./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/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_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/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_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/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 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb --- 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 00:37:56,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:37:56,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:37:56,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:37:56,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:37:56,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:37:56,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:37:56,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:37:56,869 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:37:56,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:37:56,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:37:56,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:37:56,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:37:56,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:37:56,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:37:56,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:37:56,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:37:56,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:37:56,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:37:56,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:37:56,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:37:56,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:37:56,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:37:56,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:37:56,890 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:37:56,891 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:37:56,891 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:37:56,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:37:56,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:37:56,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:37:56,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:37:56,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:37:56,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:37:56,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:37:56,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:37:56,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:37:56,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:37:56,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:37:56,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:37:56,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:37:56,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:37:56,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-26 00:37:56,923 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:37:56,924 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:37:56,924 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:37:56,924 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:37:56,925 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:37:56,925 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:37:56,926 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:37:56,926 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:37:56,926 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:37:56,926 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:37:56,927 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:37:56,927 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:37:56,927 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:37:56,927 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:37:56,927 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:37:56,928 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:37:56,928 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:37:56,928 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:37:56,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:37:56,929 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:37:56,930 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-26 00:37:56,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:37:56,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:37:56,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:37:56,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:37:56,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:37:56,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:37:56,931 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-26 00:37:56,931 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:37:56,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:37:56,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:37:56,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:37:56,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:37:56,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:37:56,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:37:56,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:37:56,933 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:37:56,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:37:56,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:37:56,933 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:37:56,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:37:56,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:37:56,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:37:56,934 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_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 17c70baee0bc6a4a26b6403fb6f46125ad9d7f8a7127109634f2327c61aaf5cb [2022-11-26 00:37:57,280 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:37:57,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:37:57,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:37:57,322 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:37:57,323 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:37:57,324 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2022-11-26 00:38:00,429 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:38:00,681 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:38:00,682 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2022-11-26 00:38:00,688 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/data/be9995661/0c36afe26cf246d1ab6c31c709117221/FLAGac9d7dfaf [2022-11-26 00:38:00,709 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/data/be9995661/0c36afe26cf246d1ab6c31c709117221 [2022-11-26 00:38:00,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:38:00,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:38:00,720 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:00,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:38:00,725 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:38:00,726 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:00" (1/1) ... [2022-11-26 00:38:00,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d34804 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:00, skipping insertion in model container [2022-11-26 00:38:00,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:38:00" (1/1) ... [2022-11-26 00:38:00,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:38:00,752 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:38:00,970 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_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2022-11-26 00:38:00,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:00,982 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:38:00,999 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_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/sv-benchmarks/c/recursive-simple/fibo_7-1.c[741,754] [2022-11-26 00:38:01,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:38:01,012 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:38:01,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01 WrapperNode [2022-11-26 00:38:01,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:38:01,014 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:01,014 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:38:01,015 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:38:01,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,030 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,047 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-26 00:38:01,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:38:01,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:38:01,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:38:01,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:38:01,059 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:38:01,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:38:01,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:38:01,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:38:01,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (1/1) ... [2022-11-26 00:38:01,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:38:01,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:01,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:38:01,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:38:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:38:01,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:38:01,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:38:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:38:01,180 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-11-26 00:38:01,180 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-11-26 00:38:01,256 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:38:01,259 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:38:01,470 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:38:01,511 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:38:01,512 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-26 00:38:01,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:01 BoogieIcfgContainer [2022-11-26 00:38:01,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:38:01,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:38:01,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:38:01,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:38:01,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:38:00" (1/3) ... [2022-11-26 00:38:01,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaa15d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:01, skipping insertion in model container [2022-11-26 00:38:01,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:38:01" (2/3) ... [2022-11-26 00:38:01,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaa15d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:38:01, skipping insertion in model container [2022-11-26 00:38:01,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:01" (3/3) ... [2022-11-26 00:38:01,538 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_7-1.c [2022-11-26 00:38:01,562 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:38:01,563 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-26 00:38:01,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:38:01,651 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;@1e289739, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:38:01,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-26 00:38:01,656 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 00:38:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-26 00:38:01,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:01,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-26 00:38:01,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:01,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1907138082, now seen corresponding path program 1 times [2022-11-26 00:38:01,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210540191] [2022-11-26 00:38:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:01,932 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 00:38:01,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:01,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210540191] [2022-11-26 00:38:01,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210540191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:01,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:01,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-26 00:38:01,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772213483] [2022-11-26 00:38:01,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:01,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:38:01,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:38:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:38:02,019 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 00:38:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:02,124 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-11-26 00:38:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:38:02,127 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 00:38:02,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:02,135 INFO L225 Difference]: With dead ends: 27 [2022-11-26 00:38:02,135 INFO L226 Difference]: Without dead ends: 23 [2022-11-26 00:38:02,138 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 00:38:02,141 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2022-11-26 00:38:02,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-26 00:38:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-26 00:38:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-11-26 00:38:02,173 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 00:38:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-11-26 00:38:02,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-11-26 00:38:02,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:02,176 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-11-26 00:38:02,176 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 00:38:02,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-11-26 00:38:02,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-26 00:38:02,178 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:02,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:38:02,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:38:02,178 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:02,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:02,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1008261661, now seen corresponding path program 1 times [2022-11-26 00:38:02,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:02,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021223549] [2022-11-26 00:38:02,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:02,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:02,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:02,248 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 00:38:02,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:02,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021223549] [2022-11-26 00:38:02,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021223549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:02,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:02,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:38:02,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611611728] [2022-11-26 00:38:02,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:02,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:02,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:02,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:02,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:02,252 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 00:38:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:02,332 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-11-26 00:38:02,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:02,333 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 00:38:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:02,336 INFO L225 Difference]: With dead ends: 21 [2022-11-26 00:38:02,337 INFO L226 Difference]: Without dead ends: 19 [2022-11-26 00:38:02,338 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 00:38:02,339 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 00:38:02,341 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 00:38:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-26 00:38:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-26 00:38:02,349 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 00:38:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-26 00:38:02,352 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-11-26 00:38:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:02,354 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-26 00:38:02,355 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 00:38:02,356 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-26 00:38:02,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-26 00:38:02,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:02,358 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 00:38:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-26 00:38:02,359 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:02,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1283862660, now seen corresponding path program 1 times [2022-11-26 00:38:02,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:02,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717942892] [2022-11-26 00:38:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:02,600 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 00:38:02,601 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:02,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717942892] [2022-11-26 00:38:02,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717942892] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:02,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:02,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:38:02,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022932827] [2022-11-26 00:38:02,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:02,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:02,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:02,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:02,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:02,605 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 00:38:02,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:02,657 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-26 00:38:02,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:02,658 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 00:38:02,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:02,660 INFO L225 Difference]: With dead ends: 35 [2022-11-26 00:38:02,660 INFO L226 Difference]: Without dead ends: 33 [2022-11-26 00:38:02,661 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 00:38:02,663 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 00:38:02,663 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 00:38:02,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-26 00:38:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-11-26 00:38:02,671 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 00:38:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-11-26 00:38:02,673 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2022-11-26 00:38:02,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:02,674 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-11-26 00:38:02,674 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 00:38:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-11-26 00:38:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-26 00:38:02,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:02,676 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 00:38:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-26 00:38:02,676 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:02,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1156874401, now seen corresponding path program 1 times [2022-11-26 00:38:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670985722] [2022-11-26 00:38:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:02,878 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 00:38:02,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:02,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670985722] [2022-11-26 00:38:02,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670985722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:02,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605520753] [2022-11-26 00:38:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:02,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:02,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:02,885 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:02,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:38:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:38:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:03,185 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 00:38:03,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:03,527 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 00:38:03,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605520753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:03,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1502261093] [2022-11-26 00:38:03,546 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-26 00:38:03,546 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:03,550 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-26 00:38:03,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:03,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-26 00:38:03,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983088605] [2022-11-26 00:38:03,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:03,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:38:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:38:03,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:38:03,555 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 00:38:04,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:04,179 INFO L93 Difference]: Finished difference Result 177 states and 247 transitions. [2022-11-26 00:38:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:38:04,180 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 00:38:04,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:04,188 INFO L225 Difference]: With dead ends: 177 [2022-11-26 00:38:04,189 INFO L226 Difference]: Without dead ends: 144 [2022-11-26 00:38:04,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-26 00:38:04,201 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 00:38:04,203 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 00:38:04,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-26 00:38:04,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2022-11-26 00:38:04,253 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 00:38:04,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2022-11-26 00:38:04,264 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 29 [2022-11-26 00:38:04,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:04,265 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2022-11-26 00:38:04,266 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 00:38:04,267 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2022-11-26 00:38:04,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-26 00:38:04,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:04,270 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 00:38:04,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:04,477 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -969835265, now seen corresponding path program 2 times [2022-11-26 00:38:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:04,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974602039] [2022-11-26 00:38:04,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:04,591 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 00:38:04,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:04,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974602039] [2022-11-26 00:38:04,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974602039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:04,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944072824] [2022-11-26 00:38:04,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:38:04,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:04,594 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:04,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:38:04,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-26 00:38:04,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:04,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-26 00:38:04,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:04,720 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 00:38:04,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:38:04,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944072824] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:04,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:38:04,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-26 00:38:04,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495992949] [2022-11-26 00:38:04,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:04,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:04,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:04,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:04,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:38:04,728 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 00:38:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:04,792 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2022-11-26 00:38:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:04,792 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 00:38:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:04,795 INFO L225 Difference]: With dead ends: 152 [2022-11-26 00:38:04,795 INFO L226 Difference]: Without dead ends: 151 [2022-11-26 00:38:04,807 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 00:38:04,808 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 00:38:04,809 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 00:38:04,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-26 00:38:04,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2022-11-26 00:38:04,837 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 00:38:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2022-11-26 00:38:04,839 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 41 [2022-11-26 00:38:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:04,840 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2022-11-26 00:38:04,840 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 00:38:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2022-11-26 00:38:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-26 00:38:04,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:04,842 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 00:38:04,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:05,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:05,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash -122072, now seen corresponding path program 1 times [2022-11-26 00:38:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:05,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919778513] [2022-11-26 00:38:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:05,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:05,221 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 00:38:05,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919778513] [2022-11-26 00:38:05,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919778513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:05,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920283512] [2022-11-26 00:38:05,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:05,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:05,224 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:05,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:38:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-26 00:38:05,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:05,540 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 00:38:05,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:05,809 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 00:38:05,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920283512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:05,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [867228355] [2022-11-26 00:38:05,817 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:05,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:05,818 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 00:38:05,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:05,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 21 [2022-11-26 00:38:05,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033563822] [2022-11-26 00:38:05,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:05,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-26 00:38:05,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:05,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-26 00:38:05,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-11-26 00:38:05,828 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 00:38:06,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:06,814 INFO L93 Difference]: Finished difference Result 402 states and 604 transitions. [2022-11-26 00:38:06,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-26 00:38:06,815 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 00:38:06,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:06,818 INFO L225 Difference]: With dead ends: 402 [2022-11-26 00:38:06,818 INFO L226 Difference]: Without dead ends: 280 [2022-11-26 00:38:06,821 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 00:38:06,821 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 00:38:06,822 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 00:38:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-11-26 00:38:06,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 231. [2022-11-26 00:38:06,879 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 00:38:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2022-11-26 00:38:06,882 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 42 [2022-11-26 00:38:06,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:06,885 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2022-11-26 00:38:06,885 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 00:38:06,885 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2022-11-26 00:38:06,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-26 00:38:06,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:06,898 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 00:38:06,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-26 00:38:07,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1315751957, now seen corresponding path program 1 times [2022-11-26 00:38:07,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065436910] [2022-11-26 00:38:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:07,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:07,230 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 00:38:07,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:07,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065436910] [2022-11-26 00:38:07,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065436910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:38:07,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:38:07,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:38:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246914321] [2022-11-26 00:38:07,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:38:07,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-26 00:38:07,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-26 00:38:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-26 00:38:07,235 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 00:38:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:07,298 INFO L93 Difference]: Finished difference Result 247 states and 361 transitions. [2022-11-26 00:38:07,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:38:07,299 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 00:38:07,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:07,302 INFO L225 Difference]: With dead ends: 247 [2022-11-26 00:38:07,302 INFO L226 Difference]: Without dead ends: 246 [2022-11-26 00:38:07,303 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 00:38:07,304 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 00:38:07,304 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 00:38:07,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-26 00:38:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2022-11-26 00:38:07,352 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 00:38:07,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 352 transitions. [2022-11-26 00:38:07,357 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 352 transitions. Word has length 55 [2022-11-26 00:38:07,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:07,357 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 352 transitions. [2022-11-26 00:38:07,358 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 00:38:07,358 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 352 transitions. [2022-11-26 00:38:07,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-26 00:38:07,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:07,361 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 00:38:07,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-26 00:38:07,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:07,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:07,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1226607356, now seen corresponding path program 1 times [2022-11-26 00:38:07,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:07,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222361327] [2022-11-26 00:38:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:07,451 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 00:38:07,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222361327] [2022-11-26 00:38:07,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222361327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:07,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627255146] [2022-11-26 00:38:07,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:07,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:07,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:07,453 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:07,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:38:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:07,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-26 00:38:07,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:07,846 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 00:38:07,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:08,187 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 00:38:08,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627255146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:08,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1695327554] [2022-11-26 00:38:08,191 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:08,191 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:08,191 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 00:38:08,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:08,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 19, 19] total 26 [2022-11-26 00:38:08,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65688082] [2022-11-26 00:38:08,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:08,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-26 00:38:08,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-26 00:38:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-11-26 00:38:08,195 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 00:38:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:09,132 INFO L93 Difference]: Finished difference Result 461 states and 707 transitions. [2022-11-26 00:38:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-26 00:38:09,133 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 00:38:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:09,136 INFO L225 Difference]: With dead ends: 461 [2022-11-26 00:38:09,136 INFO L226 Difference]: Without dead ends: 233 [2022-11-26 00:38:09,140 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 00:38:09,141 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 00:38:09,141 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 00:38:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-11-26 00:38:09,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 218. [2022-11-26 00:38:09,158 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 00:38:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 266 transitions. [2022-11-26 00:38:09,160 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 266 transitions. Word has length 79 [2022-11-26 00:38:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:09,161 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 266 transitions. [2022-11-26 00:38:09,161 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 00:38:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 266 transitions. [2022-11-26 00:38:09,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-26 00:38:09,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:09,163 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 00:38:09,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:09,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:09,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash 124755018, now seen corresponding path program 1 times [2022-11-26 00:38:09,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:09,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015388627] [2022-11-26 00:38:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:09,444 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 00:38:09,444 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015388627] [2022-11-26 00:38:09,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015388627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028131887] [2022-11-26 00:38:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:09,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:09,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:09,446 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:09,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:38:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:09,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-26 00:38:09,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:09,728 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 00:38:09,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:10,064 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 00:38:10,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028131887] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:10,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486670032] [2022-11-26 00:38:10,067 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:10,068 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:10,068 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java: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 00:38:10,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:10,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 16, 17] total 20 [2022-11-26 00:38:10,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559955319] [2022-11-26 00:38:10,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-26 00:38:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-26 00:38:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-26 00:38:10,071 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 00:38:10,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:10,454 INFO L93 Difference]: Finished difference Result 343 states and 425 transitions. [2022-11-26 00:38:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-26 00:38:10,454 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 00:38:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:10,456 INFO L225 Difference]: With dead ends: 343 [2022-11-26 00:38:10,456 INFO L226 Difference]: Without dead ends: 136 [2022-11-26 00:38:10,457 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 00:38:10,458 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 00:38:10,458 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 00:38:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-26 00:38:10,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2022-11-26 00:38:10,468 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 00:38:10,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 146 transitions. [2022-11-26 00:38:10,469 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 146 transitions. Word has length 67 [2022-11-26 00:38:10,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:10,469 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 146 transitions. [2022-11-26 00:38:10,470 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 00:38:10,470 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 146 transitions. [2022-11-26 00:38:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-26 00:38:10,470 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:10,471 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 00:38:10,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:10,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:10,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1026369843, now seen corresponding path program 2 times [2022-11-26 00:38:10,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:10,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723081858] [2022-11-26 00:38:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:10,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:10,884 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 00:38:10,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723081858] [2022-11-26 00:38:10,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723081858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124149755] [2022-11-26 00:38:10,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:38:10,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:10,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:10,886 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:10,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:38:10,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:38:10,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:38:10,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:11,053 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 00:38:11,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:11,257 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 00:38:11,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124149755] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:11,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1456117712] [2022-11-26 00:38:11,260 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:11,260 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:11,260 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 00:38:11,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:11,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2022-11-26 00:38:11,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166342003] [2022-11-26 00:38:11,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:11,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-26 00:38:11,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:11,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-26 00:38:11,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-26 00:38:11,263 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 00:38:11,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:11,367 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2022-11-26 00:38:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-26 00:38:11,368 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 00:38:11,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:11,369 INFO L225 Difference]: With dead ends: 131 [2022-11-26 00:38:11,369 INFO L226 Difference]: Without dead ends: 130 [2022-11-26 00:38:11,369 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 00:38:11,370 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 00:38:11,370 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 00:38:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-11-26 00:38:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-11-26 00:38:11,379 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 00:38:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2022-11-26 00:38:11,380 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 68 [2022-11-26 00:38:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:11,380 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2022-11-26 00:38:11,380 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 00:38:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2022-11-26 00:38:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-26 00:38:11,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:11,382 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 00:38:11,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:11,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-26 00:38:11,588 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:11,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1560851675, now seen corresponding path program 2 times [2022-11-26 00:38:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:11,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342460175] [2022-11-26 00:38:11,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:11,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:11,974 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 00:38:11,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342460175] [2022-11-26 00:38:11,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342460175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:11,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274701664] [2022-11-26 00:38:11,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:38:11,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:11,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:11,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:12,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:38:12,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-26 00:38:12,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:12,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-26 00:38:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:12,144 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 00:38:12,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:12,382 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 00:38:12,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274701664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:12,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008891409] [2022-11-26 00:38:12,388 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:12,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:12,389 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 00:38:12,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:12,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-11-26 00:38:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848163457] [2022-11-26 00:38:12,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:12,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-26 00:38:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-26 00:38:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-11-26 00:38:12,392 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 00:38:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:12,554 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2022-11-26 00:38:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-26 00:38:12,555 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 00:38:12,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:12,556 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:38:12,556 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:38:12,557 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 00:38:12,558 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 00:38:12,558 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 00:38:12,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:38:12,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-26 00:38:12,571 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 00:38:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-11-26 00:38:12,573 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 100 [2022-11-26 00:38:12,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:12,574 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-11-26 00:38:12,574 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 00:38:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-11-26 00:38:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-26 00:38:12,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:12,576 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 00:38:12,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-26 00:38:12,794 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:12,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1599005666, now seen corresponding path program 3 times [2022-11-26 00:38:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:12,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219680293] [2022-11-26 00:38:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:12,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:13,557 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 00:38:13,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219680293] [2022-11-26 00:38:13,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219680293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:13,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289545000] [2022-11-26 00:38:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-26 00:38:13,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:13,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:13,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:13,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:38:13,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-26 00:38:13,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:38:13,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-26 00:38:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:13,925 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 00:38:13,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:15,377 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 00:38:15,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289545000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:15,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440748205] [2022-11-26 00:38:15,380 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:15,380 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:15,380 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 00:38:15,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:15,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2022-11-26 00:38:15,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623673230] [2022-11-26 00:38:15,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:15,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-26 00:38:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-26 00:38:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-11-26 00:38:15,385 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 00:38:15,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:15,518 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-11-26 00:38:15,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-26 00:38:15,518 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 00:38:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:15,520 INFO L225 Difference]: With dead ends: 129 [2022-11-26 00:38:15,520 INFO L226 Difference]: Without dead ends: 128 [2022-11-26 00:38:15,520 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 00:38:15,521 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 00:38:15,521 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 00:38:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-26 00:38:15,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-11-26 00:38:15,533 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 00:38:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-11-26 00:38:15,534 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 154 [2022-11-26 00:38:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:15,535 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-11-26 00:38:15,535 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 00:38:15,535 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-11-26 00:38:15,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-11-26 00:38:15,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:38:15,542 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 00:38:15,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:15,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-26 00:38:15,749 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-26 00:38:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:38:15,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1551645558, now seen corresponding path program 4 times [2022-11-26 00:38:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:38:15,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624329493] [2022-11-26 00:38:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:38:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:38:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:19,204 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 00:38:19,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:38:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624329493] [2022-11-26 00:38:19,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624329493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:38:19,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168875527] [2022-11-26 00:38:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-26 00:38:19,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:19,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:38:19,208 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:38:19,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:38:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:38:19,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-26 00:38:19,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:38:20,014 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 00:38:20,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:38:28,273 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 00:38:28,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168875527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:38:28,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [806461158] [2022-11-26 00:38:28,276 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-26 00:38:28,277 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:38:28,277 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 00:38:28,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:38:28,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2022-11-26 00:38:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829387903] [2022-11-26 00:38:28,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:38:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-26 00:38:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:38:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-26 00:38:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2022-11-26 00:38:28,283 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 00:38:28,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:38:28,414 INFO L93 Difference]: Finished difference Result 128 states and 135 transitions. [2022-11-26 00:38:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-26 00:38:28,415 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 00:38:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:38:28,416 INFO L225 Difference]: With dead ends: 128 [2022-11-26 00:38:28,417 INFO L226 Difference]: Without dead ends: 0 [2022-11-26 00:38:28,418 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 00:38:28,419 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 00:38:28,419 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 00:38:28,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-26 00:38:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-26 00:38:28,420 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 00:38:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-26 00:38:28,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 397 [2022-11-26 00:38:28,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:38:28,421 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-26 00:38:28,421 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 00:38:28,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-26 00:38:28,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-26 00:38:28,424 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2022-11-26 00:38:28,424 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2022-11-26 00:38:28,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2022-11-26 00:38:28,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2022-11-26 00:38:28,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2022-11-26 00:38:28,425 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2022-11-26 00:38:28,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:38:28,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:38:28,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-26 00:38:29,121 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-26 00:38:29,121 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-26 00:38:29,122 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 00:38:29,122 INFO L902 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,122 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,123 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 00:38:29,123 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,123 INFO L899 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,123 INFO L899 garLoopResultBuilder]: For program point L13-5(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,124 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 00:38:29,124 INFO L899 garLoopResultBuilder]: For program point L13-7(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,124 INFO L899 garLoopResultBuilder]: For program point L13-8(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,124 INFO L899 garLoopResultBuilder]: For program point L13-9(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,124 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2022-11-26 00:38:29,124 INFO L899 garLoopResultBuilder]: For program point fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,125 INFO L899 garLoopResultBuilder]: For program point fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,125 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2022-11-26 00:38:29,125 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2022-11-26 00:38:29,125 INFO L899 garLoopResultBuilder]: For program point fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-11-26 00:38:29,125 INFO L902 garLoopResultBuilder]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2022-11-26 00:38:29,129 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 2, 1, 1, 1, 1, 1] [2022-11-26 00:38:29,131 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-26 00:38:29,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 12:38:29 BoogieIcfgContainer [2022-11-26 00:38:29,139 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-26 00:38:29,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-26 00:38:29,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-26 00:38:29,140 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-26 00:38:29,140 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:38:01" (3/4) ... [2022-11-26 00:38:29,143 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-26 00:38:29,149 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2022-11-26 00:38:29,153 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-26 00:38:29,153 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-26 00:38:29,153 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-26 00:38:29,153 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-26 00:38:29,183 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-26 00:38:29,183 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-26 00:38:29,184 INFO L158 Benchmark]: Toolchain (without parser) took 28468.26ms. Allocated memory was 165.7MB in the beginning and 415.2MB in the end (delta: 249.6MB). Free memory was 128.6MB in the beginning and 300.5MB in the end (delta: -171.9MB). Peak memory consumption was 76.1MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,184 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 121.6MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-26 00:38:29,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 293.28ms. Allocated memory is still 165.7MB. Free memory was 128.6MB in the beginning and 130.9MB in the end (delta: -2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,185 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.24ms. Allocated memory is still 165.7MB. Free memory was 130.9MB in the beginning and 129.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,185 INFO L158 Benchmark]: Boogie Preprocessor took 44.84ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 128.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,185 INFO L158 Benchmark]: RCFGBuilder took 425.32ms. Allocated memory is still 165.7MB. Free memory was 128.4MB in the beginning and 117.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,186 INFO L158 Benchmark]: TraceAbstraction took 27615.41ms. Allocated memory was 165.7MB in the beginning and 415.2MB in the end (delta: 249.6MB). Free memory was 116.5MB in the beginning and 303.6MB in the end (delta: -187.1MB). Peak memory consumption was 65.3MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,186 INFO L158 Benchmark]: Witness Printer took 44.01ms. Allocated memory is still 415.2MB. Free memory was 303.6MB in the beginning and 300.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-26 00:38:29,188 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 121.6MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 293.28ms. Allocated memory is still 165.7MB. Free memory was 128.6MB in the beginning and 130.9MB in the end (delta: -2.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.24ms. Allocated memory is still 165.7MB. Free memory was 130.9MB in the beginning and 129.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.84ms. Allocated memory is still 165.7MB. Free memory was 129.4MB in the beginning and 128.4MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 425.32ms. Allocated memory is still 165.7MB. Free memory was 128.4MB in the beginning and 117.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 27615.41ms. Allocated memory was 165.7MB in the beginning and 415.2MB in the end (delta: 249.6MB). Free memory was 116.5MB in the beginning and 303.6MB in the end (delta: -187.1MB). Peak memory consumption was 65.3MB. Max. memory is 16.1GB. * Witness Printer took 44.01ms. Allocated memory is still 415.2MB. Free memory was 303.6MB in the beginning and 300.5MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 13]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 27.5s, OverallIterations: 13, TraceHistogramMax: 41, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, 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, 1.8s 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, 3.9s 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, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 19.3s 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 00:38:29,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd0d3457-bd61-4a36-8f17-e3e5af950b6b/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE