910), 112 states have call successors, (112), 26 states have call predecessors, (112), 109 states have return successors, (885), 216 states have call predecessors, (885), 111 states have call successors, (885) [2022-11-19 07:01:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 1907 transitions. [2022-11-19 07:01:53,589 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 1907 transitions. Word has length 178 [2022-11-19 07:01:53,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:53,589 INFO L495 AbstractCegarLoop]: Abstraction has 1084 states and 1907 transitions. [2022-11-19 07:01:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.42) internal successors, (171), 47 states have internal predecessors, (171), 20 states have call successors, (26), 5 states have call predecessors, (26), 15 states have return successors, (32), 27 states have call predecessors, (32), 16 states have call successors, (32) [2022-11-19 07:01:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 1907 transitions. [2022-11-19 07:01:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-11-19 07:01:53,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:53,593 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1] [2022-11-19 07:01:53,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 07:01:53,800 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash 952845753, now seen corresponding path program 3 times [2022-11-19 07:01:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614511347] [2022-11-19 07:01:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:53,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:54,211 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 135 proven. 176 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-19 07:01:54,212 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614511347] [2022-11-19 07:01:54,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614511347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:54,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74665575] [2022-11-19 07:01:54,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:01:54,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:54,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:54,215 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:54,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:01:54,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:01:54,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:54,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:54,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 173 proven. 232 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-19 07:01:54,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 173 proven. 239 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-19 07:01:55,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74665575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:55,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382083874] [2022-11-19 07:01:55,484 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:55,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:55,484 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:336) 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) [2022-11-19 07:01:55,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:55,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17] total 32 [2022-11-19 07:01:55,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580355421] [2022-11-19 07:01:55,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:55,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:01:55,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:55,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:01:55,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:01:55,498 INFO L87 Difference]: Start difference. First operand 1084 states and 1907 transitions. Second operand has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 27 states have internal predecessors, (154), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-19 07:01:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:56,694 INFO L93 Difference]: Finished difference Result 2202 states and 4063 transitions. [2022-11-19 07:01:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 07:01:56,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 27 states have internal predecessors, (154), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) Word has length 210 [2022-11-19 07:01:56,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:56,704 INFO L225 Difference]: With dead ends: 2202 [2022-11-19 07:01:56,704 INFO L226 Difference]: Without dead ends: 1155 [2022-11-19 07:01:56,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 401 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-11-19 07:01:56,716 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 429 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 1320 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:56,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 312 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 07:01:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-11-19 07:01:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 977. [2022-11-19 07:01:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 780 states have (on average 1.064102564102564) internal successors, (830), 756 states have internal predecessors, (830), 105 states have call successors, (105), 37 states have call predecessors, (105), 88 states have return successors, (479), 183 states have call predecessors, (479), 104 states have call successors, (479) [2022-11-19 07:01:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1414 transitions. [2022-11-19 07:01:56,786 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1414 transitions. Word has length 210 [2022-11-19 07:01:56,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:56,786 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1414 transitions. [2022-11-19 07:01:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.967741935483871) internal successors, (154), 27 states have internal predecessors, (154), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-19 07:01:56,787 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1414 transitions. [2022-11-19 07:01:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-19 07:01:56,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:56,792 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 12, 11, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 1, 1, 1] [2022-11-19 07:01:56,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:56,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:56,999 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:56,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1461291323, now seen corresponding path program 4 times [2022-11-19 07:01:56,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:56,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832556220] [2022-11-19 07:01:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:57,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2022-11-19 07:01:57,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832556220] [2022-11-19 07:01:57,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832556220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:57,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793997158] [2022-11-19 07:01:57,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:01:57,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:57,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:57,419 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:57,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-19 07:01:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:57,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:01:57,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 302 proven. 199 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2022-11-19 07:01:57,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 302 proven. 199 refuted. 0 times theorem prover too weak. 709 trivial. 0 not checked. [2022-11-19 07:01:58,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793997158] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:58,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [945828173] [2022-11-19 07:01:58,175 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:01:58,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:01:58,176 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:336) 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) [2022-11-19 07:01:58,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:58,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-19 07:01:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858902637] [2022-11-19 07:01:58,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:58,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:01:58,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:01:58,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:01:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:01:58,182 INFO L87 Difference]: Start difference. First operand 977 states and 1414 transitions. Second operand has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 17 states have internal predecessors, (102), 12 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 07:01:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:58,796 INFO L93 Difference]: Finished difference Result 2208 states and 3237 transitions. [2022-11-19 07:01:58,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 07:01:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 17 states have internal predecessors, (102), 12 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) Word has length 269 [2022-11-19 07:01:58,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:58,805 INFO L225 Difference]: With dead ends: 2208 [2022-11-19 07:01:58,805 INFO L226 Difference]: Without dead ends: 1306 [2022-11-19 07:01:58,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 524 SyntacticMatches, 13 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1294, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:01:58,812 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 213 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:58,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 264 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-11-19 07:01:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1272. [2022-11-19 07:01:58,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1012 states have (on average 1.0602766798418972) internal successors, (1073), 990 states have internal predecessors, (1073), 135 states have call successors, (135), 48 states have call predecessors, (135), 121 states have return successors, (522), 233 states have call predecessors, (522), 134 states have call successors, (522) [2022-11-19 07:01:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1730 transitions. [2022-11-19 07:01:58,909 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1730 transitions. Word has length 269 [2022-11-19 07:01:58,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:58,910 INFO L495 AbstractCegarLoop]: Abstraction has 1272 states and 1730 transitions. [2022-11-19 07:01:58,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.857142857142857) internal successors, (102), 17 states have internal predecessors, (102), 12 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (14), 7 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 07:01:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1730 transitions. [2022-11-19 07:01:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-11-19 07:01:58,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:58,915 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, 4, 4, 3, 3, 1, 1, 1, 1] [2022-11-19 07:01:58,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-19 07:01:59,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:59,122 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:01:59,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:59,122 INFO L85 PathProgramCache]: Analyzing trace with hash 346296934, now seen corresponding path program 2 times [2022-11-19 07:01:59,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:01:59,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897099240] [2022-11-19 07:01:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:59,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:01:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 139 proven. 154 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-11-19 07:01:59,381 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:01:59,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897099240] [2022-11-19 07:01:59,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897099240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:59,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027451771] [2022-11-19 07:01:59,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:01:59,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:59,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:59,383 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:59,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 07:01:59,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 07:01:59,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:01:59,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:01:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:59,611 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 215 proven. 7 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-11-19 07:01:59,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 215 proven. 7 refuted. 0 times theorem prover too weak. 671 trivial. 0 not checked. [2022-11-19 07:02:00,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027451771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:00,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1314666093] [2022-11-19 07:02:00,073 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:00,073 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:00,073 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:336) 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) [2022-11-19 07:02:00,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:00,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 21 [2022-11-19 07:02:00,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308553445] [2022-11-19 07:02:00,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:00,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:02:00,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:00,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:02:00,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:02:00,077 INFO L87 Difference]: Start difference. First operand 1272 states and 1730 transitions. Second operand has 21 states, 20 states have (on average 5.1) internal successors, (102), 18 states have internal predecessors, (102), 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) [2022-11-19 07:02:00,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:00,860 INFO L93 Difference]: Finished difference Result 2549 states and 3698 transitions. [2022-11-19 07:02:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:02:00,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 18 states have internal predecessors, (102), 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 232 [2022-11-19 07:02:00,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:00,870 INFO L225 Difference]: With dead ends: 2549 [2022-11-19 07:02:00,870 INFO L226 Difference]: Without dead ends: 1415 [2022-11-19 07:02:00,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 457 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:02:00,876 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 194 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:00,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 610 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:02:00,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-19 07:02:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1295. [2022-11-19 07:02:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1033 states have (on average 1.0619554695062923) internal successors, (1097), 1006 states have internal predecessors, (1097), 138 states have call successors, (138), 54 states have call predecessors, (138), 120 states have return successors, (509), 234 states have call predecessors, (509), 137 states have call successors, (509) [2022-11-19 07:02:00,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1744 transitions. [2022-11-19 07:02:00,955 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1744 transitions. Word has length 232 [2022-11-19 07:02:00,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:00,956 INFO L495 AbstractCegarLoop]: Abstraction has 1295 states and 1744 transitions. [2022-11-19 07:02:00,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 18 states have internal predecessors, (102), 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) [2022-11-19 07:02:00,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1744 transitions. [2022-11-19 07:02:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-19 07:02:00,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:00,960 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 11, 10, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 1, 1, 1] [2022-11-19 07:02:00,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:01,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-19 07:02:01,166 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash 829070859, now seen corresponding path program 3 times [2022-11-19 07:02:01,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:01,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138323948] [2022-11-19 07:02:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 156 proven. 3 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2022-11-19 07:02:01,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138323948] [2022-11-19 07:02:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138323948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:01,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7230615] [2022-11-19 07:02:01,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:02:01,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:01,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:01,331 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:01,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-19 07:02:01,468 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:02:01,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:01,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:02:01,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 229 proven. 318 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2022-11-19 07:02:01,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 229 proven. 331 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-11-19 07:02:03,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7230615] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:03,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [52002080] [2022-11-19 07:02:03,007 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:03,007 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:03,008 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:336) 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) [2022-11-19 07:02:03,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:03,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 19] total 25 [2022-11-19 07:02:03,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527923958] [2022-11-19 07:02:03,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:03,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:02:03,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:03,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:02:03,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:02:03,014 INFO L87 Difference]: Start difference. First operand 1295 states and 1744 transitions. Second operand has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 19 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) [2022-11-19 07:02:03,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:03,663 INFO L93 Difference]: Finished difference Result 2052 states and 2821 transitions. [2022-11-19 07:02:03,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 07:02:03,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 19 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) Word has length 250 [2022-11-19 07:02:03,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:03,670 INFO L225 Difference]: With dead ends: 2052 [2022-11-19 07:02:03,670 INFO L226 Difference]: Without dead ends: 910 [2022-11-19 07:02:03,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 476 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:02:03,676 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 200 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:03,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 334 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:02:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-11-19 07:02:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 813. [2022-11-19 07:02:03,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 648 states have (on average 1.0401234567901234) internal successors, (674), 637 states have internal predecessors, (674), 97 states have call successors, (97), 54 states have call predecessors, (97), 66 states have return successors, (196), 121 states have call predecessors, (196), 96 states have call successors, (196) [2022-11-19 07:02:03,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 967 transitions. [2022-11-19 07:02:03,748 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 967 transitions. Word has length 250 [2022-11-19 07:02:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:03,749 INFO L495 AbstractCegarLoop]: Abstraction has 813 states and 967 transitions. [2022-11-19 07:02:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.08) internal successors, (152), 25 states have internal predecessors, (152), 19 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) [2022-11-19 07:02:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 967 transitions. [2022-11-19 07:02:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-11-19 07:02:03,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:03,752 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, 5, 5, 4, 4, 3, 2, 1, 1, 1] [2022-11-19 07:02:03,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:03,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-19 07:02:03,958 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:03,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:03,959 INFO L85 PathProgramCache]: Analyzing trace with hash -835618356, now seen corresponding path program 4 times [2022-11-19 07:02:03,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:03,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514450589] [2022-11-19 07:02:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 149 proven. 243 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-19 07:02:05,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514450589] [2022-11-19 07:02:05,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514450589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:05,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557834777] [2022-11-19 07:02:05,345 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:02:05,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:05,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:05,348 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:05,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-19 07:02:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:05,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-19 07:02:05,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 148 proven. 176 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-19 07:02:05,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:09,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 218 proven. 155 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2022-11-19 07:02:09,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557834777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:09,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1223902053] [2022-11-19 07:02:09,216 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:09,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:09,217 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:336) 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) [2022-11-19 07:02:09,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:09,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 29] total 56 [2022-11-19 07:02:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719972924] [2022-11-19 07:02:09,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-19 07:02:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:09,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-19 07:02:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 07:02:09,221 INFO L87 Difference]: Start difference. First operand 813 states and 967 transitions. Second operand has 57 states, 56 states have (on average 2.607142857142857) internal successors, (146), 57 states have internal predecessors, (146), 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) [2022-11-19 07:02:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:09,630 INFO L93 Difference]: Finished difference Result 955 states and 1130 transitions. [2022-11-19 07:02:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 07:02:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.607142857142857) internal successors, (146), 57 states have internal predecessors, (146), 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 251 [2022-11-19 07:02:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:09,637 INFO L225 Difference]: With dead ends: 955 [2022-11-19 07:02:09,637 INFO L226 Difference]: Without dead ends: 938 [2022-11-19 07:02:09,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 556 GetRequests, 467 SyntacticMatches, 27 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3057 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=513, Invalid=3519, Unknown=0, NotChecked=0, Total=4032 [2022-11-19 07:02:09,639 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:09,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 552 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:02:09,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-19 07:02:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 795. [2022-11-19 07:02:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 633 states have (on average 1.0347551342812007) internal successors, (655), 624 states have internal predecessors, (655), 96 states have call successors, (96), 54 states have call predecessors, (96), 64 states have return successors, (186), 116 states have call predecessors, (186), 95 states have call successors, (186) [2022-11-19 07:02:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 937 transitions. [2022-11-19 07:02:09,691 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 937 transitions. Word has length 251 [2022-11-19 07:02:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:09,692 INFO L495 AbstractCegarLoop]: Abstraction has 795 states and 937 transitions. [2022-11-19 07:02:09,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.607142857142857) internal successors, (146), 57 states have internal predecessors, (146), 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) [2022-11-19 07:02:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 937 transitions. [2022-11-19 07:02:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-19 07:02:09,696 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:09,697 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 16, 15, 14, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 5, 5, 2, 1, 1, 1] [2022-11-19 07:02:09,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-19 07:02:09,903 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash -126895203, now seen corresponding path program 4 times [2022-11-19 07:02:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:09,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252103066] [2022-11-19 07:02:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 297 proven. 201 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2022-11-19 07:02:10,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252103066] [2022-11-19 07:02:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252103066] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404130503] [2022-11-19 07:02:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:02:10,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:10,351 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:10,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-19 07:02:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 07:02:10,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 1147 proven. 168 refuted. 0 times theorem prover too weak. 701 trivial. 0 not checked. [2022-11-19 07:02:10,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 240 proven. 389 refuted. 0 times theorem prover too weak. 1387 trivial. 0 not checked. [2022-11-19 07:02:11,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404130503] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:11,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432139900] [2022-11-19 07:02:11,664 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:11,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:11,665 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:336) 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) [2022-11-19 07:02:11,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:11,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 19 [2022-11-19 07:02:11,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333873290] [2022-11-19 07:02:11,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:11,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:02:11,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:11,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:02:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:02:11,668 INFO L87 Difference]: Start difference. First operand 795 states and 937 transitions. Second operand has 19 states, 18 states have (on average 7.555555555555555) internal successors, (136), 17 states have internal predecessors, (136), 13 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-19 07:02:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:12,050 INFO L93 Difference]: Finished difference Result 1469 states and 1734 transitions. [2022-11-19 07:02:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:02:12,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 7.555555555555555) internal successors, (136), 17 states have internal predecessors, (136), 13 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) Word has length 343 [2022-11-19 07:02:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:12,055 INFO L225 Difference]: With dead ends: 1469 [2022-11-19 07:02:12,055 INFO L226 Difference]: Without dead ends: 774 [2022-11-19 07:02:12,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 673 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:02:12,058 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 149 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:12,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 179 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:02:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-11-19 07:02:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 753. [2022-11-19 07:02:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 599 states have (on average 1.0367278797996662) internal successors, (621), 592 states have internal predecessors, (621), 91 states have call successors, (91), 52 states have call predecessors, (91), 61 states have return successors, (173), 108 states have call predecessors, (173), 90 states have call successors, (173) [2022-11-19 07:02:12,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 885 transitions. [2022-11-19 07:02:12,100 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 885 transitions. Word has length 343 [2022-11-19 07:02:12,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:12,100 INFO L495 AbstractCegarLoop]: Abstraction has 753 states and 885 transitions. [2022-11-19 07:02:12,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 7.555555555555555) internal successors, (136), 17 states have internal predecessors, (136), 13 states have call successors, (24), 4 states have call predecessors, (24), 8 states have return successors, (26), 10 states have call predecessors, (26), 11 states have call successors, (26) [2022-11-19 07:02:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 885 transitions. [2022-11-19 07:02:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-19 07:02:12,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:12,105 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 16, 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, 5, 5, 4, 1, 1, 1] [2022-11-19 07:02:12,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:12,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-19 07:02:12,312 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2039783884, now seen corresponding path program 5 times [2022-11-19 07:02:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687628278] [2022-11-19 07:02:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:12,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2777 backedges. 381 proven. 207 refuted. 0 times theorem prover too weak. 2189 trivial. 0 not checked. [2022-11-19 07:02:12,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:12,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687628278] [2022-11-19 07:02:12,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687628278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:12,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953305306] [2022-11-19 07:02:12,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:02:12,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:12,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:12,785 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:12,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 07:02:12,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:02:12,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:12,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:02:13,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2777 backedges. 459 proven. 6 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2022-11-19 07:02:13,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:13,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2777 backedges. 459 proven. 6 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2022-11-19 07:02:13,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953305306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:13,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [234667076] [2022-11-19 07:02:13,883 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:13,884 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:13,884 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:336) 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) [2022-11-19 07:02:13,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:13,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2022-11-19 07:02:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018327145] [2022-11-19 07:02:13,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:13,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:02:13,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:02:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:02:13,886 INFO L87 Difference]: Start difference. First operand 753 states and 885 transitions. Second operand has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 10 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-19 07:02:14,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:14,447 INFO L93 Difference]: Finished difference Result 1393 states and 1677 transitions. [2022-11-19 07:02:14,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:02:14,447 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 10 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 401 [2022-11-19 07:02:14,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:14,451 INFO L225 Difference]: With dead ends: 1393 [2022-11-19 07:02:14,451 INFO L226 Difference]: Without dead ends: 735 [2022-11-19 07:02:14,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 794 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:02:14,453 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:14,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 237 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:02:14,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-19 07:02:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 696. [2022-11-19 07:02:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 555 states have (on average 1.0360360360360361) internal successors, (575), 547 states have internal predecessors, (575), 83 states have call successors, (83), 52 states have call predecessors, (83), 56 states have return successors, (149), 96 states have call predecessors, (149), 82 states have call successors, (149) [2022-11-19 07:02:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 807 transitions. [2022-11-19 07:02:14,493 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 807 transitions. Word has length 401 [2022-11-19 07:02:14,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:14,493 INFO L495 AbstractCegarLoop]: Abstraction has 696 states and 807 transitions. [2022-11-19 07:02:14,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 18 states have internal predecessors, (106), 10 states have call successors, (17), 3 states have call predecessors, (17), 7 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-11-19 07:02:14,494 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 807 transitions. [2022-11-19 07:02:14,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-11-19 07:02:14,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:14,497 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] [2022-11-19 07:02:14,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:14,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-19 07:02:14,703 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:14,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1497925245, now seen corresponding path program 6 times [2022-11-19 07:02:14,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:14,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699181870] [2022-11-19 07:02:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 440 proven. 692 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-19 07:02:17,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699181870] [2022-11-19 07:02:17,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699181870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:17,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730016942] [2022-11-19 07:02:17,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:02:17,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:17,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:17,798 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:17,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-19 07:02:18,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:02:18,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-19 07:02:18,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 432 proven. 516 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2022-11-19 07:02:18,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 585 proven. 459 refuted. 0 times theorem prover too weak. 1749 trivial. 0 not checked. [2022-11-19 07:02:25,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730016942] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:25,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712922354] [2022-11-19 07:02:25,881 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:25,881 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:25,882 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:336) 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) [2022-11-19 07:02:25,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:25,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 37] total 68 [2022-11-19 07:02:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897376620] [2022-11-19 07:02:25,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:25,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-19 07:02:25,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:25,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-19 07:02:25,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4133, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:02:25,886 INFO L87 Difference]: Start difference. First operand 696 states and 807 transitions. Second operand has 69 states, 68 states have (on average 2.588235294117647) internal successors, (176), 69 states have internal predecessors, (176), 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) [2022-11-19 07:02:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:26,522 INFO L93 Difference]: Finished difference Result 879 states and 1035 transitions. [2022-11-19 07:02:26,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 07:02:26,523 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.588235294117647) internal successors, (176), 69 states have internal predecessors, (176), 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 402 [2022-11-19 07:02:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:26,527 INFO L225 Difference]: With dead ends: 879 [2022-11-19 07:02:26,527 INFO L226 Difference]: Without dead ends: 846 [2022-11-19 07:02:26,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 765 SyntacticMatches, 51 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5977 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=811, Invalid=5831, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 07:02:26,529 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 72 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:26,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 767 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:02:26,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2022-11-19 07:02:26,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 774. [2022-11-19 07:02:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 616 states have (on average 1.030844155844156) internal successors, (635), 608 states have internal predecessors, (635), 90 states have call successors, (90), 52 states have call predecessors, (90), 66 states have return successors, (172), 113 states have call predecessors, (172), 89 states have call successors, (172) [2022-11-19 07:02:26,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 897 transitions. [2022-11-19 07:02:26,575 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 897 transitions. Word has length 402 [2022-11-19 07:02:26,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:26,576 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 897 transitions. [2022-11-19 07:02:26,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.588235294117647) internal successors, (176), 69 states have internal predecessors, (176), 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) [2022-11-19 07:02:26,576 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 897 transitions. [2022-11-19 07:02:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2022-11-19 07:02:26,581 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:26,581 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 25, 24, 22, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 9, 8, 7, 3, 1, 1, 1] [2022-11-19 07:02:26,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-19 07:02:26,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:26,787 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:26,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 786227901, now seen corresponding path program 7 times [2022-11-19 07:02:26,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:26,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938621167] [2022-11-19 07:02:26,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:26,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 628 proven. 478 refuted. 0 times theorem prover too weak. 3669 trivial. 0 not checked. [2022-11-19 07:02:27,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938621167] [2022-11-19 07:02:27,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938621167] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:27,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155149126] [2022-11-19 07:02:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:02:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:27,481 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:27,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-19 07:02:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:27,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 987 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:02:27,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 2855 proven. 178 refuted. 0 times theorem prover too weak. 1742 trivial. 0 not checked. [2022-11-19 07:02:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 405 proven. 799 refuted. 0 times theorem prover too weak. 3571 trivial. 0 not checked. [2022-11-19 07:02:29,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155149126] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:29,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [293575281] [2022-11-19 07:02:29,363 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:29,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:29,364 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:336) 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) [2022-11-19 07:02:29,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:29,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 17] total 24 [2022-11-19 07:02:29,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763376858] [2022-11-19 07:02:29,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:29,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 07:02:29,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:29,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 07:02:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:02:29,368 INFO L87 Difference]: Start difference. First operand 774 states and 897 transitions. Second operand has 24 states, 23 states have (on average 7.043478260869565) internal successors, (162), 22 states have internal predecessors, (162), 16 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-19 07:02:29,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:29,813 INFO L93 Difference]: Finished difference Result 1447 states and 1691 transitions. [2022-11-19 07:02:29,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:02:29,814 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 7.043478260869565) internal successors, (162), 22 states have internal predecessors, (162), 16 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) Word has length 520 [2022-11-19 07:02:29,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:29,831 INFO L225 Difference]: With dead ends: 1447 [2022-11-19 07:02:29,831 INFO L226 Difference]: Without dead ends: 664 [2022-11-19 07:02:29,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1067 GetRequests, 1024 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 07:02:29,833 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 146 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:29,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 248 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:02:29,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-11-19 07:02:29,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 637. [2022-11-19 07:02:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 509 states have (on average 1.0353634577603144) internal successors, (527), 502 states have internal predecessors, (527), 77 states have call successors, (77), 52 states have call predecessors, (77), 50 states have return successors, (116), 82 states have call predecessors, (116), 76 states have call successors, (116) [2022-11-19 07:02:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 720 transitions. [2022-11-19 07:02:29,870 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 720 transitions. Word has length 520 [2022-11-19 07:02:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:29,870 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 720 transitions. [2022-11-19 07:02:29,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 7.043478260869565) internal successors, (162), 22 states have internal predecessors, (162), 16 states have call successors, (29), 4 states have call predecessors, (29), 9 states have return successors, (33), 14 states have call predecessors, (33), 14 states have call successors, (33) [2022-11-19 07:02:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 720 transitions. [2022-11-19 07:02:29,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2022-11-19 07:02:29,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:29,877 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 24, 23, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 10, 9, 5, 5, 1, 1, 1] [2022-11-19 07:02:29,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:30,084 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:30,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -754955875, now seen corresponding path program 5 times [2022-11-19 07:02:30,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331851032] [2022-11-19 07:02:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:30,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5416 backedges. 719 proven. 244 refuted. 0 times theorem prover too weak. 4453 trivial. 0 not checked. [2022-11-19 07:02:30,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331851032] [2022-11-19 07:02:30,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331851032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:30,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869647416] [2022-11-19 07:02:30,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:02:30,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:30,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:30,651 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:30,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 07:02:30,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-19 07:02:30,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:30,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:02:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:31,074 INFO L134 CoverageAnalysis]: Checked inductivity of 5416 backedges. 1363 proven. 4 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2022-11-19 07:02:31,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5416 backedges. 542 proven. 50 refuted. 0 times theorem prover too weak. 4824 trivial. 0 not checked. [2022-11-19 07:02:31,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869647416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:31,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388448318] [2022-11-19 07:02:31,868 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:31,868 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:31,869 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:336) 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) [2022-11-19 07:02:31,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:31,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 16 [2022-11-19 07:02:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658890224] [2022-11-19 07:02:31,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:31,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:02:31,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:31,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:02:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:02:31,872 INFO L87 Difference]: Start difference. First operand 637 states and 720 transitions. Second operand has 16 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-19 07:02:32,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:32,273 INFO L93 Difference]: Finished difference Result 1086 states and 1236 transitions. [2022-11-19 07:02:32,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:02:32,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 554 [2022-11-19 07:02:32,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:32,278 INFO L225 Difference]: With dead ends: 1086 [2022-11-19 07:02:32,278 INFO L226 Difference]: Without dead ends: 650 [2022-11-19 07:02:32,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1129 GetRequests, 1103 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2022-11-19 07:02:32,280 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 128 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:32,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 194 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:02:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-11-19 07:02:32,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 639. [2022-11-19 07:02:32,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 510 states have (on average 1.0294117647058822) internal successors, (525), 504 states have internal predecessors, (525), 78 states have call successors, (78), 52 states have call predecessors, (78), 50 states have return successors, (111), 82 states have call predecessors, (111), 77 states have call successors, (111) [2022-11-19 07:02:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 714 transitions. [2022-11-19 07:02:32,323 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 714 transitions. Word has length 554 [2022-11-19 07:02:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:32,324 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 714 transitions. [2022-11-19 07:02:32,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.4) internal successors, (111), 15 states have internal predecessors, (111), 9 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-19 07:02:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 714 transitions. [2022-11-19 07:02:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-11-19 07:02:32,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:32,333 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 34, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1] [2022-11-19 07:02:32,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:32,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-19 07:02:32,540 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:32,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1709685232, now seen corresponding path program 6 times [2022-11-19 07:02:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:32,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163395626] [2022-11-19 07:02:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 729 proven. 224 refuted. 0 times theorem prover too weak. 7536 trivial. 0 not checked. [2022-11-19 07:02:33,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163395626] [2022-11-19 07:02:33,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163395626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:33,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324142818] [2022-11-19 07:02:33,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:02:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:33,067 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:33,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-19 07:02:33,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:02:33,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 07:02:33,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1248 proven. 2077 refuted. 0 times theorem prover too weak. 5164 trivial. 0 not checked. [2022-11-19 07:02:33,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1248 proven. 2146 refuted. 0 times theorem prover too weak. 5095 trivial. 0 not checked. [2022-11-19 07:02:37,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324142818] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:37,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511387154] [2022-11-19 07:02:37,873 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:37,873 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:37,873 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:336) 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) [2022-11-19 07:02:37,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:37,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 21, 31] total 39 [2022-11-19 07:02:37,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908737812] [2022-11-19 07:02:37,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:37,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-19 07:02:37,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:37,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-19 07:02:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:02:37,877 INFO L87 Difference]: Start difference. First operand 639 states and 714 transitions. Second operand has 39 states, 38 states have (on average 5.973684210526316) internal successors, (227), 38 states have internal predecessors, (227), 32 states have call successors, (39), 2 states have call predecessors, (39), 16 states have return successors, (48), 19 states have call predecessors, (48), 31 states have call successors, (48) [2022-11-19 07:02:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:39,885 INFO L93 Difference]: Finished difference Result 1130 states and 1284 transitions. [2022-11-19 07:02:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-19 07:02:39,886 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 5.973684210526316) internal successors, (227), 38 states have internal predecessors, (227), 32 states have call successors, (39), 2 states have call predecessors, (39), 16 states have return successors, (48), 19 states have call predecessors, (48), 31 states have call successors, (48) Word has length 690 [2022-11-19 07:02:39,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:39,889 INFO L225 Difference]: With dead ends: 1130 [2022-11-19 07:02:39,889 INFO L226 Difference]: Without dead ends: 520 [2022-11-19 07:02:39,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1427 GetRequests, 1338 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=772, Invalid=4928, Unknown=0, NotChecked=0, Total=5700 [2022-11-19 07:02:39,892 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 882 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:39,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 565 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 07:02:39,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-19 07:02:39,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 483. [2022-11-19 07:02:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 386 states have (on average 1.028497409326425) internal successors, (397), 381 states have internal predecessors, (397), 59 states have call successors, (59), 43 states have call predecessors, (59), 37 states have return successors, (70), 58 states have call predecessors, (70), 58 states have call successors, (70) [2022-11-19 07:02:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 526 transitions. [2022-11-19 07:02:39,921 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 526 transitions. Word has length 690 [2022-11-19 07:02:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:39,922 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 526 transitions. [2022-11-19 07:02:39,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 5.973684210526316) internal successors, (227), 38 states have internal predecessors, (227), 32 states have call successors, (39), 2 states have call predecessors, (39), 16 states have return successors, (48), 19 states have call predecessors, (48), 31 states have call successors, (48) [2022-11-19 07:02:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 526 transitions. [2022-11-19 07:02:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2022-11-19 07:02:39,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:39,929 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 26, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 10, 10, 7, 6, 1, 1, 1] [2022-11-19 07:02:39,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:40,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-19 07:02:40,136 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:40,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1202538386, now seen corresponding path program 7 times [2022-11-19 07:02:40,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733533320] [2022-11-19 07:02:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:40,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 7067 backedges. 884 proven. 225 refuted. 0 times theorem prover too weak. 5958 trivial. 0 not checked. [2022-11-19 07:02:40,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733533320] [2022-11-19 07:02:40,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733533320] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368963404] [2022-11-19 07:02:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:02:40,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:40,709 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:40,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-19 07:02:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:02:41,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7067 backedges. 884 proven. 225 refuted. 0 times theorem prover too weak. 5958 trivial. 0 not checked. [2022-11-19 07:02:41,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7067 backedges. 888 proven. 228 refuted. 0 times theorem prover too weak. 5951 trivial. 0 not checked. [2022-11-19 07:02:42,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368963404] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:42,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [373550985] [2022-11-19 07:02:42,416 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:42,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:42,416 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:336) 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) [2022-11-19 07:02:42,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:42,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 15 [2022-11-19 07:02:42,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547870650] [2022-11-19 07:02:42,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:42,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 07:02:42,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 07:02:42,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:02:42,420 INFO L87 Difference]: Start difference. First operand 483 states and 526 transitions. Second operand has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 10 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 07:02:42,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:42,655 INFO L93 Difference]: Finished difference Result 505 states and 548 transitions. [2022-11-19 07:02:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:02:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 10 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) Word has length 631 [2022-11-19 07:02:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:42,658 INFO L225 Difference]: With dead ends: 505 [2022-11-19 07:02:42,658 INFO L226 Difference]: Without dead ends: 475 [2022-11-19 07:02:42,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1279 GetRequests, 1254 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2022-11-19 07:02:42,659 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 81 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:42,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 159 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:02:42,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-19 07:02:42,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-11-19 07:02:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 380 states have (on average 1.0263157894736843) internal successors, (390), 375 states have internal predecessors, (390), 58 states have call successors, (58), 42 states have call predecessors, (58), 36 states have return successors, (68), 57 states have call predecessors, (68), 57 states have call successors, (68) [2022-11-19 07:02:42,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 516 transitions. [2022-11-19 07:02:42,684 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 516 transitions. Word has length 631 [2022-11-19 07:02:42,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:42,684 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 516 transitions. [2022-11-19 07:02:42,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 10 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (16), 8 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 07:02:42,685 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 516 transitions. [2022-11-19 07:02:42,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 691 [2022-11-19 07:02:42,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:42,691 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 34, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 12, 10, 7, 7, 1, 1, 1] [2022-11-19 07:02:42,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:42,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:42,899 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:42,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1096025600, now seen corresponding path program 8 times [2022-11-19 07:02:42,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:42,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955812043] [2022-11-19 07:02:42,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:42,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 997 proven. 374 refuted. 0 times theorem prover too weak. 7118 trivial. 0 not checked. [2022-11-19 07:02:43,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955812043] [2022-11-19 07:02:43,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955812043] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:43,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807016564] [2022-11-19 07:02:43,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:02:43,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:43,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:43,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:43,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 07:02:44,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-19 07:02:44,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:44,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:02:44,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:44,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1625 proven. 192 refuted. 0 times theorem prover too weak. 6672 trivial. 0 not checked. [2022-11-19 07:02:44,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8489 backedges. 1625 proven. 199 refuted. 0 times theorem prover too weak. 6665 trivial. 0 not checked. [2022-11-19 07:02:45,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807016564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:45,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113035304] [2022-11-19 07:02:45,970 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:45,970 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:45,970 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:336) 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) [2022-11-19 07:02:45,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:45,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 28 [2022-11-19 07:02:45,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301482883] [2022-11-19 07:02:45,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:45,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 07:02:45,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 07:02:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2022-11-19 07:02:45,973 INFO L87 Difference]: Start difference. First operand 475 states and 516 transitions. Second operand has 28 states, 27 states have (on average 6.037037037037037) internal successors, (163), 27 states have internal predecessors, (163), 16 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (32), 19 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-19 07:02:46,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:46,877 INFO L93 Difference]: Finished difference Result 515 states and 560 transitions. [2022-11-19 07:02:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:02:46,879 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.037037037037037) internal successors, (163), 27 states have internal predecessors, (163), 16 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (32), 19 states have call predecessors, (32), 15 states have call successors, (32) Word has length 690 [2022-11-19 07:02:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:46,882 INFO L225 Difference]: With dead ends: 515 [2022-11-19 07:02:46,882 INFO L226 Difference]: Without dead ends: 498 [2022-11-19 07:02:46,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1412 GetRequests, 1360 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:02:46,883 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 216 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:46,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 390 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:02:46,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-11-19 07:02:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 480. [2022-11-19 07:02:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 384 states have (on average 1.0260416666666667) internal successors, (394), 379 states have internal predecessors, (394), 58 states have call successors, (58), 42 states have call predecessors, (58), 37 states have return successors, (68), 58 states have call predecessors, (68), 57 states have call successors, (68) [2022-11-19 07:02:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 520 transitions. [2022-11-19 07:02:46,910 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 520 transitions. Word has length 690 [2022-11-19 07:02:46,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:46,910 INFO L495 AbstractCegarLoop]: Abstraction has 480 states and 520 transitions. [2022-11-19 07:02:46,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.037037037037037) internal successors, (163), 27 states have internal predecessors, (163), 16 states have call successors, (30), 2 states have call predecessors, (30), 10 states have return successors, (32), 19 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-19 07:02:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 520 transitions. [2022-11-19 07:02:46,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2022-11-19 07:02:46,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:46,917 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 11, 10, 7, 7, 1, 1, 1] [2022-11-19 07:02:46,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:47,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:47,124 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:47,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:47,125 INFO L85 PathProgramCache]: Analyzing trace with hash -203856021, now seen corresponding path program 9 times [2022-11-19 07:02:47,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:47,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63558705] [2022-11-19 07:02:47,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:47,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7989 backedges. 1093 proven. 485 refuted. 0 times theorem prover too weak. 6411 trivial. 0 not checked. [2022-11-19 07:02:47,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63558705] [2022-11-19 07:02:47,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63558705] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:47,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307328398] [2022-11-19 07:02:47,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:02:47,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:47,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:47,835 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:47,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-19 07:02:48,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:02:48,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:48,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 07:02:48,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7989 backedges. 1089 proven. 1917 refuted. 0 times theorem prover too weak. 4983 trivial. 0 not checked. [2022-11-19 07:02:48,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7989 backedges. 1093 proven. 1971 refuted. 0 times theorem prover too weak. 4925 trivial. 0 not checked. [2022-11-19 07:02:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307328398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921236601] [2022-11-19 07:02:52,064 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:52,064 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:52,064 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:336) 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) [2022-11-19 07:02:52,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:52,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 29] total 38 [2022-11-19 07:02:52,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529537469] [2022-11-19 07:02:52,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:52,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 07:02:52,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 07:02:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1258, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 07:02:52,069 INFO L87 Difference]: Start difference. First operand 480 states and 520 transitions. Second operand has 38 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 29 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (43), 17 states have call predecessors, (43), 28 states have call successors, (43) [2022-11-19 07:02:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:53,520 INFO L93 Difference]: Finished difference Result 737 states and 796 transitions. [2022-11-19 07:02:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-19 07:02:53,520 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 29 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (43), 17 states have call predecessors, (43), 28 states have call successors, (43) Word has length 670 [2022-11-19 07:02:53,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:53,523 INFO L225 Difference]: With dead ends: 737 [2022-11-19 07:02:53,523 INFO L226 Difference]: Without dead ends: 480 [2022-11-19 07:02:53,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1387 GetRequests, 1306 SyntacticMatches, 14 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=693, Invalid=3999, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 07:02:53,525 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 447 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 1870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:53,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [447 Valid, 517 Invalid, 1870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:02:53,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-11-19 07:02:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 475. [2022-11-19 07:02:53,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 380 states have (on average 1.0263157894736843) internal successors, (390), 375 states have internal predecessors, (390), 58 states have call successors, (58), 42 states have call predecessors, (58), 36 states have return successors, (66), 57 states have call predecessors, (66), 57 states have call successors, (66) [2022-11-19 07:02:53,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 514 transitions. [2022-11-19 07:02:53,551 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 514 transitions. Word has length 670 [2022-11-19 07:02:53,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:53,551 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 514 transitions. [2022-11-19 07:02:53,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 29 states have call successors, (37), 2 states have call predecessors, (37), 14 states have return successors, (43), 17 states have call predecessors, (43), 28 states have call successors, (43) [2022-11-19 07:02:53,552 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 514 transitions. [2022-11-19 07:02:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-11-19 07:02:53,558 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:53,558 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 28, 28, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 11, 11, 7, 6, 1, 1, 1] [2022-11-19 07:02:53,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:53,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-19 07:02:53,766 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash 450267156, now seen corresponding path program 10 times [2022-11-19 07:02:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764527616] [2022-11-19 07:02:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:53,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8016 backedges. 1118 proven. 463 refuted. 0 times theorem prover too weak. 6435 trivial. 0 not checked. [2022-11-19 07:02:54,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:02:54,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764527616] [2022-11-19 07:02:54,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764527616] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:54,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271319980] [2022-11-19 07:02:54,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:02:54,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:54,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:54,455 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:54,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-19 07:02:55,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:55,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:02:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 8016 backedges. 1199 proven. 487 refuted. 0 times theorem prover too weak. 6330 trivial. 0 not checked. [2022-11-19 07:02:55,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:56,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8016 backedges. 1203 proven. 505 refuted. 0 times theorem prover too weak. 6308 trivial. 0 not checked. [2022-11-19 07:02:56,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271319980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:56,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285373462] [2022-11-19 07:02:56,960 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:02:56,960 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:02:56,961 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:336) 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) [2022-11-19 07:02:56,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:02:56,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 17] total 22 [2022-11-19 07:02:56,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825133761] [2022-11-19 07:02:56,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:56,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:02:56,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:02:56,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:02:56,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:02:56,963 INFO L87 Difference]: Start difference. First operand 475 states and 514 transitions. Second operand has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-19 07:02:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:57,391 INFO L93 Difference]: Finished difference Result 501 states and 541 transitions. [2022-11-19 07:02:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:02:57,391 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) Word has length 671 [2022-11-19 07:02:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:57,394 INFO L225 Difference]: With dead ends: 501 [2022-11-19 07:02:57,394 INFO L226 Difference]: Without dead ends: 471 [2022-11-19 07:02:57,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1369 GetRequests, 1329 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 07:02:57,395 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 99 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:57,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 357 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:02:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-11-19 07:02:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 471. [2022-11-19 07:02:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 377 states have (on average 1.026525198938992) internal successors, (387), 372 states have internal predecessors, (387), 57 states have call successors, (57), 42 states have call predecessors, (57), 36 states have return successors, (63), 56 states have call predecessors, (63), 56 states have call successors, (63) [2022-11-19 07:02:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 507 transitions. [2022-11-19 07:02:57,426 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 507 transitions. Word has length 671 [2022-11-19 07:02:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:57,427 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 507 transitions. [2022-11-19 07:02:57,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.9523809523809526) internal successors, (125), 21 states have internal predecessors, (125), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-19 07:02:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 507 transitions. [2022-11-19 07:02:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-11-19 07:02:57,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:57,435 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 32, 27, 27, 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, 16, 11, 10, 7, 6, 1, 1, 1] [2022-11-19 07:02:57,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:57,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-19 07:02:57,643 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-19 07:02:57,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:57,644 INFO L85 PathProgramCache]: Analyzing trace with hash 961130901, now seen corresponding path program 11 times [2022-11-19 07:02:57,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:02:57,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211419076] [2022-11-19 07:02:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:57,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:02:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:03:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 1257 proven. 1884 refuted. 0 times theorem prover too weak. 4397 trivial. 0 not checked. [2022-11-19 07:03:05,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:03:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211419076] [2022-11-19 07:03:05,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211419076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:03:05,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988441033] [2022-11-19 07:03:05,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:03:05,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:03:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:03:05,098 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:03:05,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 07:03:05,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-19 07:03:05,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:03:05,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1230 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-19 07:03:05,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:03:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 1237 proven. 1424 refuted. 0 times theorem prover too weak. 4877 trivial. 0 not checked. [2022-11-19 07:03:06,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:03:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7538 backedges. 1543 proven. 1300 refuted. 0 times theorem prover too weak. 4695 trivial. 0 not checked. [2022-11-19 07:03:24,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988441033] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:03:24,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [517381735] [2022-11-19 07:03:24,993 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 07:03:24,993 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:03:24,993 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:336) 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) [2022-11-19 07:03:24,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:03:24,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36, 46] total 79 [2022-11-19 07:03:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540481913] [2022-11-19 07:03:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:03:24,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-19 07:03:24,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:03:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-19 07:03:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=5582, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 07:03:24,999 INFO L87 Difference]: Start difference. First operand 471 states and 507 transitions. Second operand has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 80 states have internal predecessors, (203), 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) [2022-11-19 07:03:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:03:25,473 INFO L93 Difference]: Finished difference Result 499 states and 537 transitions. [2022-11-19 07:03:25,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-19 07:03:25,479 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 80 states have internal predecessors, (203), 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 651 [2022-11-19 07:03:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:03:25,480 INFO L225 Difference]: With dead ends: 499 [2022-11-19 07:03:25,480 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:03:25,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1263 SyntacticMatches, 92 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9881 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=891, Invalid=6591, Unknown=0, NotChecked=0, Total=7482 [2022-11-19 07:03:25,486 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 75 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:03:25,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 642 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:03:25,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:03:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:03:25,490 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) [2022-11-19 07:03:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:03:25,491 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 651 [2022-11-19 07:03:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:03:25,491 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:03:25,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.569620253164557) internal successors, (203), 80 states have internal predecessors, (203), 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) [2022-11-19 07:03:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:03:25,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:03:25,494 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2022-11-19 07:03:25,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2022-11-19 07:03:25,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2022-11-19 07:03:25,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2022-11-19 07:03:25,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2022-11-19 07:03:25,496 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2022-11-19 07:03:25,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2022-11-19 07:03:25,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2022-11-19 07:03:25,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2022-11-19 07:03:25,497 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2022-11-19 07:03:25,498 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2022-11-19 07:03:25,498 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2022-11-19 07:03:25,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-19 07:03:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-19 07:03:25,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 07:03:40,695 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 07:03:40,695 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 07:03:40,695 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)) [2022-11-19 07:03:40,696 INFO L895 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 8) [2022-11-19 07:03:40,696 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-11-19 07:03:40,696 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,696 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,696 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,696 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,696 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (or (and (<= |fibo2_#in~n| fibo2_~n) (<= fibo2_~n |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 7))) (or (< 1 fibo2_~n) (not (<= |fibo2_#in~n| 4)))) [2022-11-19 07:03:40,696 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,697 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,697 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,697 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (let ((.cse4 (<= fibo2_~n |fibo2_#in~n|)) (.cse0 (<= 5 |fibo2_#in~n|)) (.cse1 (<= 7 |fibo2_#in~n|)) (.cse2 (<= 3 |fibo2_#t~ret6|)) (.cse3 (<= |fibo2_#in~n| fibo2_~n))) (and (or (and (<= |fibo2_#t~ret6| 1) (< 1 |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 3))) (or (not .cse0) .cse1 (and (<= |fibo2_#t~ret6| 5) .cse2 .cse3 .cse4)) (let ((.cse5 (<= |fibo2_#t~ret6| 3)) (.cse6 (<= 1 |fibo2_#t~ret6|)) (.cse7 (<= fibo2_~n 5))) (or (not (<= |fibo2_#in~n| 5)) (and .cse5 .cse3 (<= |fibo2_#t~ret6| 2) .cse6 .cse4 .cse7) (and .cse0 .cse5 .cse3 .cse6 .cse7))) (or (not (<= |fibo2_#in~n| 7)) (not .cse1) (and .cse2 (<= |fibo2_#t~ret6| 8) .cse3 (<= fibo2_~n 7))))) [2022-11-19 07:03:40,697 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,697 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,698 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,698 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,698 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,698 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-11-19 07:03:40,698 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,699 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,700 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,700 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,700 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 (or .cse0 (not (<= |fibo1_#in~n| 6))) (or .cse0 (not (<= |fibo1_#in~n| 8)) (not (<= 8 |fibo1_#in~n|))) (not (<= |fibo1_#in~n| 1)))) [2022-11-19 07:03:40,700 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,701 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,701 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,701 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-11-19 07:03:40,701 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,702 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse3 (<= 2 |fibo1_#t~ret4|)) (.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse2 (<= |fibo1_#in~n| 4)) (.cse1 (<= |fibo1_#in~n| fibo1_~n))) (and (or (not (<= |fibo1_#in~n| 8)) (and .cse0 (<= 1 |fibo1_#t~ret4|) .cse1 (< |fibo1_#t~ret4| 2147483629)) (not (<= 8 |fibo1_#in~n|))) (or (not .cse2) (<= |fibo1_#in~n| 3) (and .cse3 (<= |fibo1_#t~ret4| 2))) (or (< 1 fibo1_~n) (not (<= |fibo1_#in~n| 2))) (or (and .cse0 (<= |fibo1_#t~ret4| 5) .cse3 (<= 6 fibo1_~n)) (and .cse0 (<= 4 fibo1_~n) (<= |fibo1_#t~ret4| 3) .cse1 .cse3) (and .cse0 (= |fibo1_#t~ret4| 1) .cse2 .cse1) (not (<= |fibo1_#in~n| 6))))) [2022-11-19 07:03:40,702 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,702 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,702 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,702 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,703 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-11-19 07:03:40,703 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,703 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-19 07:03:40,703 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-11-19 07:03:40,703 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-11-19 07:03:40,703 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-11-19 07:03:40,707 INFO L444 BasicCegarLoop]: Path program histogram: [11, 7, 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] [2022-11-19 07:03:40,710 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:03:40,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:03:40 BoogieIcfgContainer [2022-11-19 07:03:40,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:03:40,727 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:03:40,727 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:03:40,728 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:03:40,728 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:01:05" (3/4) ... [2022-11-19 07:03:40,732 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 07:03:40,739 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-11-19 07:03:40,739 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-11-19 07:03:40,744 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-19 07:03:40,745 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-19 07:03:40,745 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 07:03:40,745 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:03:40,784 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:03:40,784 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:03:40,784 INFO L158 Benchmark]: Toolchain (without parser) took 155921.13ms. Allocated memory was 140.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 109.2MB in the beginning and 775.3MB in the end (delta: -666.1MB). Peak memory consumption was 494.5MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,785 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 47.2MB in the beginning and 47.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:03:40,785 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.96ms. Allocated memory is still 140.5MB. Free memory was 109.0MB in the beginning and 118.0MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,785 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.24ms. Allocated memory is still 140.5MB. Free memory was 118.0MB in the beginning and 116.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,785 INFO L158 Benchmark]: Boogie Preprocessor took 42.95ms. Allocated memory is still 140.5MB. Free memory was 116.4MB in the beginning and 115.4MB in the end (delta: 990.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:03:40,786 INFO L158 Benchmark]: RCFGBuilder took 400.31ms. Allocated memory is still 140.5MB. Free memory was 115.4MB in the beginning and 103.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,786 INFO L158 Benchmark]: TraceAbstraction took 155001.70ms. Allocated memory was 140.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 102.9MB in the beginning and 777.4MB in the end (delta: -674.5MB). Peak memory consumption was 797.1MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,787 INFO L158 Benchmark]: Witness Printer took 56.79ms. Allocated memory is still 1.3GB. Free memory was 777.4MB in the beginning and 775.3MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 07:03:40,796 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 92.3MB. Free memory was 47.2MB in the beginning and 47.1MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.96ms. Allocated memory is still 140.5MB. Free memory was 109.0MB in the beginning and 118.0MB in the end (delta: -9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.24ms. Allocated memory is still 140.5MB. Free memory was 118.0MB in the beginning and 116.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 42.95ms. Allocated memory is still 140.5MB. Free memory was 116.4MB in the beginning and 115.4MB in the end (delta: 990.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 400.31ms. Allocated memory is still 140.5MB. Free memory was 115.4MB in the beginning and 103.3MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 155001.70ms. Allocated memory was 140.5MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 102.9MB in the beginning and 777.4MB in the end (delta: -674.5MB). Peak memory consumption was 797.1MB. Max. memory is 16.1GB. * Witness Printer took 56.79ms. Allocated memory is still 1.3GB. Free memory was 777.4MB in the beginning and 775.3MB in the end (delta: 2.1MB). 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: 154.8s, OverallIterations: 49, TraceHistogramMax: 36, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.2s, AutomataDifference: 33.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 15.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8018 SdHoareTripleChecker+Valid, 18.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7810 mSDsluCounter, 16741 SdHoareTripleChecker+Invalid, 15.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 14716 mSDsCounter, 3537 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30426 IncrementalHoareTripleChecker+Invalid, 33963 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3537 mSolverCounterUnsat, 2025 mSDtfsCounter, 30426 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19861 GetRequests, 17861 SyntacticMatches, 423 SemanticMatches, 1577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41911 ImplicationChecksByTransitivity, 27.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1295occurred in iteration=36, InterpolantAutomatonStates: 1110, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 49 MinimizatonAttempts, 3211 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 4298 PreInvPairs, 7860 NumberOfFragments, 255 HoareAnnotationTreeSize, 4298 FomulaSimplifications, 266781 FormulaSimplificationTreeSizeReduction, 11.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 64517 FormulaSimplificationTreeSizeReductionInter, 3.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 87.8s InterpolantComputationTime, 19159 NumberOfCodeBlocks, 16822 NumberOfCodeBlocksAsserted, 143 NumberOfCheckSat, 28091 ConstructedInterpolants, 0 QuantifiedInterpolants, 47217 SizeOfPredicates, 155 NumberOfNonLiveVariables, 14129 ConjunctsInSsa, 741 ConjunctsInUnsatCore, 119 InterpolantComputations, 17 PerfectInterpolantSequences, 195080/221046 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: x <= 8 RESULT: Ultimate proved your program to be correct! [2022-11-19 07:03:40,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1fbdd6be-bf0e-48ae-ba2a-3bd53488b69f/bin/utaipan-I9t0OCRTmS/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