./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_10-1.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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_10-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/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 acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 --- 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 07:57:56,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:57:56,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:57:56,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:57:56,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:57:56,433 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:57:56,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:57:56,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:57:56,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:57:56,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:57:56,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:57:56,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:57:56,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:57:56,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:57:56,445 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:57:56,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:57:56,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:57:56,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:57:56,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:57:56,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:57:56,454 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:57:56,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:57:56,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:57:56,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:57:56,462 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:57:56,462 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:57:56,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:57:56,464 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:57:56,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:57:56,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:57:56,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:57:56,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:57:56,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:57:56,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:57:56,471 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:57:56,471 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:57:56,472 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:57:56,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:57:56,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:57:56,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:57:56,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:57:56,475 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-19 07:57:56,498 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:57:56,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:57:56,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:57:56,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:57:56,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:57:56,500 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:57:56,501 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:57:56,501 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:57:56,501 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:57:56,501 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:57:56,501 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:57:56,502 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:57:56,502 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:57:56,502 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:57:56,502 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:57:56,503 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:57:56,503 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:57:56,503 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:57:56,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:57:56,504 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:57:56,504 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:57:56,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:57:56,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:57:56,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:57:56,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:57:56,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:57:56,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:57:56,506 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-19 07:57:56,506 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:57:56,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:57:56,507 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:57:56,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:57:56,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:57:56,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:57:56,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:56,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:57:56,508 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:57:56,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:57:56,508 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:57:56,509 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:57:56,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:57:56,509 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:57:56,509 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:57:56,509 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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 [2022-11-19 07:57:56,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:57:56,812 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:57:56,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:57:56,818 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:57:56,819 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:57:56,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-11-19 07:57:56,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/data/fac49a524/b70da9e221f94eb68f89fdefe526e8b5/FLAGe85189011 [2022-11-19 07:57:57,478 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:57:57,478 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-11-19 07:57:57,486 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/data/fac49a524/b70da9e221f94eb68f89fdefe526e8b5/FLAGe85189011 [2022-11-19 07:57:57,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/data/fac49a524/b70da9e221f94eb68f89fdefe526e8b5 [2022-11-19 07:57:57,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:57:57,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:57:57,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:57,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:57:57,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:57:57,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:57" (1/1) ... [2022-11-19 07:57:57,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c22dae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:57, skipping insertion in model container [2022-11-19 07:57:57,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:57:57" (1/1) ... [2022-11-19 07:57:57,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:57:57,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:57:58,063 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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2022-11-19 07:57:58,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:58,073 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:57:58,088 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_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/sv-benchmarks/c/recursive-simple/fibo_10-1.c[743,756] [2022-11-19 07:57:58,088 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:57:58,102 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:57:58,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58 WrapperNode [2022-11-19 07:57:58,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:57:58,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:58,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:57:58,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:57:58,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,123 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,140 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-19 07:57:58,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:57:58,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:57:58,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:57:58,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:57:58,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,167 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:57:58,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:57:58,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:57:58,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:57:58,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (1/1) ... [2022-11-19 07:57:58,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:57:58,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:57:58,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:57:58,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:57:58,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:57:58,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:57:58,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:57:58,250 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:57:58,250 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-11-19 07:57:58,250 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-11-19 07:57:58,331 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:57:58,333 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:57:58,542 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:57:58,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:57:58,567 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 07:57:58,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:58 BoogieIcfgContainer [2022-11-19 07:57:58,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:57:58,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:57:58,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:57:58,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:57:58,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:57:57" (1/3) ... [2022-11-19 07:57:58,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2614f406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:58, skipping insertion in model container [2022-11-19 07:57:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:57:58" (2/3) ... [2022-11-19 07:57:58,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2614f406 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:57:58, skipping insertion in model container [2022-11-19 07:57:58,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:58" (3/3) ... [2022-11-19 07:57:58,589 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_10-1.c [2022-11-19 07:57:58,617 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:57:58,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-19 07:57:58,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:57:58,714 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;@c013515, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:57:58,714 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-19 07:57:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:57:58,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:57:58,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:58,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:57:58,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:57:58,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:58,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1907138082, now seen corresponding path program 1 times [2022-11-19 07:57:58,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:58,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577488750] [2022-11-19 07:57:58,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:58,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:59,113 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 07:57:59,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577488750] [2022-11-19 07:57:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577488750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:59,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:59,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:57:59,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618102609] [2022-11-19 07:57:59,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:59,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:57:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:57:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:57:59,171 INFO L87 Difference]: Start difference. First operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:59,340 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-19 07:57:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:57:59,344 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 07:57:59,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:59,363 INFO L225 Difference]: With dead ends: 25 [2022-11-19 07:57:59,371 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:57:59,375 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 07:57:59,379 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:59,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 17 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:57:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-19 07:57:59,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:59,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-19 07:57:59,440 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-11-19 07:57:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:59,441 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-19 07:57:59,442 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 07:57:59,442 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-19 07:57:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:57:59,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:59,446 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:57:59,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:57:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:59,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1008261661, now seen corresponding path program 1 times [2022-11-19 07:57:59,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:59,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113976493] [2022-11-19 07:57:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:59,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:59,508 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 07:57:59,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113976493] [2022-11-19 07:57:59,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113976493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:59,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:59,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:57:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737638269] [2022-11-19 07:57:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:59,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:57:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:57:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:57:59,512 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:57:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:59,545 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2022-11-19 07:57:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:57:59,546 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 07:57:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:59,548 INFO L225 Difference]: With dead ends: 23 [2022-11-19 07:57:59,549 INFO L226 Difference]: Without dead ends: 21 [2022-11-19 07:57:59,549 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 07:57:59,551 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 18 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 07:57:59,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 18 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:57:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-19 07:57:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2022-11-19 07:57:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-19 07:57:59,560 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-11-19 07:57:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:59,561 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-19 07:57:59,561 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 07:57:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-19 07:57:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:57:59,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:59,563 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:59,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:57:59,563 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:57:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:59,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1283862660, now seen corresponding path program 1 times [2022-11-19 07:57:59,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:59,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944501259] [2022-11-19 07:57:59,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:59,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:57:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:57:59,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:57:59,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944501259] [2022-11-19 07:57:59,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944501259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:57:59,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:57:59,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:57:59,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881043633] [2022-11-19 07:57:59,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:57:59,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:57:59,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:57:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:57:59,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:57:59,783 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:57:59,857 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-19 07:57:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:57:59,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-19 07:57:59,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:57:59,860 INFO L225 Difference]: With dead ends: 35 [2022-11-19 07:57:59,861 INFO L226 Difference]: Without dead ends: 33 [2022-11-19 07:57:59,861 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 07:57:59,864 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:57:59,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:57:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-19 07:57:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-19 07:57:59,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 07:57:59,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-19 07:57:59,886 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2022-11-19 07:57:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:57:59,887 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-19 07:57:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:57:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-19 07:57:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:57:59,890 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:57:59,891 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:57:59,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:57:59,891 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:57:59,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:57:59,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1156874401, now seen corresponding path program 1 times [2022-11-19 07:57:59,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:57:59,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804110653] [2022-11-19 07:57:59,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:57:59,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:57:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:58:00,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:00,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804110653] [2022-11-19 07:58:00,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804110653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:00,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678429524] [2022-11-19 07:58:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:00,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:00,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:00,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:00,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:58:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:00,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:58:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:00,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:00,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678429524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:00,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [16780996] [2022-11-19 07:58:00,570 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-19 07:58:00,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:00,576 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 07:58:00,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:00,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-19 07:58:00,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112518430] [2022-11-19 07:58:00,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:00,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 07:58:00,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 07:58:00,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:58:00,593 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:58:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:01,219 INFO L93 Difference]: Finished difference Result 177 states and 247 transitions. [2022-11-19 07:58:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 07:58:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-11-19 07:58:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:01,223 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:58:01,223 INFO L226 Difference]: Without dead ends: 144 [2022-11-19 07:58:01,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:58:01,225 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 203 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:01,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 233 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:58:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-19 07:58:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2022-11-19 07:58:01,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 101 states have internal predecessors, (110), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (46), 21 states have call predecessors, (46), 16 states have call successors, (46) [2022-11-19 07:58:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2022-11-19 07:58:01,254 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 29 [2022-11-19 07:58:01,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:01,255 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2022-11-19 07:58:01,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 15 states have internal predecessors, (53), 9 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 07:58:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2022-11-19 07:58:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 07:58:01,257 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:01,257 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:01,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:01,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:01,464 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:01,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:01,465 INFO L85 PathProgramCache]: Analyzing trace with hash -969835265, now seen corresponding path program 2 times [2022-11-19 07:58:01,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:01,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491411538] [2022-11-19 07:58:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:58:01,608 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:01,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491411538] [2022-11-19 07:58:01,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491411538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:01,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129496841] [2022-11-19 07:58:01,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:01,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:01,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:01,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:58:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 07:58:01,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 07:58:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:01,721 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:58:01,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:58:01,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129496841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:01,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:58:01,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-19 07:58:01,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755117248] [2022-11-19 07:58:01,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:01,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:58:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:58:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:58:01,724 INFO L87 Difference]: Start difference. First operand 128 states and 173 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:58:01,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:01,766 INFO L93 Difference]: Finished difference Result 142 states and 189 transitions. [2022-11-19 07:58:01,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:58:01,769 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), 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 07:58:01,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:01,772 INFO L225 Difference]: With dead ends: 142 [2022-11-19 07:58:01,772 INFO L226 Difference]: Without dead ends: 141 [2022-11-19 07:58:01,773 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 07:58:01,774 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 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 07:58:01,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:58:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-11-19 07:58:01,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 132. [2022-11-19 07:58:01,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.1067961165048543) internal successors, (114), 103 states have internal predecessors, (114), 17 states have call successors, (17), 5 states have call predecessors, (17), 10 states have return successors, (46), 23 states have call predecessors, (46), 16 states have call successors, (46) [2022-11-19 07:58:01,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 177 transitions. [2022-11-19 07:58:01,820 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 177 transitions. Word has length 41 [2022-11-19 07:58:01,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 177 transitions. [2022-11-19 07:58:01,822 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:58:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 177 transitions. [2022-11-19 07:58:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 07:58:01,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:01,825 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:01,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:58:02,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:02,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:02,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:02,027 INFO L85 PathProgramCache]: Analyzing trace with hash -122072, now seen corresponding path program 1 times [2022-11-19 07:58:02,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:02,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898319309] [2022-11-19 07:58:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:02,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:02,134 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-19 07:58:02,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:02,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898319309] [2022-11-19 07:58:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898319309] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095914792] [2022-11-19 07:58:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:02,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:02,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:02,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:02,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:58:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:02,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:58:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:58:02,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:58:02,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095914792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1972380031] [2022-11-19 07:58:02,899 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:02,899 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:02,900 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 07:58:02,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:02,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 27 [2022-11-19 07:58:02,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875056061] [2022-11-19 07:58:02,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:02,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 07:58:02,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:02,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 07:58:02,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-11-19 07:58:02,903 INFO L87 Difference]: Start difference. First operand 132 states and 177 transitions. Second operand has 27 states, 25 states have (on average 3.04) internal successors, (76), 19 states have internal predecessors, (76), 13 states have call successors, (15), 10 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 07:58:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:04,139 INFO L93 Difference]: Finished difference Result 449 states and 681 transitions. [2022-11-19 07:58:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-19 07:58:04,139 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.04) internal successors, (76), 19 states have internal predecessors, (76), 13 states have call successors, (15), 10 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 07:58:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:04,143 INFO L225 Difference]: With dead ends: 449 [2022-11-19 07:58:04,143 INFO L226 Difference]: Without dead ends: 331 [2022-11-19 07:58:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=324, Invalid=1568, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 07:58:04,150 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 331 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:04,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 530 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:58:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-11-19 07:58:04,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 294. [2022-11-19 07:58:04,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 231 states have (on average 1.0995670995670996) internal successors, (254), 231 states have internal predecessors, (254), 37 states have call successors, (37), 11 states have call predecessors, (37), 24 states have return successors, (109), 51 states have call predecessors, (109), 36 states have call successors, (109) [2022-11-19 07:58:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 400 transitions. [2022-11-19 07:58:04,192 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 400 transitions. Word has length 42 [2022-11-19 07:58:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:04,193 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 400 transitions. [2022-11-19 07:58:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.04) internal successors, (76), 19 states have internal predecessors, (76), 13 states have call successors, (15), 10 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 07:58:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 400 transitions. [2022-11-19 07:58:04,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-19 07:58:04,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:04,195 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 10, 10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:04,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:58:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 07:58:04,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1221687734, now seen corresponding path program 1 times [2022-11-19 07:58:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:04,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805690760] [2022-11-19 07:58:04,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:04,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-11-19 07:58:04,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:04,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805690760] [2022-11-19 07:58:04,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805690760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:58:04,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:58:04,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:58:04,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769280882] [2022-11-19 07:58:04,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:58:04,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:58:04,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:04,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:58:04,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:58:04,603 INFO L87 Difference]: Start difference. First operand 294 states and 400 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:58:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:04,681 INFO L93 Difference]: Finished difference Result 311 states and 423 transitions. [2022-11-19 07:58:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:58:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-11-19 07:58:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:04,692 INFO L225 Difference]: With dead ends: 311 [2022-11-19 07:58:04,692 INFO L226 Difference]: Without dead ends: 309 [2022-11-19 07:58:04,693 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 07:58:04,694 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:04,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 91 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-11-19 07:58:04,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 301. [2022-11-19 07:58:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 237 states have (on average 1.0970464135021096) internal successors, (260), 236 states have internal predecessors, (260), 38 states have call successors, (38), 11 states have call predecessors, (38), 24 states have return successors, (115), 53 states have call predecessors, (115), 37 states have call successors, (115) [2022-11-19 07:58:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 413 transitions. [2022-11-19 07:58:04,750 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 413 transitions. Word has length 78 [2022-11-19 07:58:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:04,752 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 413 transitions. [2022-11-19 07:58:04,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:58:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 413 transitions. [2022-11-19 07:58:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-19 07:58:04,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:04,769 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 11, 11, 11, 11, 5, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:04,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:58:04,770 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:04,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1402077390, now seen corresponding path program 1 times [2022-11-19 07:58:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:04,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834111993] [2022-11-19 07:58:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:04,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2022-11-19 07:58:04,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834111993] [2022-11-19 07:58:04,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834111993] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:04,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388183915] [2022-11-19 07:58:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:04,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:04,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:04,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:58:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:05,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:58:05,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 434 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-19 07:58:05,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 279 proven. 175 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-19 07:58:05,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388183915] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:05,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240892822] [2022-11-19 07:58:05,820 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:05,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:05,821 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 07:58:05,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:05,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 23, 23] total 26 [2022-11-19 07:58:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724013471] [2022-11-19 07:58:05,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:05,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:58:05,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:05,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:58:05,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:58:05,824 INFO L87 Difference]: Start difference. First operand 301 states and 413 transitions. Second operand has 26 states, 25 states have (on average 3.52) internal successors, (88), 16 states have internal predecessors, (88), 13 states have call successors, (19), 12 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:58:06,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:06,651 INFO L93 Difference]: Finished difference Result 584 states and 833 transitions. [2022-11-19 07:58:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:58:06,652 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 16 states have internal predecessors, (88), 13 states have call successors, (19), 12 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 106 [2022-11-19 07:58:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:06,656 INFO L225 Difference]: With dead ends: 584 [2022-11-19 07:58:06,656 INFO L226 Difference]: Without dead ends: 297 [2022-11-19 07:58:06,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 177 SyntacticMatches, 21 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=442, Invalid=1118, Unknown=0, NotChecked=0, Total=1560 [2022-11-19 07:58:06,661 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 386 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:06,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 140 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:58:06,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-19 07:58:06,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 272. [2022-11-19 07:58:06,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 213 states have (on average 1.0985915492957747) internal successors, (234), 215 states have internal predecessors, (234), 34 states have call successors, (34), 12 states have call predecessors, (34), 23 states have return successors, (69), 44 states have call predecessors, (69), 33 states have call successors, (69) [2022-11-19 07:58:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 337 transitions. [2022-11-19 07:58:06,688 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 337 transitions. Word has length 106 [2022-11-19 07:58:06,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:06,688 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 337 transitions. [2022-11-19 07:58:06,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.52) internal successors, (88), 16 states have internal predecessors, (88), 13 states have call successors, (19), 12 states have call predecessors, (19), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:58:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 337 transitions. [2022-11-19 07:58:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-19 07:58:06,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:06,690 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:06,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:06,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:06,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:06,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1602263745, now seen corresponding path program 2 times [2022-11-19 07:58:06,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18451581] [2022-11-19 07:58:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:06,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:06,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2022-11-19 07:58:07,025 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18451581] [2022-11-19 07:58:07,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18451581] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:07,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881736668] [2022-11-19 07:58:07,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:07,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:07,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:07,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:58:07,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 07:58:07,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:07,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:58:07,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 71 proven. 17 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2022-11-19 07:58:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 71 proven. 18 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-11-19 07:58:07,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881736668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:07,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949520624] [2022-11-19 07:58:07,430 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:07,430 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:07,431 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 07:58:07,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:07,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 13 [2022-11-19 07:58:07,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120950871] [2022-11-19 07:58:07,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:07,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:58:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:07,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:58:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:58:07,433 INFO L87 Difference]: Start difference. First operand 272 states and 337 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 07:58:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:07,641 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2022-11-19 07:58:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:58:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) Word has length 84 [2022-11-19 07:58:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:07,644 INFO L225 Difference]: With dead ends: 456 [2022-11-19 07:58:07,644 INFO L226 Difference]: Without dead ends: 198 [2022-11-19 07:58:07,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 160 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:58:07,647 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:07,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 35 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-19 07:58:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2022-11-19 07:58:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 142 states have (on average 1.147887323943662) internal successors, (163), 143 states have internal predecessors, (163), 23 states have call successors, (23), 13 states have call predecessors, (23), 13 states have return successors, (25), 23 states have call predecessors, (25), 22 states have call successors, (25) [2022-11-19 07:58:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 211 transitions. [2022-11-19 07:58:07,665 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 211 transitions. Word has length 84 [2022-11-19 07:58:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:07,666 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 211 transitions. [2022-11-19 07:58:07,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 07:58:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 211 transitions. [2022-11-19 07:58:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-19 07:58:07,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:07,668 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 9, 9, 9, 9, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:58:07,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:07,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:07,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:07,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:07,875 INFO L85 PathProgramCache]: Analyzing trace with hash -716066766, now seen corresponding path program 3 times [2022-11-19 07:58:07,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:07,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385265621] [2022-11-19 07:58:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:07,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-19 07:58:08,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:08,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385265621] [2022-11-19 07:58:08,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385265621] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:08,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052068713] [2022-11-19 07:58:08,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:58:08,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:08,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:08,047 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:08,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:58:08,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:58:08,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:08,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:58:08,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-11-19 07:58:08,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:08,428 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-11-19 07:58:08,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052068713] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:08,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [263010863] [2022-11-19 07:58:08,434 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:08,434 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:08,434 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 07:58:08,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:08,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2022-11-19 07:58:08,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916258324] [2022-11-19 07:58:08,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:08,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:58:08,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:58:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:58:08,439 INFO L87 Difference]: Start difference. First operand 180 states and 211 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:58:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:08,585 INFO L93 Difference]: Finished difference Result 204 states and 242 transitions. [2022-11-19 07:58:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:58:08,585 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 85 [2022-11-19 07:58:08,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:08,587 INFO L225 Difference]: With dead ends: 204 [2022-11-19 07:58:08,587 INFO L226 Difference]: Without dead ends: 202 [2022-11-19 07:58:08,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 161 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:58:08,588 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:08,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-19 07:58:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-11-19 07:58:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 156 states have internal predecessors, (173), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-19 07:58:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 231 transitions. [2022-11-19 07:58:08,606 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 231 transitions. Word has length 85 [2022-11-19 07:58:08,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:08,607 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 231 transitions. [2022-11-19 07:58:08,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 16 states have internal predecessors, (40), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2022-11-19 07:58:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 231 transitions. [2022-11-19 07:58:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-19 07:58:08,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:08,609 INFO L195 NwaCegarLoop]: trace histogram [15, 13, 10, 10, 10, 10, 8, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2022-11-19 07:58:08,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:08,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:08,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:08,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1927833066, now seen corresponding path program 1 times [2022-11-19 07:58:08,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000346433] [2022-11-19 07:58:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-19 07:58:09,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000346433] [2022-11-19 07:58:09,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000346433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:09,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806577493] [2022-11-19 07:58:09,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:09,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:09,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:09,217 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:09,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:58:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:09,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:58:09,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 30 proven. 44 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-11-19 07:58:09,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 45 proven. 45 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2022-11-19 07:58:10,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806577493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:10,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626972247] [2022-11-19 07:58:10,067 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:10,067 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:10,068 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 07:58:10,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:10,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 13] total 25 [2022-11-19 07:58:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301132460] [2022-11-19 07:58:10,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:10,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:58:10,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:10,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:58:10,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-11-19 07:58:10,073 INFO L87 Difference]: Start difference. First operand 197 states and 231 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:58:10,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:10,267 INFO L93 Difference]: Finished difference Result 201 states and 236 transitions. [2022-11-19 07:58:10,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 07:58:10,267 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) Word has length 119 [2022-11-19 07:58:10,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:10,270 INFO L225 Difference]: With dead ends: 201 [2022-11-19 07:58:10,270 INFO L226 Difference]: Without dead ends: 199 [2022-11-19 07:58:10,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 224 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:58:10,271 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 33 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:10,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 133 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:10,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-19 07:58:10,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2022-11-19 07:58:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (33), 27 states have call predecessors, (33), 24 states have call successors, (33) [2022-11-19 07:58:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 221 transitions. [2022-11-19 07:58:10,291 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 221 transitions. Word has length 119 [2022-11-19 07:58:10,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:10,292 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 221 transitions. [2022-11-19 07:58:10,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 9 states have return successors, (15), 14 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 07:58:10,293 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 221 transitions. [2022-11-19 07:58:10,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-11-19 07:58:10,296 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:10,296 INFO L195 NwaCegarLoop]: trace histogram [20, 16, 14, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 6, 4, 4, 1, 1, 1] [2022-11-19 07:58:10,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:58:10,502 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:10,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:10,502 INFO L85 PathProgramCache]: Analyzing trace with hash 597118280, now seen corresponding path program 4 times [2022-11-19 07:58:10,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:10,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141125357] [2022-11-19 07:58:10,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:10,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 72 proven. 598 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-19 07:58:10,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141125357] [2022-11-19 07:58:10,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141125357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:10,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717529567] [2022-11-19 07:58:10,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:58:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:10,972 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:10,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:58:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:11,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:58:11,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 472 proven. 377 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-11-19 07:58:11,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 72 proven. 605 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2022-11-19 07:58:11,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717529567] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [72027947] [2022-11-19 07:58:11,861 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:11,861 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:11,862 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 07:58:11,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:11,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 21] total 22 [2022-11-19 07:58:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398940928] [2022-11-19 07:58:11,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:58:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:58:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:58:11,865 INFO L87 Difference]: Start difference. First operand 195 states and 221 transitions. Second operand has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 16 states have internal predecessors, (96), 13 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:58:12,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:12,323 INFO L93 Difference]: Finished difference Result 375 states and 430 transitions. [2022-11-19 07:58:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-19 07:58:12,326 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 16 states have internal predecessors, (96), 13 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) Word has length 170 [2022-11-19 07:58:12,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:12,327 INFO L225 Difference]: With dead ends: 375 [2022-11-19 07:58:12,327 INFO L226 Difference]: Without dead ends: 178 [2022-11-19 07:58:12,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 329 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2022-11-19 07:58:12,329 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 261 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:12,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 300 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:58:12,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-19 07:58:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2022-11-19 07:58:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 136 states have internal predecessors, (143), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-19 07:58:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 190 transitions. [2022-11-19 07:58:12,344 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 190 transitions. Word has length 170 [2022-11-19 07:58:12,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:12,345 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 190 transitions. [2022-11-19 07:58:12,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.571428571428571) internal successors, (96), 16 states have internal predecessors, (96), 13 states have call successors, (18), 8 states have call predecessors, (18), 5 states have return successors, (13), 6 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 07:58:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 190 transitions. [2022-11-19 07:58:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-11-19 07:58:12,347 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:12,347 INFO L195 NwaCegarLoop]: trace histogram [20, 17, 14, 12, 12, 12, 12, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 3, 1, 1, 1] [2022-11-19 07:58:12,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:12,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:58:12,562 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:12,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -869639833, now seen corresponding path program 5 times [2022-11-19 07:58:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:12,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282576100] [2022-11-19 07:58:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 78 proven. 183 refuted. 0 times theorem prover too weak. 776 trivial. 0 not checked. [2022-11-19 07:58:13,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:13,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282576100] [2022-11-19 07:58:13,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282576100] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:13,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286977045] [2022-11-19 07:58:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:58:13,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:13,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:13,327 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:13,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:58:13,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-19 07:58:13,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-19 07:58:13,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 78 proven. 129 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2022-11-19 07:58:13,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:15,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 144 proven. 122 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2022-11-19 07:58:15,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286977045] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:15,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1761860460] [2022-11-19 07:58:15,195 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:15,195 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:15,196 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 07:58:15,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:15,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2022-11-19 07:58:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080821458] [2022-11-19 07:58:15,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:15,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 07:58:15,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:15,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 07:58:15,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-11-19 07:58:15,200 INFO L87 Difference]: Start difference. First operand 171 states and 190 transitions. Second operand has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-19 07:58:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:15,367 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2022-11-19 07:58:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:58:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 171 [2022-11-19 07:58:15,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:15,371 INFO L225 Difference]: With dead ends: 172 [2022-11-19 07:58:15,371 INFO L226 Difference]: Without dead ends: 171 [2022-11-19 07:58:15,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 326 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 07:58:15,373 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:15,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 147 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:58:15,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-19 07:58:15,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-19 07:58:15,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.037037037037037) internal successors, (140), 136 states have internal predecessors, (140), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-19 07:58:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2022-11-19 07:58:15,387 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 171 [2022-11-19 07:58:15,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:15,388 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2022-11-19 07:58:15,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 32 states have internal predecessors, (80), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-19 07:58:15,388 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2022-11-19 07:58:15,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-11-19 07:58:15,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:15,398 INFO L195 NwaCegarLoop]: trace histogram [44, 40, 36, 23, 23, 23, 23, 20, 20, 20, 20, 20, 20, 20, 19, 19, 13, 8, 1, 1, 1] [2022-11-19 07:58:15,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:15,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:15,605 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash 2145370751, now seen corresponding path program 6 times [2022-11-19 07:58:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:15,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458155192] [2022-11-19 07:58:15,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:15,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:19,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6152 backedges. 830 proven. 1451 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2022-11-19 07:58:19,400 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458155192] [2022-11-19 07:58:19,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458155192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:19,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103146571] [2022-11-19 07:58:19,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:58:19,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:19,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:19,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:58:19,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:58:19,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:58:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-19 07:58:19,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6152 backedges. 820 proven. 1093 refuted. 0 times theorem prover too weak. 4239 trivial. 0 not checked. [2022-11-19 07:58:20,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:58:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6152 backedges. 1149 proven. 996 refuted. 0 times theorem prover too weak. 4007 trivial. 0 not checked. [2022-11-19 07:58:28,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103146571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:58:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1970600858] [2022-11-19 07:58:28,766 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:58:28,766 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:58:28,767 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 07:58:28,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:58:28,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2022-11-19 07:58:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773622460] [2022-11-19 07:58:28,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:58:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-19 07:58:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:58:28,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-19 07:58:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 07:58:28,771 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2022-11-19 07:58:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:58:28,978 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2022-11-19 07:58:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 07:58:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) Word has length 414 [2022-11-19 07:58:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:58:28,981 INFO L225 Difference]: With dead ends: 172 [2022-11-19 07:58:28,981 INFO L226 Difference]: Without dead ends: 171 [2022-11-19 07:58:28,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 812 SyntacticMatches, 51 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2407 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=510, Invalid=1746, Unknown=0, NotChecked=0, Total=2256 [2022-11-19 07:58:28,983 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:58:28,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 234 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:58:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-11-19 07:58:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-11-19 07:58:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 136 states have internal predecessors, (137), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-11-19 07:58:28,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 184 transitions. [2022-11-19 07:58:28,993 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 184 transitions. Word has length 414 [2022-11-19 07:58:28,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:58:28,996 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 184 transitions. [2022-11-19 07:58:28,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.533333333333333) internal successors, (114), 46 states have internal predecessors, (114), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2022-11-19 07:58:28,996 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 184 transitions. [2022-11-19 07:58:29,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1070 [2022-11-19 07:58:29,035 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:58:29,035 INFO L195 NwaCegarLoop]: trace histogram [110, 108, 89, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 53, 53, 34, 21, 1, 1, 1] [2022-11-19 07:58:29,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:58:29,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:58:29,241 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-19 07:58:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:58:29,242 INFO L85 PathProgramCache]: Analyzing trace with hash -939220818, now seen corresponding path program 7 times [2022-11-19 07:58:29,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:58:29,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610265205] [2022-11-19 07:58:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:58:29,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:58:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41881 backedges. 6794 proven. 10214 refuted. 0 times theorem prover too weak. 24873 trivial. 0 not checked. [2022-11-19 07:58:51,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:58:51,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610265205] [2022-11-19 07:58:51,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610265205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:58:51,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768669036] [2022-11-19 07:58:51,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:58:51,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:58:51,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:58:51,069 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:58:51,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:58:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:58:51,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 2001 conjuncts, 217 conjunts are in the unsatisfiable core [2022-11-19 07:58:51,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:58:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41881 backedges. 6686 proven. 7802 refuted. 0 times theorem prover too weak. 27393 trivial. 0 not checked. [2022-11-19 07:58:53,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:59:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 41881 backedges. 7863 proven. 7339 refuted. 0 times theorem prover too weak. 26679 trivial. 0 not checked. [2022-11-19 07:59:37,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768669036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:59:37,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258748923] [2022-11-19 07:59:37,400 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 07:59:37,400 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:59:37,401 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 07:59:37,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:59:37,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 41] total 59 [2022-11-19 07:59:37,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488291868] [2022-11-19 07:59:37,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:59:37,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-19 07:59:37,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:59:37,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-19 07:59:37,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=2770, Unknown=0, NotChecked=0, Total=3540 [2022-11-19 07:59:37,407 INFO L87 Difference]: Start difference. First operand 171 states and 184 transitions. Second operand has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-19 07:59:37,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:59:37,620 INFO L93 Difference]: Finished difference Result 171 states and 184 transitions. [2022-11-19 07:59:37,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 07:59:37,621 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) Word has length 1069 [2022-11-19 07:59:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:59:37,625 INFO L225 Difference]: With dead ends: 171 [2022-11-19 07:59:37,625 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 07:59:37,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2355 GetRequests, 2135 SyntacticMatches, 160 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7550 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=831, Invalid=2951, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 07:59:37,629 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:59:37,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 216 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:59:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 07:59:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 07:59:37,631 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 07:59:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 07:59:37,631 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1069 [2022-11-19 07:59:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:59:37,632 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 07:59:37,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.5084745762711864) internal successors, (148), 60 states have internal predecessors, (148), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2022-11-19 07:59:37,632 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 07:59:37,632 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 07:59:37,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2022-11-19 07:59:37,635 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2022-11-19 07:59:37,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2022-11-19 07:59:37,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2022-11-19 07:59:37,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2022-11-19 07:59:37,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2022-11-19 07:59:37,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-19 07:59:37,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:59:37,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 07:59:38,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 07:59:38,733 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 07:59:38,733 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= |ULTIMATE.start_main_~x~0#1| 10) (<= 10 |ULTIMATE.start_main_~x~0#1|)) [2022-11-19 07:59:38,733 INFO L895 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 10) [2022-11-19 07:59:38,733 INFO L899 garLoopResultBuilder]: For program point fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,733 INFO L899 garLoopResultBuilder]: For program point fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 10)) (and (<= |fibo_#in~n| fibo_~n) (<= fibo_~n 10))) (or (< 1 fibo_~n) (not (<= |fibo_#in~n| 2))) (or (<= fibo_~n |fibo_#in~n|) (not (<= |fibo_#in~n| 9)))) [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,734 INFO L899 garLoopResultBuilder]: For program point L13-5(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,735 INFO L895 garLoopResultBuilder]: At program point L13-6(line 13) the Hoare annotation is: (let ((.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse0 (<= |fibo_#in~n| fibo_~n)) (.cse1 (<= 2 |fibo_#t~ret4|))) (and (or (not (<= |fibo_#in~n| 10)) (not (<= 10 |fibo_#in~n|)) (and .cse0 (<= fibo_~n 10) .cse1 (< |fibo_#t~ret4| 2147483615))) (or (not (<= |fibo_#in~n| 5)) (not (<= 5 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#t~ret4| 3) (<= fibo_~n 5))) (or (not (<= 7 |fibo_#in~n|)) (not (<= |fibo_#in~n| 7)) (and (<= |fibo_#t~ret4| 8) .cse0 (<= fibo_~n 7) .cse1)) (or (and .cse0 (= |fibo_#t~ret4| 1) (<= fibo_~n 3)) (not (<= |fibo_#in~n| 3))) (or (and (<= |fibo_#t~ret4| 13) .cse2 .cse0 .cse1) (not (<= |fibo_#in~n| 8)) (not (<= 8 |fibo_#in~n|))) (or (and .cse2 (< 1 fibo_~n)) (not (<= |fibo_#in~n| 2))) (or (and .cse0 (<= |fibo_#t~ret4| 2) (<= fibo_~n 4) .cse1) (not (<= |fibo_#in~n| 4)) (not (< 3 |fibo_#in~n|))) (or (not (<= 6 |fibo_#in~n|)) (not (<= |fibo_#in~n| 6)) (and (<= |fibo_#t~ret4| 5) .cse0 (<= fibo_~n 6) .cse1)) (or (not (<= 9 |fibo_#in~n|)) (and .cse2 .cse0 .cse1 (<= |fibo_#t~ret4| 21)) (not (<= |fibo_#in~n| 9))))) [2022-11-19 07:59:38,735 INFO L899 garLoopResultBuilder]: For program point L13-7(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point L13-8(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point L13-9(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,736 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2022-11-19 07:59:38,737 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2022-11-19 07:59:38,737 INFO L899 garLoopResultBuilder]: For program point fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-19 07:59:38,737 INFO L902 garLoopResultBuilder]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2022-11-19 07:59:38,740 INFO L444 BasicCegarLoop]: Path program histogram: [7, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 07:59:38,742 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:59:38,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:59:38 BoogieIcfgContainer [2022-11-19 07:59:38,753 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:59:38,753 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:59:38,753 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:59:38,753 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:59:38,754 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:57:58" (3/4) ... [2022-11-19 07:59:38,756 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 07:59:38,760 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2022-11-19 07:59:38,770 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-19 07:59:38,770 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-19 07:59:38,770 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 07:59:38,770 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 07:59:38,805 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:59:38,806 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:59:38,806 INFO L158 Benchmark]: Toolchain (without parser) took 100955.43ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 91.5MB in the beginning and 539.9MB in the end (delta: -448.3MB). Peak memory consumption was 642.4MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,807 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 54.1MB in the beginning and 54.0MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:59:38,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.00ms. Allocated memory is still 125.8MB. Free memory was 91.3MB in the beginning and 102.9MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,808 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.00ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 101.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,809 INFO L158 Benchmark]: Boogie Preprocessor took 28.26ms. Allocated memory is still 125.8MB. Free memory was 101.2MB in the beginning and 100.2MB in the end (delta: 961.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:59:38,809 INFO L158 Benchmark]: RCFGBuilder took 400.11ms. Allocated memory is still 125.8MB. Free memory was 100.2MB in the beginning and 89.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,810 INFO L158 Benchmark]: TraceAbstraction took 100180.35ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 88.6MB in the beginning and 542.0MB in the end (delta: -453.4MB). Peak memory consumption was 639.1MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,811 INFO L158 Benchmark]: Witness Printer took 52.54ms. Allocated memory is still 1.2GB. Free memory was 542.0MB in the beginning and 539.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:59:38,815 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 83.9MB. Free memory was 54.1MB in the beginning and 54.0MB in the end (delta: 24.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.00ms. Allocated memory is still 125.8MB. Free memory was 91.3MB in the beginning and 102.9MB in the end (delta: -11.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.00ms. Allocated memory is still 125.8MB. Free memory was 102.9MB in the beginning and 101.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.26ms. Allocated memory is still 125.8MB. Free memory was 101.2MB in the beginning and 100.2MB in the end (delta: 961.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 400.11ms. Allocated memory is still 125.8MB. Free memory was 100.2MB in the beginning and 89.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 100180.35ms. Allocated memory was 125.8MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 88.6MB in the beginning and 542.0MB in the end (delta: -453.4MB). Peak memory consumption was 639.1MB. Max. memory is 16.1GB. * Witness Printer took 52.54ms. Allocated memory is still 1.2GB. Free memory was 542.0MB in the beginning and 539.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 100.1s, OverallIterations: 15, TraceHistogramMax: 110, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1569 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1519 mSDsluCounter, 2320 SdHoareTripleChecker+Invalid, 2.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1927 mSDsCounter, 591 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3855 IncrementalHoareTripleChecker+Invalid, 4446 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 591 mSolverCounterUnsat, 393 mSDtfsCounter, 3855 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5113 GetRequests, 4488 SyntacticMatches, 274 SemanticMatches, 351 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12246 ImplicationChecksByTransitivity, 6.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=301occurred in iteration=7, InterpolantAutomatonStates: 216, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 136 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 389 PreInvPairs, 415 NumberOfFragments, 222 HoareAnnotationTreeSize, 389 FomulaSimplifications, 988 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 1364 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 88.9s InterpolantComputationTime, 4779 NumberOfCodeBlocks, 4677 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 7032 ConstructedInterpolants, 0 QuantifiedInterpolants, 16455 SizeOfPredicates, 31 NumberOfNonLiveVariables, 4382 ConjunctsInSsa, 426 ConjunctsInUnsatCore, 36 InterpolantComputations, 5 PerfectInterpolantSequences, 124408/155897 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: x <= 10 RESULT: Ultimate proved your program to be correct! [2022-11-19 07:59:38,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03db505f-00ad-4fc2-b2ce-c1eac2db1f8f/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