./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh --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 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 --- 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-2329fc7 [2022-12-14 14:44:08,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:44:08,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:44:08,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:44:08,101 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:44:08,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:44:08,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:44:08,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:44:08,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:44:08,107 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:44:08,108 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:44:08,109 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:44:08,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:44:08,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:44:08,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:44:08,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:44:08,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:44:08,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:44:08,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:44:08,118 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:44:08,119 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:44:08,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:44:08,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:44:08,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:44:08,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:44:08,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:44:08,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:44:08,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:44:08,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:44:08,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:44:08,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:44:08,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:44:08,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:44:08,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:44:08,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:44:08,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:44:08,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:44:08,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:44:08,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:44:08,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:44:08,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:44:08,136 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 14:44:08,158 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:44:08,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:44:08,159 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:44:08,159 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:44:08,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:44:08,160 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:44:08,160 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:44:08,160 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:44:08,160 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:44:08,161 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:44:08,161 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:44:08,161 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:44:08,161 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:44:08,161 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:44:08,162 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:44:08,162 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:44:08,162 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:44:08,162 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:44:08,163 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:44:08,163 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:44:08,163 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 14:44:08,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:44:08,164 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 14:44:08,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:44:08,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:44:08,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:44:08,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:44:08,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:44:08,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:44:08,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:44:08,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:44:08,166 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:44:08,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:44:08,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:44:08,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:44:08,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:44:08,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:44:08,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:44:08,167 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_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02dc726982da9e300f34803a4bdbb3c0165037d3f4471bd0e009c42cfb19ed24 [2022-12-14 14:44:08,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:44:08,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:44:08,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:44:08,398 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:44:08,399 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:44:08,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2022-12-14 14:44:10,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:44:11,075 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:44:11,076 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2022-12-14 14:44:11,080 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/data/b482572f2/5d9586fe3b5748b480359c5d9521afd2/FLAGe291d18f3 [2022-12-14 14:44:11,092 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/data/b482572f2/5d9586fe3b5748b480359c5d9521afd2 [2022-12-14 14:44:11,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:44:11,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:44:11,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:44:11,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:44:11,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:44:11,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,101 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dedc2ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11, skipping insertion in model container [2022-12-14 14:44:11,101 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:44:11,116 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:44:11,220 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_613bd361-7463-4049-bcd2-ac61975edc22/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2022-12-14 14:44:11,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:44:11,228 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:44:11,238 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_613bd361-7463-4049-bcd2-ac61975edc22/sv-benchmarks/c/recursive-simple/fibo_5-2.c[740,753] [2022-12-14 14:44:11,239 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:44:11,248 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:44:11,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11 WrapperNode [2022-12-14 14:44:11,249 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:44:11,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:44:11,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:44:11,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:44:11,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,260 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,271 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-12-14 14:44:11,271 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:44:11,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:44:11,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:44:11,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:44:11,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,279 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,279 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,281 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,283 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:44:11,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:44:11,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:44:11,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:44:11,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (1/1) ... [2022-12-14 14:44:11,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:44:11,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:11,307 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:44:11,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:44:11,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:44:11,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:44:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:44:11,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:44:11,341 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-12-14 14:44:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-12-14 14:44:11,393 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:44:11,395 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:44:11,493 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:44:11,521 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:44:11,521 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 14:44:11,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:44:11 BoogieIcfgContainer [2022-12-14 14:44:11,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:44:11,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:44:11,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:44:11,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:44:11,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:44:11" (1/3) ... [2022-12-14 14:44:11,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663f7493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:44:11, skipping insertion in model container [2022-12-14 14:44:11,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:44:11" (2/3) ... [2022-12-14 14:44:11,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@663f7493 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:44:11, skipping insertion in model container [2022-12-14 14:44:11,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:44:11" (3/3) ... [2022-12-14 14:44:11,534 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_5-2.c [2022-12-14 14:44:11,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:44:11,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 14:44:11,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:44:11,609 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;@74e1207, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:44:11,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 14:44:11,613 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) [2022-12-14 14:44:11,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 14:44:11,621 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:11,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 14:44:11,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1907138082, now seen corresponding path program 1 times [2022-12-14 14:44:11,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612812415] [2022-12-14 14:44:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:11,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:11,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:11,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612812415] [2022-12-14 14:44:11,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612812415] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:11,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:11,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 14:44:11,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811271068] [2022-12-14 14:44:11,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:11,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:44:11,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:11,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:44:11,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:44:11,836 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) [2022-12-14 14:44:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:11,886 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-12-14 14:44:11,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:44:11,889 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 [2022-12-14 14:44:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:11,895 INFO L225 Difference]: With dead ends: 27 [2022-12-14 14:44:11,895 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 14:44:11,898 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 [2022-12-14 14:44:11,902 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 [2022-12-14 14:44:11,903 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] [2022-12-14 14:44:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 14:44:11,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-12-14 14:44:11,934 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) [2022-12-14 14:44:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 14:44:11,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2022-12-14 14:44:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:11,937 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 14:44:11,937 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) [2022-12-14 14:44:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 14:44:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 14:44:11,939 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:11,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:11,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:44:11,940 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:11,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1008261661, now seen corresponding path program 1 times [2022-12-14 14:44:11,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:11,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984156468] [2022-12-14 14:44:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:11,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:12,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:12,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984156468] [2022-12-14 14:44:12,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984156468] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:12,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:12,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:44:12,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299745091] [2022-12-14 14:44:12,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:12,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:44:12,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:44:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:44:12,014 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) [2022-12-14 14:44:12,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:12,061 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 14:44:12,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:44:12,062 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 [2022-12-14 14:44:12,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:12,062 INFO L225 Difference]: With dead ends: 21 [2022-12-14 14:44:12,062 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 14:44:12,063 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 [2022-12-14 14:44:12,065 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, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:12,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 17 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:44:12,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 14:44:12,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 14:44:12,070 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) [2022-12-14 14:44:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-12-14 14:44:12,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2022-12-14 14:44:12,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:12,072 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-12-14 14:44:12,072 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) [2022-12-14 14:44:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-12-14 14:44:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 14:44:12,073 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:12,073 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:12,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:44:12,074 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:12,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1283862660, now seen corresponding path program 1 times [2022-12-14 14:44:12,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:12,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518663192] [2022-12-14 14:44:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:44:12,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:12,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518663192] [2022-12-14 14:44:12,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518663192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:12,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:12,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:44:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306692804] [2022-12-14 14:44:12,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:12,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:44:12,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:12,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:44:12,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:44:12,241 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) [2022-12-14 14:44:12,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:12,277 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-12-14 14:44:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:44:12,278 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 [2022-12-14 14:44:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:12,279 INFO L225 Difference]: With dead ends: 35 [2022-12-14 14:44:12,279 INFO L226 Difference]: Without dead ends: 33 [2022-12-14 14:44:12,280 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 [2022-12-14 14:44:12,281 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 [2022-12-14 14:44:12,282 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] [2022-12-14 14:44:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-12-14 14:44:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-12-14 14:44:12,289 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) [2022-12-14 14:44:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-12-14 14:44:12,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2022-12-14 14:44:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:12,291 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-12-14 14:44:12,291 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) [2022-12-14 14:44:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-12-14 14:44:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 14:44:12,293 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:12,293 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:44:12,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1156874401, now seen corresponding path program 1 times [2022-12-14 14:44:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:12,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790076476] [2022-12-14 14:44:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:44:12,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790076476] [2022-12-14 14:44:12,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790076476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:12,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934731608] [2022-12-14 14:44:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:12,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:12,409 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:12,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:44:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:12,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:44:12,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:44:12,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:12,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 14:44:12,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934731608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1083294042] [2022-12-14 14:44:12,721 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 14:44:12,721 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:12,725 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) [2022-12-14 14:44:12,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:12,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-12-14 14:44:12,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160721361] [2022-12-14 14:44:12,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:12,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 14:44:12,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:12,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 14:44:12,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:44:12,730 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) [2022-12-14 14:44:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:13,084 INFO L93 Difference]: Finished difference Result 177 states and 247 transitions. [2022-12-14 14:44:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 14:44:13,084 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 [2022-12-14 14:44:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:13,086 INFO L225 Difference]: With dead ends: 177 [2022-12-14 14:44:13,086 INFO L226 Difference]: Without dead ends: 144 [2022-12-14 14:44:13,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-12-14 14:44:13,088 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:13,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 233 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:44:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-12-14 14:44:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2022-12-14 14:44:13,112 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) [2022-12-14 14:44:13,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 173 transitions. [2022-12-14 14:44:13,115 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 173 transitions. Word has length 29 [2022-12-14 14:44:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:13,116 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 173 transitions. [2022-12-14 14:44:13,116 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) [2022-12-14 14:44:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 173 transitions. [2022-12-14 14:44:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 14:44:13,118 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:13,118 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:13,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:44:13,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:13,324 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash -969835265, now seen corresponding path program 2 times [2022-12-14 14:44:13,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:13,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108802640] [2022-12-14 14:44:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:13,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:13,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:44:13,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:13,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108802640] [2022-12-14 14:44:13,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108802640] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:13,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090612071] [2022-12-14 14:44:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:44:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:13,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:13,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:44:13,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:44:13,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 14:44:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:13,573 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:44:13,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:44:13,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090612071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:13,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:44:13,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 14:44:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567820111] [2022-12-14 14:44:13,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:13,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:44:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:44:13,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:44:13,576 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) [2022-12-14 14:44:13,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:13,607 INFO L93 Difference]: Finished difference Result 152 states and 209 transitions. [2022-12-14 14:44:13,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:44:13,608 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 [2022-12-14 14:44:13,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:13,609 INFO L225 Difference]: With dead ends: 152 [2022-12-14 14:44:13,610 INFO L226 Difference]: Without dead ends: 151 [2022-12-14 14:44:13,610 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 [2022-12-14 14:44:13,610 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 [2022-12-14 14:44:13,611 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] [2022-12-14 14:44:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-12-14 14:44:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 136. [2022-12-14 14:44:13,625 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) [2022-12-14 14:44:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 189 transitions. [2022-12-14 14:44:13,627 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 189 transitions. Word has length 41 [2022-12-14 14:44:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:13,627 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 189 transitions. [2022-12-14 14:44:13,627 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) [2022-12-14 14:44:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 189 transitions. [2022-12-14 14:44:13,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 14:44:13,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:13,628 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] [2022-12-14 14:44:13,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:44:13,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:13,829 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:13,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -122072, now seen corresponding path program 1 times [2022-12-14 14:44:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:13,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712972421] [2022-12-14 14:44:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:44:13,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712972421] [2022-12-14 14:44:13,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712972421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413951211] [2022-12-14 14:44:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:13,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:13,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:13,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:13,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:44:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:13,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:44:13,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-12-14 14:44:13,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:44:13,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413951211] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:13,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:44:13,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-14 14:44:13,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491048106] [2022-12-14 14:44:13,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:13,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:44:13,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:13,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:44:13,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:44:13,994 INFO L87 Difference]: Start difference. First operand 136 states and 189 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-12-14 14:44:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:14,036 INFO L93 Difference]: Finished difference Result 207 states and 325 transitions. [2022-12-14 14:44:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:44:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 42 [2022-12-14 14:44:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:14,038 INFO L225 Difference]: With dead ends: 207 [2022-12-14 14:44:14,038 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 14:44:14,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 14:44:14,039 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:44:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 14:44:14,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-12-14 14:44:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.0924369747899159) internal successors, (130), 118 states have internal predecessors, (130), 19 states have call successors, (19), 5 states have call predecessors, (19), 12 states have return successors, (76), 28 states have call predecessors, (76), 18 states have call successors, (76) [2022-12-14 14:44:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 225 transitions. [2022-12-14 14:44:14,057 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 225 transitions. Word has length 42 [2022-12-14 14:44:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:14,057 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 225 transitions. [2022-12-14 14:44:14,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2022-12-14 14:44:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 225 transitions. [2022-12-14 14:44:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 14:44:14,058 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:14,058 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:14,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:44:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:14,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash 363179393, now seen corresponding path program 1 times [2022-12-14 14:44:14,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679836999] [2022-12-14 14:44:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:14,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 14:44:14,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:14,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679836999] [2022-12-14 14:44:14,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679836999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:14,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:44:14,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:44:14,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253177755] [2022-12-14 14:44:14,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:14,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:44:14,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:44:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:44:14,310 INFO L87 Difference]: Start difference. First operand 152 states and 225 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) [2022-12-14 14:44:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:14,346 INFO L93 Difference]: Finished difference Result 181 states and 269 transitions. [2022-12-14 14:44:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:44:14,347 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 43 [2022-12-14 14:44:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:14,348 INFO L225 Difference]: With dead ends: 181 [2022-12-14 14:44:14,348 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 14:44:14,348 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 [2022-12-14 14:44:14,349 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:14,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 69 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:44:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 14:44:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 163. [2022-12-14 14:44:14,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.0859375) internal successors, (139), 126 states have internal predecessors, (139), 21 states have call successors, (21), 5 states have call predecessors, (21), 12 states have return successors, (88), 31 states have call predecessors, (88), 20 states have call successors, (88) [2022-12-14 14:44:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 248 transitions. [2022-12-14 14:44:14,364 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 248 transitions. Word has length 43 [2022-12-14 14:44:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:14,364 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 248 transitions. [2022-12-14 14:44:14,365 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) [2022-12-14 14:44:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 248 transitions. [2022-12-14 14:44:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 14:44:14,366 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:14,366 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 14:44:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:44:14,367 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1474386708, now seen corresponding path program 1 times [2022-12-14 14:44:14,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:14,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407975917] [2022-12-14 14:44:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:14,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-12-14 14:44:14,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:14,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407975917] [2022-12-14 14:44:14,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407975917] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:14,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349913477] [2022-12-14 14:44:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:14,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:14,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:14,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:14,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:44:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:14,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 14:44:14,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:14,582 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 46 proven. 63 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:44:14,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 46 proven. 63 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:44:14,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349913477] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:14,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061889618] [2022-12-14 14:44:14,725 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 14:44:14,726 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:14,726 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) [2022-12-14 14:44:14,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:14,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 13, 13] total 17 [2022-12-14 14:44:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623401285] [2022-12-14 14:44:14,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:14,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 14:44:14,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:14,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 14:44:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:44:14,730 INFO L87 Difference]: Start difference. First operand 163 states and 248 transitions. Second operand has 17 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:15,005 INFO L93 Difference]: Finished difference Result 294 states and 466 transitions. [2022-12-14 14:44:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 14:44:15,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2022-12-14 14:44:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:15,007 INFO L225 Difference]: With dead ends: 294 [2022-12-14 14:44:15,008 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 14:44:15,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2022-12-14 14:44:15,013 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 204 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:15,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 63 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:44:15,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 14:44:15,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2022-12-14 14:44:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 97 states have internal predecessors, (102), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (30), 20 states have call predecessors, (30), 15 states have call successors, (30) [2022-12-14 14:44:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2022-12-14 14:44:15,027 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 61 [2022-12-14 14:44:15,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:15,027 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2022-12-14 14:44:15,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.875) internal successors, (62), 13 states have internal predecessors, (62), 8 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:44:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2022-12-14 14:44:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-12-14 14:44:15,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:15,029 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 14:44:15,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:44:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:15,230 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:15,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:15,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1612614841, now seen corresponding path program 1 times [2022-12-14 14:44:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:15,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823282999] [2022-12-14 14:44:15,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:15,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-12-14 14:44:15,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823282999] [2022-12-14 14:44:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823282999] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760553054] [2022-12-14 14:44:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:15,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:15,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:15,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:44:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:44:15,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 14:44:15,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 14:44:15,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760553054] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:15,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694851223] [2022-12-14 14:44:15,618 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 14:44:15,618 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:15,619 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) [2022-12-14 14:44:15,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:15,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2022-12-14 14:44:15,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034215751] [2022-12-14 14:44:15,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:15,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 14:44:15,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:15,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 14:44:15,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-12-14 14:44:15,621 INFO L87 Difference]: Start difference. First operand 123 states and 148 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) [2022-12-14 14:44:15,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:15,734 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2022-12-14 14:44:15,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 14:44:15,734 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 56 [2022-12-14 14:44:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:15,736 INFO L225 Difference]: With dead ends: 136 [2022-12-14 14:44:15,736 INFO L226 Difference]: Without dead ends: 134 [2022-12-14 14:44:15,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-12-14 14:44:15,737 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:15,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 114 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:44:15,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-12-14 14:44:15,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 123. [2022-12-14 14:44:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 97 states have internal predecessors, (100), 16 states have call successors, (16), 5 states have call predecessors, (16), 10 states have return successors, (30), 20 states have call predecessors, (30), 15 states have call successors, (30) [2022-12-14 14:44:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2022-12-14 14:44:15,750 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 56 [2022-12-14 14:44:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:15,750 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2022-12-14 14:44:15,750 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) [2022-12-14 14:44:15,751 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2022-12-14 14:44:15,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:44:15,753 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:15,753 INFO L195 NwaCegarLoop]: trace histogram [9, 6, 6, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 14:44:15,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 14:44:15,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:15,960 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:15,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 849057407, now seen corresponding path program 2 times [2022-12-14 14:44:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:15,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804684785] [2022-12-14 14:44:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 51 proven. 69 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 14:44:16,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:16,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804684785] [2022-12-14 14:44:16,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804684785] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:16,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176631111] [2022-12-14 14:44:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:44:16,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:16,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:16,169 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:16,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:44:16,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 14:44:16,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:16,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:44:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-12-14 14:44:16,260 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:44:16,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176631111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:44:16,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:44:16,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2022-12-14 14:44:16,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857328916] [2022-12-14 14:44:16,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:44:16,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:44:16,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:44:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-12-14 14:44:16,262 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 14:44:16,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:16,310 INFO L93 Difference]: Finished difference Result 190 states and 230 transitions. [2022-12-14 14:44:16,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:44:16,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 14:44:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:16,311 INFO L225 Difference]: With dead ends: 190 [2022-12-14 14:44:16,311 INFO L226 Difference]: Without dead ends: 81 [2022-12-14 14:44:16,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:44:16,312 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:16,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:44:16,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-12-14 14:44:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-12-14 14:44:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 63 states have internal predecessors, (65), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 14:44:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2022-12-14 14:44:16,319 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 73 [2022-12-14 14:44:16,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:16,320 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2022-12-14 14:44:16,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 14:44:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2022-12-14 14:44:16,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-12-14 14:44:16,321 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:16,321 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1] [2022-12-14 14:44:16,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:44:16,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:16,522 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:16,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:16,523 INFO L85 PathProgramCache]: Analyzing trace with hash 552578799, now seen corresponding path program 3 times [2022-12-14 14:44:16,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:16,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063027694] [2022-12-14 14:44:16,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:16,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:16,716 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 14:44:16,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:16,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063027694] [2022-12-14 14:44:16,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063027694] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:16,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708733988] [2022-12-14 14:44:16,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 14:44:16,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:16,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:16,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:44:16,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 14:44:16,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:16,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:44:16,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:16,836 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 14:44:16,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-12-14 14:44:16,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708733988] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1559667707] [2022-12-14 14:44:16,977 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 14:44:16,977 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:16,977 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 14:44:16,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:16,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2022-12-14 14:44:16,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909407798] [2022-12-14 14:44:16,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:16,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 14:44:16,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 14:44:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-12-14 14:44:16,979 INFO L87 Difference]: Start difference. First operand 79 states and 86 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) [2022-12-14 14:44:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:17,069 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-12-14 14:44:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 14:44:17,069 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 88 [2022-12-14 14:44:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:17,070 INFO L225 Difference]: With dead ends: 79 [2022-12-14 14:44:17,070 INFO L226 Difference]: Without dead ends: 78 [2022-12-14 14:44:17,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 171 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2022-12-14 14:44:17,071 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:17,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 138 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:44:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-14 14:44:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-12-14 14:44:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-12-14 14:44:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-12-14 14:44:17,077 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 88 [2022-12-14 14:44:17,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:17,077 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-12-14 14:44:17,078 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) [2022-12-14 14:44:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-12-14 14:44:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-12-14 14:44:17,079 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:44:17,079 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1] [2022-12-14 14:44:17,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:44:17,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 14:44:17,281 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 14:44:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:44:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1374633778, now seen corresponding path program 2 times [2022-12-14 14:44:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:44:17,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781557492] [2022-12-14 14:44:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:44:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:44:17,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:44:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-12-14 14:44:17,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:44:17,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781557492] [2022-12-14 14:44:17,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781557492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:44:17,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429682739] [2022-12-14 14:44:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:44:17,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:44:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:44:17,604 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:44:17,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:44:17,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-12-14 14:44:17,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:44:17,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 14:44:17,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:44:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-12-14 14:44:17,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:44:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-12-14 14:44:18,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429682739] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:44:18,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [95767107] [2022-12-14 14:44:18,639 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 14:44:18,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:44:18,639 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) [2022-12-14 14:44:18,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:44:18,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2022-12-14 14:44:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299912871] [2022-12-14 14:44:18,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:44:18,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 14:44:18,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:44:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 14:44:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-12-14 14:44:18,641 INFO L87 Difference]: Start difference. First operand 78 states and 84 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) [2022-12-14 14:44:18,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:44:18,703 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-12-14 14:44:18,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 14:44:18,704 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 142 [2022-12-14 14:44:18,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:44:18,704 INFO L225 Difference]: With dead ends: 78 [2022-12-14 14:44:18,704 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 14:44:18,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 268 SyntacticMatches, 13 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=804, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 14:44:18,706 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:44:18,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 164 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:44:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 14:44:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 14:44:18,707 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) [2022-12-14 14:44:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 14:44:18,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2022-12-14 14:44:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:44:18,707 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 14:44:18,707 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) [2022-12-14 14:44:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 14:44:18,707 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 14:44:18,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2022-12-14 14:44:18,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2022-12-14 14:44:18,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2022-12-14 14:44:18,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2022-12-14 14:44:18,709 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2022-12-14 14:44:18,710 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2022-12-14 14:44:18,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:44:18,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 14:44:18,916 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 14:44:19,302 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 14:44:19,303 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= 5 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 5)) [2022-12-14 14:44:19,303 INFO L902 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: true [2022-12-14 14:44:19,303 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 14:44:19,303 INFO L899 garLoopResultBuilder]: For program point fiboErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,303 INFO L899 garLoopResultBuilder]: For program point fiboErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,303 INFO L899 garLoopResultBuilder]: For program point fiboErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point L13-1(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L895 garLoopResultBuilder]: At program point L13-2(line 13) the Hoare annotation is: (and (or (not (<= |fibo_#in~n| 4)) (<= fibo_~n |fibo_#in~n|)) (or (and (<= |fibo_#in~n| fibo_~n) (<= fibo_~n 5)) (not (<= |fibo_#in~n| 5))) (or (and (not (= fibo_~n 1)) (<= 1 |fibo_#in~n|)) (not (<= |fibo_#in~n| 2)))) [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point L13-3(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 7 15) the Hoare annotation is: true [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point L13-4(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,304 INFO L899 garLoopResultBuilder]: For program point L13-5(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,305 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 (<= |fibo_#in~n| 5)) (not (<= 5 |fibo_#in~n|)) (and .cse0 .cse1 (<= |fibo_#t~ret4| 3) (<= fibo_~n 5))) (or (not (<= |fibo_#in~n| 4)) (and .cse2 .cse0 (<= |fibo_#t~ret4| 2) .cse1) (not (<= 4 |fibo_#in~n|))) (or (and .cse2 .cse0 (= |fibo_#t~ret4| 1)) (not (<= |fibo_#in~n| 3))) (or (and (not (= fibo_~n 1)) (<= 1 |fibo_#in~n|)) (not (<= |fibo_#in~n| 2))))) [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point L13-7(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point L13-8(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point L13-9(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point fiboErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,305 INFO L899 garLoopResultBuilder]: For program point fiboErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,306 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 14) no Hoare annotation was computed. [2022-12-14 14:44:19,306 INFO L899 garLoopResultBuilder]: For program point L8(lines 8 14) no Hoare annotation was computed. [2022-12-14 14:44:19,306 INFO L899 garLoopResultBuilder]: For program point fiboErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 13) no Hoare annotation was computed. [2022-12-14 14:44:19,309 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 14:44:19,311 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 14:44:19,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 02:44:19 BoogieIcfgContainer [2022-12-14 14:44:19,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 14:44:19,319 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 14:44:19,319 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 14:44:19,319 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 14:44:19,320 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:44:11" (3/4) ... [2022-12-14 14:44:19,322 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 14:44:19,326 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo [2022-12-14 14:44:19,328 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-12-14 14:44:19,329 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-12-14 14:44:19,329 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 14:44:19,329 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 14:44:19,351 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 14:44:19,351 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 14:44:19,352 INFO L158 Benchmark]: Toolchain (without parser) took 8256.45ms. Allocated memory was 136.3MB in the beginning and 203.4MB in the end (delta: 67.1MB). Free memory was 85.9MB in the beginning and 96.3MB in the end (delta: -10.4MB). Peak memory consumption was 58.3MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,352 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 136.3MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:44:19,353 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.56ms. Allocated memory is still 136.3MB. Free memory was 85.7MB in the beginning and 75.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,353 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.76ms. Allocated memory is still 136.3MB. Free memory was 75.9MB in the beginning and 74.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,353 INFO L158 Benchmark]: Boogie Preprocessor took 12.43ms. Allocated memory is still 136.3MB. Free memory was 74.5MB in the beginning and 73.5MB in the end (delta: 977.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 14:44:19,353 INFO L158 Benchmark]: RCFGBuilder took 239.89ms. Allocated memory is still 136.3MB. Free memory was 73.5MB in the beginning and 62.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,354 INFO L158 Benchmark]: TraceAbstraction took 7791.46ms. Allocated memory was 136.3MB in the beginning and 203.4MB in the end (delta: 67.1MB). Free memory was 61.7MB in the beginning and 99.5MB in the end (delta: -37.7MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,354 INFO L158 Benchmark]: Witness Printer took 32.55ms. Allocated memory is still 203.4MB. Free memory was 99.5MB in the beginning and 96.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 14:44:19,356 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 136.3MB. Free memory is still 111.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 152.56ms. Allocated memory is still 136.3MB. Free memory was 85.7MB in the beginning and 75.9MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.76ms. Allocated memory is still 136.3MB. Free memory was 75.9MB in the beginning and 74.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.43ms. Allocated memory is still 136.3MB. Free memory was 74.5MB in the beginning and 73.5MB in the end (delta: 977.3kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 239.89ms. Allocated memory is still 136.3MB. Free memory was 73.5MB in the beginning and 62.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7791.46ms. Allocated memory was 136.3MB in the beginning and 203.4MB in the end (delta: 67.1MB). Free memory was 61.7MB in the beginning and 99.5MB in the end (delta: -37.7MB). Peak memory consumption was 31.0MB. Max. memory is 16.1GB. * Witness Printer took 32.55ms. Allocated memory is still 203.4MB. Free memory was 99.5MB in the beginning and 96.3MB 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: 7.7s, OverallIterations: 12, TraceHistogramMax: 15, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 534 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 513 mSDsluCounter, 1000 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 774 mSDsCounter, 178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1363 IncrementalHoareTripleChecker+Invalid, 1541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 178 mSolverCounterUnsat, 226 mSDtfsCounter, 1363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1040 GetRequests, 845 SyntacticMatches, 30 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163occurred in iteration=7, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 144 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 137 PreInvPairs, 190 NumberOfFragments, 116 HoareAnnotationTreeSize, 137 FomulaSimplifications, 1419 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 5 FomulaSimplificationsInter, 692 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1148 NumberOfCodeBlocks, 1078 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 1499 ConstructedInterpolants, 0 QuantifiedInterpolants, 3252 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1061 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 25 InterpolantComputations, 7 PerfectInterpolantSequences, 3312/4105 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! [2022-12-14 14:44:19,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_613bd361-7463-4049-bcd2-ac61975edc22/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE