./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-26 00:55:55,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:55:55,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:55:55,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:55:55,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:55:55,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:55:55,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:55:55,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:55:55,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:55:55,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:55:55,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:55:55,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:55:55,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:55:55,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:55:55,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:55:55,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:55:55,942 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:55:55,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:55:55,944 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:55:55,953 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:55:55,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:55:55,961 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:55:55,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:55:55,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:55:55,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:55:55,975 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:55:55,975 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:55:55,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:55:55,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:55:55,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:55:55,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:55:55,980 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:55:55,982 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:55:55,983 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:55:55,984 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:55:55,984 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:55:55,985 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:55:55,985 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:55:55,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:55:55,986 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:55:55,987 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:55:55,988 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-26 00:55:56,026 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:55:56,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:55:56,027 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:55:56,027 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:55:56,028 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:55:56,029 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:55:56,029 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:55:56,029 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:55:56,029 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:55:56,030 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:55:56,031 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:55:56,031 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:55:56,031 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:55:56,031 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:55:56,032 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:55:56,032 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:55:56,032 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:55:56,032 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:55:56,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:55:56,033 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:55:56,033 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:55:56,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:55:56,034 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:55:56,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:55:56,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:55:56,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:55:56,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:55:56,035 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:55:56,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:55:56,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:55:56,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:55:56,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:55:56,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:55:56,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:55:56,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:55:56,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:55:56,039 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:55:56,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:55:56,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:55:56,039 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:55:56,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:55:56,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:55:56,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:55:56,040 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_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40add90db9f8d501baba3978de407d6383e788a1a5fafc7225d7676b58d18c84 [2022-11-26 00:55:56,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:55:56,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:55:56,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:55:56,430 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:55:56,430 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:55:56,431 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2022-11-26 00:55:59,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:55:59,883 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:55:59,884 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2022-11-26 00:55:59,891 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/data/56ef628ac/05ce3e787edf41d59300ac6cc30b7196/FLAGd27aca415 [2022-11-26 00:55:59,916 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/data/56ef628ac/05ce3e787edf41d59300ac6cc30b7196 [2022-11-26 00:55:59,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:55:59,922 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:55:59,924 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:55:59,924 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:55:59,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:55:59,929 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:55:59" (1/1) ... [2022-11-26 00:55:59,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@118dcbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:55:59, skipping insertion in model container [2022-11-26 00:55:59,931 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:55:59" (1/1) ... [2022-11-26 00:55:59,939 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:55:59,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:56:00,162 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2022-11-26 00:56:00,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:56:00,178 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:56:00,194 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/sv-benchmarks/c/recursive-simple/fibo_7-2.c[741,754] [2022-11-26 00:56:00,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:56:00,213 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:56:00,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00 WrapperNode [2022-11-26 00:56:00,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:56:00,215 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:56:00,215 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:56:00,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:56:00,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,246 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-26 00:56:00,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:56:00,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:56:00,247 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:56:00,247 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:56:00,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,259 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:56:00,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:56:00,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:56:00,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:56:00,282 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (1/1) ... [2022-11-26 00:56:00,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:56:00,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:00,316 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:56:00,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:56:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:56:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:56:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:56:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:56:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-11-26 00:56:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-11-26 00:56:00,444 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:56:00,447 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:56:00,568 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:56:00,591 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:56:00,591 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:56:00,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:00 BoogieIcfgContainer [2022-11-26 00:56:00,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:56:00,597 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:56:00,597 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:56:00,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:56:00,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:55:59" (1/3) ... [2022-11-26 00:56:00,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2409c777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:56:00, skipping insertion in model container [2022-11-26 00:56:00,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:56:00" (2/3) ... [2022-11-26 00:56:00,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2409c777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:56:00, skipping insertion in model container [2022-11-26 00:56:00,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:00" (3/3) ... [2022-11-26 00:56:00,602 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_7-2.c [2022-11-26 00:56:00,630 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:56:00,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-26 00:56:00,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:56:00,706 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;@185f518c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:56:00,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-26 00:56:00,711 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) [2022-11-26 00:56:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:56:00,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:00,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:56:00,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1907138082, now seen corresponding path program 1 times [2022-11-26 00:56:00,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789551875] [2022-11-26 00:56:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:00,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:00,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:00,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:00,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789551875] [2022-11-26 00:56:00,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789551875] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:00,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:00,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:56:00,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014430835] [2022-11-26 00:56:00,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:56:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:56:01,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:56:01,009 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:01,105 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-26 00:56:01,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:56:01,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-26 00:56:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:01,117 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:56:01,118 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:56:01,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:56:01,124 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:01,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:56:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-26 00:56:01,165 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) [2022-11-26 00:56:01,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-26 00:56:01,168 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-11-26 00:56:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:01,169 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-26 00:56:01,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-26 00:56:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:56:01,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:01,171 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:56:01,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1008261661, now seen corresponding path program 1 times [2022-11-26 00:56:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:01,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091343093] [2022-11-26 00:56:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:01,245 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:01,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091343093] [2022-11-26 00:56:01,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091343093] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:01,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:01,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:56:01,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126648756] [2022-11-26 00:56:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:01,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:56:01,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:01,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:56:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:56:01,249 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:01,332 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-26 00:56:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:56:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-26 00:56:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:01,334 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:56:01,334 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 00:56:01,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:56:01,336 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:01,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:01,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 00:56:01,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-26 00:56:01,345 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) [2022-11-26 00:56:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-26 00:56:01,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-11-26 00:56:01,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:01,350 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-26 00:56:01,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:01,350 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-26 00:56:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:56:01,351 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:01,352 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:01,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:56:01,352 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1283862660, now seen corresponding path program 1 times [2022-11-26 00:56:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:01,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190988660] [2022-11-26 00:56:01,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:01,634 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:56:01,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:01,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190988660] [2022-11-26 00:56:01,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190988660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:01,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:01,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:56:01,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474918584] [2022-11-26 00:56:01,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:01,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:56:01,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:01,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:56:01,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:56:01,638 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) [2022-11-26 00:56:01,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:01,687 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-26 00:56:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:56:01,687 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 [2022-11-26 00:56:01,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:01,689 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:56:01,689 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:56:01,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:56:01,691 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:01,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 45 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:56:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:56:01,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-26 00:56:01,698 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) [2022-11-26 00:56:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-26 00:56:01,700 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2022-11-26 00:56:01,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:01,701 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-26 00:56:01,701 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) [2022-11-26 00:56:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-26 00:56:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:56:01,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:01,703 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:01,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:56:01,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1156874401, now seen corresponding path program 1 times [2022-11-26 00:56:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:01,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016876717] [2022-11-26 00:56:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:01,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:56:01,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:01,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016876717] [2022-11-26 00:56:01,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016876717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:01,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19195357] [2022-11-26 00:56:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:01,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:01,889 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:01,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:56:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:01,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:56:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:02,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:02,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:02,401 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:02,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19195357] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:02,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [618204060] [2022-11-26 00:56:02,422 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:56:02,422 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:02,427 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:02,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:02,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-26 00:56:02,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289013243] [2022-11-26 00:56:02,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:02,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:56:02,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:02,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:56:02,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:56:02,432 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) [2022-11-26 00:56:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:03,035 INFO L93 Difference]: Finished difference Result 177 states and 247 transitions. [2022-11-26 00:56:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:56:03,036 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 [2022-11-26 00:56:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:03,038 INFO L225 Difference]: With dead ends: 177 [2022-11-26 00:56:03,038 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:56:03,040 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 [2022-11-26 00:56:03,041 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:03,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 233 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:56:03,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:56:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2022-11-26 00:56:03,067 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) [2022-11-26 00:56:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2022-11-26 00:56:03,072 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 29 [2022-11-26 00:56:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:03,072 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2022-11-26 00:56:03,073 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) [2022-11-26 00:56:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2022-11-26 00:56:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:56:03,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:03,075 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:03,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:03,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:03,284 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:03,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash -969835265, now seen corresponding path program 2 times [2022-11-26 00:56:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653471436] [2022-11-26 00:56:03,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:56:03,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653471436] [2022-11-26 00:56:03,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653471436] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:03,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147262052] [2022-11-26 00:56:03,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:03,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:03,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:03,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:56:03,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:56:03,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:03,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:56:03,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:56:03,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:56:03,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147262052] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:03,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:56:03,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-26 00:56:03,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698427414] [2022-11-26 00:56:03,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:03,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:56:03,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:03,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:56:03,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:56:03,581 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) [2022-11-26 00:56:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:03,635 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2022-11-26 00:56:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:56:03,636 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 [2022-11-26 00:56:03,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:03,639 INFO L225 Difference]: With dead ends: 152 [2022-11-26 00:56:03,639 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:56:03,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:56:03,641 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:03,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 51 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:56:03,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:56:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2022-11-26 00:56:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 106 states have (on average 1.1037735849056605) internal successors, (117), 106 states have internal predecessors, (117), 17 states have call successors, (17), 5 states have call predecessors, (17), 11 states have return successors, (55), 24 states have call predecessors, (55), 16 states have call successors, (55) [2022-11-26 00:56:03,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2022-11-26 00:56:03,692 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 41 [2022-11-26 00:56:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:03,694 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2022-11-26 00:56:03,694 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) [2022-11-26 00:56:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2022-11-26 00:56:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:56:03,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:03,698 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] [2022-11-26 00:56:03,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:03,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:03,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:03,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -122072, now seen corresponding path program 1 times [2022-11-26 00:56:03,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:03,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98905183] [2022-11-26 00:56:03,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:03,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:56:04,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98905183] [2022-11-26 00:56:04,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98905183] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:04,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528632839] [2022-11-26 00:56:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:04,078 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:04,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:56:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:04,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:56:04,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:56:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-26 00:56:04,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528632839] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:04,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1849817036] [2022-11-26 00:56:04,664 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:04,664 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:04,664 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:04,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:04,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 21 [2022-11-26 00:56:04,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676028037] [2022-11-26 00:56:04,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:04,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:56:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:56:04,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:56:04,672 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:56:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:05,657 INFO L93 Difference]: Finished difference Result 402 states and 604 transitions. [2022-11-26 00:56:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:56:05,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-11-26 00:56:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:05,661 INFO L225 Difference]: With dead ends: 402 [2022-11-26 00:56:05,661 INFO L226 Difference]: Without dead ends: 280 [2022-11-26 00:56:05,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2022-11-26 00:56:05,666 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 160 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:05,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 360 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:56:05,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-26 00:56:05,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 231. [2022-11-26 00:56:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 182 states have (on average 1.0934065934065933) internal successors, (199), 180 states have internal predecessors, (199), 29 states have call successors, (29), 8 states have call predecessors, (29), 18 states have return successors, (111), 42 states have call predecessors, (111), 28 states have call successors, (111) [2022-11-26 00:56:05,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-11-26 00:56:05,728 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 42 [2022-11-26 00:56:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:05,729 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-11-26 00:56:05,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.210526315789474) internal successors, (61), 16 states have internal predecessors, (61), 10 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-26 00:56:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-11-26 00:56:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:56:05,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:05,731 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:05,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-26 00:56:05,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:05,937 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:05,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1315751957, now seen corresponding path program 1 times [2022-11-26 00:56:05,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:05,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219304272] [2022-11-26 00:56:05,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:05,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-26 00:56:06,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:06,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219304272] [2022-11-26 00:56:06,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219304272] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:56:06,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:56:06,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:56:06,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797617543] [2022-11-26 00:56:06,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:56:06,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:56:06,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:56:06,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:56:06,029 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:56:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:06,088 INFO L93 Difference]: Finished difference Result 247 states and 361 transitions. [2022-11-26 00:56:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:56:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-11-26 00:56:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:06,097 INFO L225 Difference]: With dead ends: 247 [2022-11-26 00:56:06,098 INFO L226 Difference]: Without dead ends: 246 [2022-11-26 00:56:06,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:56:06,101 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:06,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 91 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:56:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-26 00:56:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2022-11-26 00:56:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 185 states have internal predecessors, (205), 30 states have call successors, (30), 8 states have call predecessors, (30), 18 states have return successors, (117), 44 states have call predecessors, (117), 29 states have call successors, (117) [2022-11-26 00:56:06,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 352 transitions. [2022-11-26 00:56:06,164 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 352 transitions. Word has length 55 [2022-11-26 00:56:06,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:06,165 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 352 transitions. [2022-11-26 00:56:06,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-26 00:56:06,165 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 352 transitions. [2022-11-26 00:56:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:56:06,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:06,168 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 8, 8, 8, 8, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-26 00:56:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:56:06,168 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:06,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1226607356, now seen corresponding path program 1 times [2022-11-26 00:56:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:06,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520976575] [2022-11-26 00:56:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:06,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-11-26 00:56:06,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520976575] [2022-11-26 00:56:06,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520976575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:06,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41765704] [2022-11-26 00:56:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:06,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:06,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:06,315 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:06,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:56:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:06,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:56:06,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 106 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:56:06,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:07,076 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 135 proven. 106 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-26 00:56:07,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41765704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:07,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189815434] [2022-11-26 00:56:07,081 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:07,081 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:07,081 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:07,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:07,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 19, 19] total 26 [2022-11-26 00:56:07,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776373119] [2022-11-26 00:56:07,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:07,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:56:07,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:07,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:56:07,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:56:07,089 INFO L87 Difference]: Start difference. First operand 238 states and 352 transitions. Second operand has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 18 states have internal predecessors, (86), 13 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-26 00:56:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:08,030 INFO L93 Difference]: Finished difference Result 461 states and 707 transitions. [2022-11-26 00:56:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:56:08,031 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 18 states have internal predecessors, (86), 13 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 79 [2022-11-26 00:56:08,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:08,033 INFO L225 Difference]: With dead ends: 461 [2022-11-26 00:56:08,034 INFO L226 Difference]: Without dead ends: 233 [2022-11-26 00:56:08,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 128 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=615, Invalid=1547, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:56:08,042 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 363 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:08,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 120 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:56:08,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-26 00:56:08,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2022-11-26 00:56:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 172 states have (on average 1.0872093023255813) internal successors, (187), 171 states have internal predecessors, (187), 27 states have call successors, (27), 9 states have call predecessors, (27), 17 states have return successors, (52), 37 states have call predecessors, (52), 26 states have call successors, (52) [2022-11-26 00:56:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 266 transitions. [2022-11-26 00:56:08,070 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 266 transitions. Word has length 79 [2022-11-26 00:56:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:08,070 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 266 transitions. [2022-11-26 00:56:08,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 18 states have internal predecessors, (86), 13 states have call successors, (19), 9 states have call predecessors, (19), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-26 00:56:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 266 transitions. [2022-11-26 00:56:08,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:56:08,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:08,081 INFO L195 NwaCegarLoop]: trace histogram [9, 7, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:56:08,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:08,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:08,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash 124755018, now seen corresponding path program 1 times [2022-11-26 00:56:08,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:08,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179097602] [2022-11-26 00:56:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:08,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:08,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-11-26 00:56:08,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:08,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179097602] [2022-11-26 00:56:08,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179097602] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:08,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303208686] [2022-11-26 00:56:08,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:08,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:08,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:08,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:08,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:56:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:08,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:56:08,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:08,683 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 37 proven. 116 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-26 00:56:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:09,010 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 9 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-26 00:56:09,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303208686] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:09,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1875277290] [2022-11-26 00:56:09,014 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:09,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:09,015 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:09,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:09,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 17] total 20 [2022-11-26 00:56:09,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241269737] [2022-11-26 00:56:09,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:09,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:56:09,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:56:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:56:09,021 INFO L87 Difference]: Start difference. First operand 218 states and 266 transitions. Second operand has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 15 states have internal predecessors, (71), 12 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-26 00:56:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:09,394 INFO L93 Difference]: Finished difference Result 343 states and 425 transitions. [2022-11-26 00:56:09,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:56:09,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 15 states have internal predecessors, (71), 12 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) Word has length 67 [2022-11-26 00:56:09,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:09,400 INFO L225 Difference]: With dead ends: 343 [2022-11-26 00:56:09,400 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:56:09,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2022-11-26 00:56:09,403 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 168 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:09,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 261 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-26 00:56:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:56:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2022-11-26 00:56:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.118811881188119) internal successors, (113), 103 states have internal predecessors, (113), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:56:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2022-11-26 00:56:09,416 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 67 [2022-11-26 00:56:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:09,417 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2022-11-26 00:56:09,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.736842105263158) internal successors, (71), 15 states have internal predecessors, (71), 12 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (8), 2 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-26 00:56:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2022-11-26 00:56:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:56:09,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:09,418 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 6, 6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:56:09,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:09,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:09,624 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:09,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1026369843, now seen corresponding path program 2 times [2022-11-26 00:56:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:09,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388339798] [2022-11-26 00:56:09,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:09,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-11-26 00:56:09,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388339798] [2022-11-26 00:56:09,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388339798] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378891606] [2022-11-26 00:56:09,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:09,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:09,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:09,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:09,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:56:09,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:56:09,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:09,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:56:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2022-11-26 00:56:09,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-11-26 00:56:10,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378891606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:10,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1193200745] [2022-11-26 00:56:10,135 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:10,135 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:10,136 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:10,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:10,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2022-11-26 00:56:10,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611843926] [2022-11-26 00:56:10,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:10,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:56:10,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:10,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:56:10,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:56:10,138 INFO L87 Difference]: Start difference. First operand 129 states and 146 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2022-11-26 00:56:10,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:10,230 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-26 00:56:10,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:56:10,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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 68 [2022-11-26 00:56:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:10,232 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:56:10,232 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:56:10,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:56:10,233 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:10,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 88 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:56:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-11-26 00:56:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 103 states have internal predecessors, (109), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:56:10,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2022-11-26 00:56:10,244 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 68 [2022-11-26 00:56:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:10,246 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2022-11-26 00:56:10,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2022-11-26 00:56:10,247 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2022-11-26 00:56:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:56:10,248 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:10,248 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 8, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1] [2022-11-26 00:56:10,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:10,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:56:10,463 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:10,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1560851675, now seen corresponding path program 2 times [2022-11-26 00:56:10,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:10,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376524450] [2022-11-26 00:56:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-11-26 00:56:10,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376524450] [2022-11-26 00:56:10,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376524450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:10,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294889876] [2022-11-26 00:56:10,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:56:10,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:10,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:10,792 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:10,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:56:10,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:56:10,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:10,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:56:10,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-26 00:56:10,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-11-26 00:56:11,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294889876] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:11,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [421340799] [2022-11-26 00:56:11,147 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:11,148 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:11,148 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:11,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:11,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-11-26 00:56:11,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942023519] [2022-11-26 00:56:11,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:11,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:56:11,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:11,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:56:11,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:56:11,152 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-26 00:56:11,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:11,272 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2022-11-26 00:56:11,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:56:11,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) Word has length 100 [2022-11-26 00:56:11,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:11,274 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:56:11,274 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:56:11,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 195 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-11-26 00:56:11,275 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:11,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 183 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:11,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:56:11,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-26 00:56:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 102 states have internal predecessors, (104), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:56:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-11-26 00:56:11,286 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 100 [2022-11-26 00:56:11,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:11,287 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-11-26 00:56:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 19 states have internal predecessors, (57), 6 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2022-11-26 00:56:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-11-26 00:56:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-26 00:56:11,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:11,289 INFO L195 NwaCegarLoop]: trace histogram [17, 14, 14, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1] [2022-11-26 00:56:11,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:11,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:11,490 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1599005666, now seen corresponding path program 3 times [2022-11-26 00:56:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38323052] [2022-11-26 00:56:11,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:11,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2022-11-26 00:56:12,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38323052] [2022-11-26 00:56:12,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38323052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:12,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215997501] [2022-11-26 00:56:12,213 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:56:12,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:12,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:12,215 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:12,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:56:12,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:56:12,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:56:12,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:56:12,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-11-26 00:56:12,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:13,959 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-11-26 00:56:13,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215997501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:13,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328251185] [2022-11-26 00:56:13,963 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:13,963 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:13,964 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:13,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:13,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2022-11-26 00:56:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996426077] [2022-11-26 00:56:13,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:56:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:13,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:56:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:56:13,969 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 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) [2022-11-26 00:56:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:14,106 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-11-26 00:56:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:56:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 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 154 [2022-11-26 00:56:14,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:14,108 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:56:14,108 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:56:14,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 292 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2022-11-26 00:56:14,110 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:14,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 149 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:56:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-26 00:56:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 101 states have (on average 1.00990099009901) internal successors, (102), 102 states have internal predecessors, (102), 17 states have call successors, (17), 9 states have call predecessors, (17), 9 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-26 00:56:14,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-11-26 00:56:14,121 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 154 [2022-11-26 00:56:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:14,121 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-11-26 00:56:14,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 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) [2022-11-26 00:56:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-11-26 00:56:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-11-26 00:56:14,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:56:14,129 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 33, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1] [2022-11-26 00:56:14,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:56:14,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:56:14,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:56:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:56:14,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1551645558, now seen corresponding path program 4 times [2022-11-26 00:56:14,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:56:14,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205143496] [2022-11-26 00:56:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:56:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:56:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3328 trivial. 0 not checked. [2022-11-26 00:56:17,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:56:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205143496] [2022-11-26 00:56:17,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205143496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:56:17,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710834049] [2022-11-26 00:56:17,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:56:17,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:56:17,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:56:17,911 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:56:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:56:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:56:18,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-26 00:56:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:56:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2022-11-26 00:56:18,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:56:27,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2022-11-26 00:56:27,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710834049] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:56:27,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [636895427] [2022-11-26 00:56:27,019 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:56:27,019 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:56:27,020 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:56:27,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:56:27,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2022-11-26 00:56:27,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357094300] [2022-11-26 00:56:27,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:56:27,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 00:56:27,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:56:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 00:56:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:56:27,027 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 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) [2022-11-26 00:56:27,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:56:27,175 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-11-26 00:56:27,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:56:27,175 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 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 397 [2022-11-26 00:56:27,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:56:27,178 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:56:27,178 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:56:27,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 874 GetRequests, 778 SyntacticMatches, 51 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=493, Invalid=1669, Unknown=0, NotChecked=0, Total=2162 [2022-11-26 00:56:27,180 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-26 00:56:27,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 130 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-26 00:56:27,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:56:27,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:56:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-26 00:56:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:56:27,183 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2022-11-26 00:56:27,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:56:27,184 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:56:27,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 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) [2022-11-26 00:56:27,184 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:56:27,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:56:27,189 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2022-11-26 00:56:27,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2022-11-26 00:56:27,190 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2022-11-26 00:56:27,191 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2022-11-26 00:56:27,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2022-11-26 00:56:27,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2022-11-26 00:56:27,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-26 00:56:27,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:56:27,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:56:27,935 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:56:27,935 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:56:27,936 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 7 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 7)) [2022-11-26 00:56:27,936 INFO L902 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-11-26 00:56:27,936 INFO L899 garLoopResultBuilder]: For program point fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,936 INFO L899 garLoopResultBuilder]: For program point fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,936 INFO L899 garLoopResultBuilder]: For program point fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,936 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2022-11-26 00:56:27,936 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,937 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,937 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= |fibo_#in~n| fibo_~n) (<= fibo_~n 7)) (not (<= |fibo_#in~n| 7))) (or (<= fibo_~n |fibo_#in~n|) (not (<= |fibo_#in~n| 6))) (not (<= |fibo_#in~n| 1))) [2022-11-26 00:56:27,937 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,937 INFO L899 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,937 INFO L899 garLoopResultBuilder]: For program point L13-5(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,938 INFO L895 garLoopResultBuilder]: At program point L13-6(line 13) the Hoare annotation is: (let ((.cse1 (<= 2 |fibo_#t~ret4|)) (.cse2 (<= fibo_~n |fibo_#in~n|)) (.cse0 (<= |fibo_#in~n| fibo_~n))) (and (or (not (<= 7 |fibo_#in~n|)) (not (<= |fibo_#in~n| 7)) (and (<= |fibo_#t~ret4| 8) .cse0 (<= fibo_~n 7) .cse1)) (or (and .cse2 .cse0 .cse1 (<= |fibo_#t~ret4| 3)) (not (<= |fibo_#in~n| 5)) (not (<= 5 |fibo_#in~n|))) (or (not (<= |fibo_#in~n| 4)) (and .cse2 .cse0 (<= |fibo_#t~ret4| 2) .cse1) (not (<= 4 |fibo_#in~n|))) (or (not (<= 6 |fibo_#in~n|)) (not (<= |fibo_#in~n| 6)) (and (<= |fibo_#t~ret4| 5) .cse2 .cse0 .cse1)) (or (and .cse2 .cse0 (= |fibo_#t~ret4| 1)) (not (<= |fibo_#in~n| 3))) (not (<= |fibo_#in~n| 1)))) [2022-11-26 00:56:27,938 INFO L899 garLoopResultBuilder]: For program point L13-7(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,938 INFO L899 garLoopResultBuilder]: For program point L13-8(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,941 INFO L899 garLoopResultBuilder]: For program point L13-9(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,941 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L899 garLoopResultBuilder]: For program point fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L899 garLoopResultBuilder]: For program point fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L899 garLoopResultBuilder]: For program point fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:56:27,942 INFO L902 garLoopResultBuilder]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2022-11-26 00:56:27,946 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:56:27,956 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:56:27,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:56:27 BoogieIcfgContainer [2022-11-26 00:56:27,967 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:56:27,967 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:56:27,967 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:56:27,968 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:56:27,968 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:56:00" (3/4) ... [2022-11-26 00:56:27,972 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:56:27,978 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2022-11-26 00:56:27,985 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-26 00:56:27,986 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-26 00:56:27,986 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:56:27,986 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:56:28,027 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:56:28,027 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:56:28,028 INFO L158 Benchmark]: Toolchain (without parser) took 28106.71ms. Allocated memory was 174.1MB in the beginning and 423.6MB in the end (delta: 249.6MB). Free memory was 128.6MB in the beginning and 231.3MB in the end (delta: -102.7MB). Peak memory consumption was 149.7MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,029 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:56:28,029 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.65ms. Allocated memory is still 174.1MB. Free memory was 128.6MB in the beginning and 118.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,030 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.29ms. Allocated memory is still 174.1MB. Free memory was 118.1MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,031 INFO L158 Benchmark]: Boogie Preprocessor took 32.15ms. Allocated memory is still 174.1MB. Free memory was 116.6MB in the beginning and 116.0MB in the end (delta: 597.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:56:28,031 INFO L158 Benchmark]: RCFGBuilder took 313.90ms. Allocated memory is still 174.1MB. Free memory was 116.0MB in the beginning and 104.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,032 INFO L158 Benchmark]: TraceAbstraction took 27370.09ms. Allocated memory was 174.1MB in the beginning and 423.6MB in the end (delta: 249.6MB). Free memory was 104.0MB in the beginning and 234.4MB in the end (delta: -130.4MB). Peak memory consumption was 122.5MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,032 INFO L158 Benchmark]: Witness Printer took 60.41ms. Allocated memory is still 423.6MB. Free memory was 234.4MB in the beginning and 231.3MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:56:28,035 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 134.2MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 290.65ms. Allocated memory is still 174.1MB. Free memory was 128.6MB in the beginning and 118.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.29ms. Allocated memory is still 174.1MB. Free memory was 118.1MB in the beginning and 116.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.15ms. Allocated memory is still 174.1MB. Free memory was 116.6MB in the beginning and 116.0MB in the end (delta: 597.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 313.90ms. Allocated memory is still 174.1MB. Free memory was 116.0MB in the beginning and 104.6MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 27370.09ms. Allocated memory was 174.1MB in the beginning and 423.6MB in the end (delta: 249.6MB). Free memory was 104.0MB in the beginning and 234.4MB in the end (delta: -130.4MB). Peak memory consumption was 122.5MB. Max. memory is 16.1GB. * Witness Printer took 60.41ms. Allocated memory is still 423.6MB. Free memory was 234.4MB in the beginning and 231.3MB in the end (delta: 3.2MB). 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: 27.3s, OverallIterations: 13, TraceHistogramMax: 41, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 984 SdHoareTripleChecker+Valid, 2.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 959 mSDsluCounter, 1750 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1418 mSDsCounter, 356 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3018 IncrementalHoareTripleChecker+Invalid, 3374 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 356 mSolverCounterUnsat, 332 mSDtfsCounter, 3018 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2161 GetRequests, 1795 SyntacticMatches, 104 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4300 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=238occurred in iteration=7, InterpolantAutomatonStates: 169, 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, 13 MinimizatonAttempts, 118 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 260 PreInvPairs, 285 NumberOfFragments, 142 HoareAnnotationTreeSize, 260 FomulaSimplifications, 465 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 781 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.1s InterpolantComputationTime, 2050 NumberOfCodeBlocks, 1939 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 2956 ConstructedInterpolants, 0 QuantifiedInterpolants, 6831 SizeOfPredicates, 23 NumberOfNonLiveVariables, 1828 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 17754/22532 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: 1 RESULT: Ultimate proved your program to be correct! [2022-11-26 00:56:28,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7e6b1b0-1776-4d71-a706-6d06f832fdd0/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE