./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/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_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/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_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/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 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a --- 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 13:45:04,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:45:04,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:45:04,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:45:04,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:45:04,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:45:04,623 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:45:04,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:45:04,625 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:45:04,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:45:04,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:45:04,627 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:45:04,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:45:04,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:45:04,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:45:04,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:45:04,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:45:04,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:45:04,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:45:04,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:45:04,635 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:45:04,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:45:04,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:45:04,637 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:45:04,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:45:04,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:45:04,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:45:04,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:45:04,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:45:04,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:45:04,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:45:04,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:45:04,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:45:04,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:45:04,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:45:04,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:45:04,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:45:04,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:45:04,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:45:04,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:45:04,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:45:04,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 13:45:04,664 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:45:04,664 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:45:04,665 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:45:04,665 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:45:04,665 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:45:04,666 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:45:04,666 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:45:04,666 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:45:04,666 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:45:04,666 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:45:04,667 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:45:04,667 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:45:04,667 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:45:04,667 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:45:04,667 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:45:04,668 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:45:04,668 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:45:04,668 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:45:04,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:45:04,669 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:45:04,669 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 13:45:04,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:45:04,669 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:45:04,669 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:45:04,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:45:04,671 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:45:04,671 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:45:04,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:45:04,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:45:04,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:45:04,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:45:04,672 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:45:04,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:45:04,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:45:04,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:45:04,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:45:04,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:45:04,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:45:04,673 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_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31de98bafea1eb3233157f378400eba30060b6561e9e0a6257ecfebe8e53877a [2022-12-14 13:45:04,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:45:04,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:45:04,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:45:04,863 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:45:04,863 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:45:04,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2022-12-14 13:45:07,420 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:45:07,552 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:45:07,552 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2022-12-14 13:45:07,557 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/data/92cba7ac5/2d22e396b957437f9e05c75037ae8800/FLAGb4a75d357 [2022-12-14 13:45:07,570 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/data/92cba7ac5/2d22e396b957437f9e05c75037ae8800 [2022-12-14 13:45:07,572 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:45:07,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:45:07,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:45:07,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:45:07,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:45:07,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@197482ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07, skipping insertion in model container [2022-12-14 13:45:07,580 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:45:07,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:45:07,719 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_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c[946,959] [2022-12-14 13:45:07,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:45:07,730 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:45:07,743 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_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c[946,959] [2022-12-14 13:45:07,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:45:07,754 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:45:07,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07 WrapperNode [2022-12-14 13:45:07,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:45:07,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:45:07,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:45:07,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:45:07,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,779 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-12-14 13:45:07,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:45:07,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:45:07,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:45:07,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:45:07,787 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,789 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,794 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:45:07,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:45:07,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:45:07,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:45:07,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (1/1) ... [2022-12-14 13:45:07,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:45:07,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:07,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:45:07,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:45:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:45:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:45:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-12-14 13:45:07,861 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-12-14 13:45:07,861 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-12-14 13:45:07,862 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-12-14 13:45:07,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:45:07,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:45:07,923 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:45:07,925 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:45:08,063 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:45:08,082 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:45:08,082 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 13:45:08,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:45:08 BoogieIcfgContainer [2022-12-14 13:45:08,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:45:08,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:45:08,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:45:08,094 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:45:08,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:45:07" (1/3) ... [2022-12-14 13:45:08,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1528a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:45:08, skipping insertion in model container [2022-12-14 13:45:08,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:45:07" (2/3) ... [2022-12-14 13:45:08,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1528a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:45:08, skipping insertion in model container [2022-12-14 13:45:08,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:45:08" (3/3) ... [2022-12-14 13:45:08,097 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c [2022-12-14 13:45:08,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:45:08,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-12-14 13:45:08,151 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:45:08,157 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;@69975e15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:45:08,157 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-12-14 13:45:08,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 13:45:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 13:45:08,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:08,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 13:45:08,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1023451622, now seen corresponding path program 1 times [2022-12-14 13:45:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:08,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699842734] [2022-12-14 13:45:08,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:08,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:08,304 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 13:45:08,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:08,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699842734] [2022-12-14 13:45:08,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699842734] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:08,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:08,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:45:08,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688518135] [2022-12-14 13:45:08,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:08,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:45:08,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:45:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:45:08,340 INFO L87 Difference]: Start difference. First operand has 46 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 38 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 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 13:45:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:08,389 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-12-14 13:45:08,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:45:08,392 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 13:45:08,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:08,402 INFO L225 Difference]: With dead ends: 48 [2022-12-14 13:45:08,402 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 13:45:08,405 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 13:45:08,409 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 14 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:08,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 74 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 13:45:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-14 13:45:08,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 13:45:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-12-14 13:45:08,450 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2022-12-14 13:45:08,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:08,451 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-12-14 13:45:08,451 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 13:45:08,451 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-12-14 13:45:08,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:45:08,452 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:08,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:08,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:45:08,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:08,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:08,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1662229125, now seen corresponding path program 1 times [2022-12-14 13:45:08,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:08,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195621374] [2022-12-14 13:45:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:08,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:08,509 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 13:45:08,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195621374] [2022-12-14 13:45:08,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195621374] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:08,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:08,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 13:45:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925433986] [2022-12-14 13:45:08,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:08,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:08,513 INFO L87 Difference]: Start difference. First operand 42 states and 48 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 13:45:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:08,583 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-12-14 13:45:08,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:45:08,584 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 13:45:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:08,585 INFO L225 Difference]: With dead ends: 63 [2022-12-14 13:45:08,585 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 13:45:08,586 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 13:45:08,587 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:08,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:08,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 13:45:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-12-14 13:45:08,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 45 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 13:45:08,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-14 13:45:08,599 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-12-14 13:45:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:08,599 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-14 13:45:08,600 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 13:45:08,600 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-14 13:45:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 13:45:08,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:08,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:08,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 13:45:08,601 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:08,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash -942893292, now seen corresponding path program 1 times [2022-12-14 13:45:08,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:08,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120328216] [2022-12-14 13:45:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:08,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:08,642 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 13:45:08,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:08,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120328216] [2022-12-14 13:45:08,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120328216] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:08,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:08,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:45:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955585678] [2022-12-14 13:45:08,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:08,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:45:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:08,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:45:08,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:45:08,645 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:45:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:08,669 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-12-14 13:45:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:45:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-12-14 13:45:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:08,671 INFO L225 Difference]: With dead ends: 57 [2022-12-14 13:45:08,671 INFO L226 Difference]: Without dead ends: 55 [2022-12-14 13:45:08,672 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 13:45:08,673 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:08,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 66 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:08,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-12-14 13:45:08,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-12-14 13:45:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 43 states have internal predecessors, (49), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 13:45:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-12-14 13:45:08,683 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2022-12-14 13:45:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:08,684 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-12-14 13:45:08,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:45:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-12-14 13:45:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 13:45:08,685 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:08,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 13:45:08,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:08,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:08,687 INFO L85 PathProgramCache]: Analyzing trace with hash 835079079, now seen corresponding path program 1 times [2022-12-14 13:45:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:08,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606727548] [2022-12-14 13:45:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:08,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:08,774 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 13:45:08,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:08,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606727548] [2022-12-14 13:45:08,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606727548] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:08,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:08,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 13:45:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634533025] [2022-12-14 13:45:08,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:45:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:45:08,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-14 13:45:08,778 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:45:08,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:08,869 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-12-14 13:45:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:45:08,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-14 13:45:08,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:08,871 INFO L225 Difference]: With dead ends: 53 [2022-12-14 13:45:08,871 INFO L226 Difference]: Without dead ends: 49 [2022-12-14 13:45:08,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:45:08,873 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:08,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 61 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:08,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-14 13:45:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-12-14 13:45:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.25) internal successors, (45), 39 states have internal predecessors, (45), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 13:45:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-12-14 13:45:08,882 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2022-12-14 13:45:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:08,882 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-12-14 13:45:08,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:45:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-12-14 13:45:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 13:45:08,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:08,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:08,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 13:45:08,884 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash 21328462, now seen corresponding path program 1 times [2022-12-14 13:45:08,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:08,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790286565] [2022-12-14 13:45:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:08,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 13:45:08,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:08,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790286565] [2022-12-14 13:45:08,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790286565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:08,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:08,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:08,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137724494] [2022-12-14 13:45:08,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:08,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:08,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:08,986 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:09,024 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-12-14 13:45:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:09,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-12-14 13:45:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:09,026 INFO L225 Difference]: With dead ends: 75 [2022-12-14 13:45:09,026 INFO L226 Difference]: Without dead ends: 70 [2022-12-14 13:45:09,026 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 13:45:09,027 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 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 13:45:09,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:09,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-14 13:45:09,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-12-14 13:45:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 49 states have internal predecessors, (55), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2022-12-14 13:45:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-12-14 13:45:09,037 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2022-12-14 13:45:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:09,037 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-12-14 13:45:09,037 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 13:45:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-12-14 13:45:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 13:45:09,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:09,039 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:09,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 13:45:09,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:09,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:09,039 INFO L85 PathProgramCache]: Analyzing trace with hash 672130067, now seen corresponding path program 1 times [2022-12-14 13:45:09,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:09,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556270886] [2022-12-14 13:45:09,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:45:09,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:09,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556270886] [2022-12-14 13:45:09,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556270886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:09,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328571156] [2022-12-14 13:45:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:09,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:09,120 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:09,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:45:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 13:45:09,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:45:09,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:09,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328571156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:09,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:09,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-12-14 13:45:09,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156787943] [2022-12-14 13:45:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:09,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 13:45:09,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 13:45:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:45:09,253 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:09,347 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-12-14 13:45:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 13:45:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-12-14 13:45:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:09,348 INFO L225 Difference]: With dead ends: 110 [2022-12-14 13:45:09,348 INFO L226 Difference]: Without dead ends: 60 [2022-12-14 13:45:09,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:45:09,349 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:09,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 110 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-12-14 13:45:09,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-12-14 13:45:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 46 states have internal predecessors, (52), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-12-14 13:45:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-12-14 13:45:09,355 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2022-12-14 13:45:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:09,355 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-12-14 13:45:09,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-12-14 13:45:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 13:45:09,356 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:09,356 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:09,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:45:09,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:45:09,558 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1599491552, now seen corresponding path program 1 times [2022-12-14 13:45:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:09,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414711569] [2022-12-14 13:45:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:45:09,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414711569] [2022-12-14 13:45:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414711569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:09,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:09,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:09,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949171356] [2022-12-14 13:45:09,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:09,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:09,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:09,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:09,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:09,726 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:09,757 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-12-14 13:45:09,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:09,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-12-14 13:45:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:09,759 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:45:09,759 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 13:45:09,760 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 13:45:09,760 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:09,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 109 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:09,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 13:45:09,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-12-14 13:45:09,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 10 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (19), 10 states have call predecessors, (19), 9 states have call successors, (19) [2022-12-14 13:45:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-12-14 13:45:09,767 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-12-14 13:45:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:09,767 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-12-14 13:45:09,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-12-14 13:45:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 13:45:09,768 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:09,768 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:09,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 13:45:09,768 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:09,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash -141800136, now seen corresponding path program 1 times [2022-12-14 13:45:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:09,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647731749] [2022-12-14 13:45:09,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 13:45:09,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:09,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647731749] [2022-12-14 13:45:09,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647731749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:09,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:09,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:09,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972461743] [2022-12-14 13:45:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:09,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:09,818 INFO L87 Difference]: Start difference. First operand 68 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:09,847 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-12-14 13:45:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:09,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 13:45:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:09,848 INFO L225 Difference]: With dead ends: 84 [2022-12-14 13:45:09,849 INFO L226 Difference]: Without dead ends: 82 [2022-12-14 13:45:09,849 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 13:45:09,849 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:09,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:09,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-12-14 13:45:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-12-14 13:45:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 61 states have internal predecessors, (66), 11 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2022-12-14 13:45:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-12-14 13:45:09,856 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2022-12-14 13:45:09,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:09,856 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-12-14 13:45:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-12-14 13:45:09,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 13:45:09,857 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:09,857 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:09,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 13:45:09,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:09,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash -88974329, now seen corresponding path program 1 times [2022-12-14 13:45:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:09,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536288497] [2022-12-14 13:45:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:45:09,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536288497] [2022-12-14 13:45:09,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536288497] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:09,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123037244] [2022-12-14 13:45:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:09,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:09,906 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:45:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:09,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:45:09,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:45:10,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:45:10,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123037244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:10,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [329255724] [2022-12-14 13:45:10,135 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 13:45:10,135 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:10,139 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 13:45:10,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:10,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-12-14 13:45:10,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421781752] [2022-12-14 13:45:10,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:45:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:45:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:45:10,142 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 13:45:10,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:10,487 INFO L93 Difference]: Finished difference Result 205 states and 274 transitions. [2022-12-14 13:45:10,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:45:10,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2022-12-14 13:45:10,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:10,488 INFO L225 Difference]: With dead ends: 205 [2022-12-14 13:45:10,489 INFO L226 Difference]: Without dead ends: 136 [2022-12-14 13:45:10,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:45:10,491 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 118 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:10,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 505 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:45:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-12-14 13:45:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2022-12-14 13:45:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.164835164835165) internal successors, (106), 96 states have internal predecessors, (106), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 17 states have call predecessors, (34), 15 states have call successors, (34) [2022-12-14 13:45:10,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-12-14 13:45:10,508 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 29 [2022-12-14 13:45:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:10,508 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-12-14 13:45:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.411764705882353) internal successors, (58), 15 states have internal predecessors, (58), 9 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 13:45:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-12-14 13:45:10,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 13:45:10,509 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:10,510 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:10,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:45:10,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 13:45:10,711 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1080973755, now seen corresponding path program 2 times [2022-12-14 13:45:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:10,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093768616] [2022-12-14 13:45:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:45:10,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093768616] [2022-12-14 13:45:10,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093768616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:10,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012363152] [2022-12-14 13:45:10,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:45:10,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:10,898 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:10,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:45:10,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:45:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:45:10,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:45:10,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:45:10,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:10,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012363152] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:10,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:10,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 13:45:10,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505210305] [2022-12-14 13:45:10,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:10,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:10,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:10,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:10,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:45:10,963 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:10,992 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2022-12-14 13:45:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-12-14 13:45:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:10,994 INFO L225 Difference]: With dead ends: 130 [2022-12-14 13:45:10,994 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 13:45:10,994 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 13:45:10,995 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:10,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:10,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 13:45:11,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-12-14 13:45:11,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.1578947368421053) internal successors, (110), 98 states have internal predecessors, (110), 16 states have call successors, (16), 6 states have call predecessors, (16), 9 states have return successors, (34), 19 states have call predecessors, (34), 15 states have call successors, (34) [2022-12-14 13:45:11,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-12-14 13:45:11,010 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 41 [2022-12-14 13:45:11,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:11,011 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-12-14 13:45:11,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:11,011 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-12-14 13:45:11,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 13:45:11,012 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:11,012 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:11,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:45:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:45:11,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:11,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash -849551892, now seen corresponding path program 1 times [2022-12-14 13:45:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:11,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803099064] [2022-12-14 13:45:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 13:45:11,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:11,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803099064] [2022-12-14 13:45:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803099064] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:11,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700876195] [2022-12-14 13:45:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:11,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:11,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:45:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:45:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:45:11,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:45:11,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700876195] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:11,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [553908907] [2022-12-14 13:45:11,534 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 13:45:11,534 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:11,534 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 13:45:11,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:11,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 18 [2022-12-14 13:45:11,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630570292] [2022-12-14 13:45:11,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:11,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 13:45:11,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:11,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 13:45:11,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-12-14 13:45:11,537 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 13:45:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:11,855 INFO L93 Difference]: Finished difference Result 300 states and 387 transitions. [2022-12-14 13:45:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:45:11,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2022-12-14 13:45:11,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:11,857 INFO L225 Difference]: With dead ends: 300 [2022-12-14 13:45:11,857 INFO L226 Difference]: Without dead ends: 190 [2022-12-14 13:45:11,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:45:11,858 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 131 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:11,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 516 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:45:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-14 13:45:11,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2022-12-14 13:45:11,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 130 states have (on average 1.146153846153846) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 8 states have call predecessors, (22), 11 states have return successors, (48), 27 states have call predecessors, (48), 21 states have call successors, (48) [2022-12-14 13:45:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 219 transitions. [2022-12-14 13:45:11,868 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 219 transitions. Word has length 42 [2022-12-14 13:45:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:11,868 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 219 transitions. [2022-12-14 13:45:11,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 13:45:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 219 transitions. [2022-12-14 13:45:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 13:45:11,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:11,869 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:11,873 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:45:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:12,071 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:12,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1422004225, now seen corresponding path program 1 times [2022-12-14 13:45:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:12,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748190771] [2022-12-14 13:45:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:12,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:45:12,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748190771] [2022-12-14 13:45:12,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748190771] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:12,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771252857] [2022-12-14 13:45:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:12,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:12,142 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:12,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:45:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:12,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:45:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:45:12,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 13:45:12,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771252857] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:12,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2124111118] [2022-12-14 13:45:12,468 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 13:45:12,468 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:12,469 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 13:45:12,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:12,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 15, 15] total 20 [2022-12-14 13:45:12,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173657653] [2022-12-14 13:45:12,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:12,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 13:45:12,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:12,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 13:45:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:45:12,471 INFO L87 Difference]: Start difference. First operand 167 states and 219 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 13:45:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:12,874 INFO L93 Difference]: Finished difference Result 357 states and 467 transitions. [2022-12-14 13:45:12,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 13:45:12,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2022-12-14 13:45:12,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:12,875 INFO L225 Difference]: With dead ends: 357 [2022-12-14 13:45:12,875 INFO L226 Difference]: Without dead ends: 210 [2022-12-14 13:45:12,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:45:12,877 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 141 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 906 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:12,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 664 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 906 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:45:12,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-14 13:45:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2022-12-14 13:45:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 148 states have (on average 1.1418918918918919) internal successors, (169), 148 states have internal predecessors, (169), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (55), 31 states have call predecessors, (55), 24 states have call successors, (55) [2022-12-14 13:45:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 249 transitions. [2022-12-14 13:45:12,886 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 249 transitions. Word has length 47 [2022-12-14 13:45:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:12,887 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 249 transitions. [2022-12-14 13:45:12,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 15 states have internal predecessors, (62), 9 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-14 13:45:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 249 transitions. [2022-12-14 13:45:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 13:45:12,887 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:12,888 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:12,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 13:45:13,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:13,089 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:13,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:13,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1627248947, now seen corresponding path program 2 times [2022-12-14 13:45:13,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:13,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828280218] [2022-12-14 13:45:13,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:45:13,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828280218] [2022-12-14 13:45:13,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828280218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:13,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017216155] [2022-12-14 13:45:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:45:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:13,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:13,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:45:13,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:45:13,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:45:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 13:45:13,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:13,209 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:45:13,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:13,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017216155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:13,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:13,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-12-14 13:45:13,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716065773] [2022-12-14 13:45:13,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:13,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:13,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:13,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-14 13:45:13,211 INFO L87 Difference]: Start difference. First operand 189 states and 249 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:13,240 INFO L93 Difference]: Finished difference Result 203 states and 269 transitions. [2022-12-14 13:45:13,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-12-14 13:45:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:13,243 INFO L225 Difference]: With dead ends: 203 [2022-12-14 13:45:13,243 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 13:45:13,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 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 13:45:13,244 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:13,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:13,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 13:45:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 197. [2022-12-14 13:45:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 156 states have (on average 1.1346153846153846) internal successors, (177), 152 states have internal predecessors, (177), 25 states have call successors, (25), 9 states have call predecessors, (25), 12 states have return successors, (55), 35 states have call predecessors, (55), 24 states have call successors, (55) [2022-12-14 13:45:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 257 transitions. [2022-12-14 13:45:13,254 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 257 transitions. Word has length 47 [2022-12-14 13:45:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:13,254 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 257 transitions. [2022-12-14 13:45:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 257 transitions. [2022-12-14 13:45:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 13:45:13,255 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:13,255 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:13,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 13:45:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:45:13,456 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:13,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:13,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1094890292, now seen corresponding path program 1 times [2022-12-14 13:45:13,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:13,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350140344] [2022-12-14 13:45:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:45:13,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350140344] [2022-12-14 13:45:13,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350140344] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:13,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943081518] [2022-12-14 13:45:13,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:13,503 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:13,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:45:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 13:45:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 13:45:13,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:13,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943081518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:13,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:13,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-12-14 13:45:13,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817923064] [2022-12-14 13:45:13,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:13,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:45:13,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:45:13,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 13:45:13,579 INFO L87 Difference]: Start difference. First operand 197 states and 257 transitions. Second operand has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:13,606 INFO L93 Difference]: Finished difference Result 215 states and 278 transitions. [2022-12-14 13:45:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:45:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-12-14 13:45:13,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:13,607 INFO L225 Difference]: With dead ends: 215 [2022-12-14 13:45:13,607 INFO L226 Difference]: Without dead ends: 214 [2022-12-14 13:45:13,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 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 13:45:13,608 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:13,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-14 13:45:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 193. [2022-12-14 13:45:13,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 153 states have (on average 1.1372549019607843) internal successors, (174), 149 states have internal predecessors, (174), 24 states have call successors, (24), 9 states have call predecessors, (24), 12 states have return successors, (52), 34 states have call predecessors, (52), 23 states have call successors, (52) [2022-12-14 13:45:13,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 250 transitions. [2022-12-14 13:45:13,622 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 250 transitions. Word has length 48 [2022-12-14 13:45:13,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:13,622 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 250 transitions. [2022-12-14 13:45:13,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 13:45:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 250 transitions. [2022-12-14 13:45:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-12-14 13:45:13,623 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:13,623 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:13,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:45:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 13:45:13,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1763632041, now seen corresponding path program 1 times [2022-12-14 13:45:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:13,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676826089] [2022-12-14 13:45:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-12-14 13:45:13,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:13,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676826089] [2022-12-14 13:45:13,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676826089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:13,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:13,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438152802] [2022-12-14 13:45:13,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:13,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:13,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:13,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:13,871 INFO L87 Difference]: Start difference. First operand 193 states and 250 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 13:45:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:13,902 INFO L93 Difference]: Finished difference Result 211 states and 271 transitions. [2022-12-14 13:45:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 64 [2022-12-14 13:45:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:13,904 INFO L225 Difference]: With dead ends: 211 [2022-12-14 13:45:13,904 INFO L226 Difference]: Without dead ends: 210 [2022-12-14 13:45:13,905 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 13:45:13,905 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:13,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 163 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-12-14 13:45:13,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 189. [2022-12-14 13:45:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 150 states have (on average 1.14) internal successors, (171), 146 states have internal predecessors, (171), 23 states have call successors, (23), 9 states have call predecessors, (23), 12 states have return successors, (49), 33 states have call predecessors, (49), 22 states have call successors, (49) [2022-12-14 13:45:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 243 transitions. [2022-12-14 13:45:13,914 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 243 transitions. Word has length 64 [2022-12-14 13:45:13,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:13,914 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 243 transitions. [2022-12-14 13:45:13,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 13:45:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 243 transitions. [2022-12-14 13:45:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 13:45:13,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:13,915 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 13:45:13,915 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:13,916 INFO L85 PathProgramCache]: Analyzing trace with hash -2011250500, now seen corresponding path program 1 times [2022-12-14 13:45:13,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:13,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526912022] [2022-12-14 13:45:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:13,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-12-14 13:45:13,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526912022] [2022-12-14 13:45:13,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526912022] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21246059] [2022-12-14 13:45:13,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:13,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:13,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:13,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:13,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:45:13,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:13,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:45:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:14,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:45:14,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:45:14,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21246059] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:14,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1113583526] [2022-12-14 13:45:14,287 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 13:45:14,287 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:14,287 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 13:45:14,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:14,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 15, 15] total 19 [2022-12-14 13:45:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113603913] [2022-12-14 13:45:14,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:14,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 13:45:14,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 13:45:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2022-12-14 13:45:14,289 INFO L87 Difference]: Start difference. First operand 189 states and 243 transitions. Second operand has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:45:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:14,636 INFO L93 Difference]: Finished difference Result 451 states and 614 transitions. [2022-12-14 13:45:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:45:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2022-12-14 13:45:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:14,639 INFO L225 Difference]: With dead ends: 451 [2022-12-14 13:45:14,639 INFO L226 Difference]: Without dead ends: 282 [2022-12-14 13:45:14,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 113 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:45:14,641 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 191 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:14,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 147 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:45:14,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-12-14 13:45:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 256. [2022-12-14 13:45:14,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 204 states have (on average 1.1323529411764706) internal successors, (231), 198 states have internal predecessors, (231), 32 states have call successors, (32), 12 states have call predecessors, (32), 16 states have return successors, (64), 45 states have call predecessors, (64), 31 states have call successors, (64) [2022-12-14 13:45:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 327 transitions. [2022-12-14 13:45:14,655 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 327 transitions. Word has length 67 [2022-12-14 13:45:14,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:14,655 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 327 transitions. [2022-12-14 13:45:14,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 14 states have internal predecessors, (74), 9 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 13:45:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 327 transitions. [2022-12-14 13:45:14,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 13:45:14,656 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:14,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:14,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:45:14,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 13:45:14,856 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:14,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1416408316, now seen corresponding path program 1 times [2022-12-14 13:45:14,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:14,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872825299] [2022-12-14 13:45:14,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:14,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:14,899 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 13:45:14,899 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:14,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872825299] [2022-12-14 13:45:14,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872825299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:14,899 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:14,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:14,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963524243] [2022-12-14 13:45:14,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:14,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:14,901 INFO L87 Difference]: Start difference. First operand 256 states and 327 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 13:45:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:14,922 INFO L93 Difference]: Finished difference Result 278 states and 352 transitions. [2022-12-14 13:45:14,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:14,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2022-12-14 13:45:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:14,924 INFO L225 Difference]: With dead ends: 278 [2022-12-14 13:45:14,924 INFO L226 Difference]: Without dead ends: 277 [2022-12-14 13:45:14,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:14,925 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:14,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 99 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-12-14 13:45:14,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 264. [2022-12-14 13:45:14,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 211 states have (on average 1.127962085308057) internal successors, (238), 204 states have internal predecessors, (238), 32 states have call successors, (32), 12 states have call predecessors, (32), 17 states have return successors, (65), 47 states have call predecessors, (65), 31 states have call successors, (65) [2022-12-14 13:45:14,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2022-12-14 13:45:14,941 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 61 [2022-12-14 13:45:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:14,942 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2022-12-14 13:45:14,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 13:45:14,942 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2022-12-14 13:45:14,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 13:45:14,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:14,943 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:14,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 13:45:14,943 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1326723027, now seen corresponding path program 1 times [2022-12-14 13:45:14,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:14,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007820849] [2022-12-14 13:45:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:14,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 13:45:15,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007820849] [2022-12-14 13:45:15,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007820849] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:15,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301544612] [2022-12-14 13:45:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:15,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:15,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:15,030 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:15,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:45:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:15,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 13:45:15,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 13:45:15,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 13:45:15,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301544612] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:15,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 13:45:15,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-12-14 13:45:15,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958384578] [2022-12-14 13:45:15,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:15,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 13:45:15,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:15,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 13:45:15,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:45:15,140 INFO L87 Difference]: Start difference. First operand 264 states and 335 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 13:45:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:15,201 INFO L93 Difference]: Finished difference Result 352 states and 458 transitions. [2022-12-14 13:45:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:45:15,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2022-12-14 13:45:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:15,203 INFO L225 Difference]: With dead ends: 352 [2022-12-14 13:45:15,203 INFO L226 Difference]: Without dead ends: 351 [2022-12-14 13:45:15,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:45:15,203 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:15,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 222 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-12-14 13:45:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 294. [2022-12-14 13:45:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 226 states have internal predecessors, (266), 34 states have call successors, (34), 12 states have call predecessors, (34), 21 states have return successors, (83), 55 states have call predecessors, (83), 33 states have call successors, (83) [2022-12-14 13:45:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 383 transitions. [2022-12-14 13:45:15,214 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 383 transitions. Word has length 62 [2022-12-14 13:45:15,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:15,214 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 383 transitions. [2022-12-14 13:45:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 9 states have internal predecessors, (29), 3 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 13:45:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 383 transitions. [2022-12-14 13:45:15,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 13:45:15,215 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:15,215 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:15,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:45:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 13:45:15,416 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1067121362, now seen corresponding path program 1 times [2022-12-14 13:45:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:15,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926072728] [2022-12-14 13:45:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:15,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-12-14 13:45:15,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:15,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926072728] [2022-12-14 13:45:15,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926072728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:15,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573434375] [2022-12-14 13:45:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:15,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:15,457 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:15,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:45:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:15,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:45:15,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:45:15,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 13:45:15,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573434375] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:15,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156153858] [2022-12-14 13:45:15,818 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 13:45:15,819 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:15,819 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 13:45:15,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:15,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 17, 17] total 34 [2022-12-14 13:45:15,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056629713] [2022-12-14 13:45:15,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:15,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:45:15,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:45:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 13:45:15,821 INFO L87 Difference]: Start difference. First operand 294 states and 383 transitions. Second operand has 34 states, 32 states have (on average 3.5) internal successors, (112), 22 states have internal predecessors, (112), 17 states have call successors, (23), 13 states have call predecessors, (23), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 13:45:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:16,473 INFO L93 Difference]: Finished difference Result 563 states and 756 transitions. [2022-12-14 13:45:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:45:16,473 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.5) internal successors, (112), 22 states have internal predecessors, (112), 17 states have call successors, (23), 13 states have call predecessors, (23), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 71 [2022-12-14 13:45:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:16,475 INFO L225 Difference]: With dead ends: 563 [2022-12-14 13:45:16,475 INFO L226 Difference]: Without dead ends: 314 [2022-12-14 13:45:16,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=2319, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 13:45:16,478 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 358 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:16,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 279 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 13:45:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-12-14 13:45:16,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 289. [2022-12-14 13:45:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 228 states have (on average 1.1140350877192982) internal successors, (254), 226 states have internal predecessors, (254), 34 states have call successors, (34), 13 states have call predecessors, (34), 23 states have return successors, (71), 49 states have call predecessors, (71), 33 states have call successors, (71) [2022-12-14 13:45:16,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 359 transitions. [2022-12-14 13:45:16,493 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 359 transitions. Word has length 71 [2022-12-14 13:45:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:16,494 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 359 transitions. [2022-12-14 13:45:16,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.5) internal successors, (112), 22 states have internal predecessors, (112), 17 states have call successors, (23), 13 states have call predecessors, (23), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-12-14 13:45:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 359 transitions. [2022-12-14 13:45:16,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 13:45:16,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:16,495 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:16,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:45:16,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:16,697 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1202171959, now seen corresponding path program 1 times [2022-12-14 13:45:16,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:16,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126855445] [2022-12-14 13:45:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:16,768 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 13:45:16,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:16,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126855445] [2022-12-14 13:45:16,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126855445] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:45:16,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:45:16,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 13:45:16,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519333803] [2022-12-14 13:45:16,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:45:16,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 13:45:16,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:16,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 13:45:16,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:16,770 INFO L87 Difference]: Start difference. First operand 289 states and 359 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 13:45:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:16,797 INFO L93 Difference]: Finished difference Result 300 states and 372 transitions. [2022-12-14 13:45:16,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 13:45:16,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 66 [2022-12-14 13:45:16,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:16,798 INFO L225 Difference]: With dead ends: 300 [2022-12-14 13:45:16,798 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 13:45:16,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 13:45:16,799 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:16,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:45:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 13:45:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2022-12-14 13:45:16,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 231 states have (on average 1.103896103896104) internal successors, (255), 228 states have internal predecessors, (255), 34 states have call successors, (34), 13 states have call predecessors, (34), 23 states have return successors, (71), 50 states have call predecessors, (71), 33 states have call successors, (71) [2022-12-14 13:45:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 360 transitions. [2022-12-14 13:45:16,808 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 360 transitions. Word has length 66 [2022-12-14 13:45:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:16,809 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 360 transitions. [2022-12-14 13:45:16,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 13:45:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 360 transitions. [2022-12-14 13:45:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-12-14 13:45:16,809 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:16,809 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:16,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 13:45:16,810 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1373876497, now seen corresponding path program 1 times [2022-12-14 13:45:16,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:16,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853662075] [2022-12-14 13:45:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:16,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 26 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 13:45:16,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853662075] [2022-12-14 13:45:16,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853662075] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:16,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317405505] [2022-12-14 13:45:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:16,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:16,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:16,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:16,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:45:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:16,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:45:16,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 13:45:17,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-12-14 13:45:17,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317405505] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:17,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [902276500] [2022-12-14 13:45:17,233 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 13:45:17,233 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:17,234 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 13:45:17,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:17,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 7] total 27 [2022-12-14 13:45:17,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698307997] [2022-12-14 13:45:17,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:17,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 13:45:17,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:17,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 13:45:17,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=633, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:45:17,236 INFO L87 Difference]: Start difference. First operand 292 states and 360 transitions. Second operand has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 13:45:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:18,217 INFO L93 Difference]: Finished difference Result 607 states and 746 transitions. [2022-12-14 13:45:18,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 13:45:18,217 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 79 [2022-12-14 13:45:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:18,220 INFO L225 Difference]: With dead ends: 607 [2022-12-14 13:45:18,220 INFO L226 Difference]: Without dead ends: 377 [2022-12-14 13:45:18,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 152 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 13:45:18,224 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 198 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 1375 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:18,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 144 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:45:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-12-14 13:45:18,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 286. [2022-12-14 13:45:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 225 states have (on average 1.0933333333333333) internal successors, (246), 225 states have internal predecessors, (246), 34 states have call successors, (34), 13 states have call predecessors, (34), 23 states have return successors, (69), 47 states have call predecessors, (69), 33 states have call successors, (69) [2022-12-14 13:45:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 349 transitions. [2022-12-14 13:45:18,235 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 349 transitions. Word has length 79 [2022-12-14 13:45:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:18,235 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 349 transitions. [2022-12-14 13:45:18,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 23 states have internal predecessors, (88), 11 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-12-14 13:45:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 349 transitions. [2022-12-14 13:45:18,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-12-14 13:45:18,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:18,236 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:18,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:45:18,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 13:45:18,437 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:18,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:18,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2072541113, now seen corresponding path program 1 times [2022-12-14 13:45:18,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:18,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866826725] [2022-12-14 13:45:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:45:18,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:18,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866826725] [2022-12-14 13:45:18,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866826725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:18,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532124489] [2022-12-14 13:45:18,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:18,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:18,553 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:18,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:45:18,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:18,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:45:18,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 13:45:18,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 13:45:18,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532124489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386568956] [2022-12-14 13:45:18,810 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:18,810 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:18,810 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 13:45:18,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:18,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2022-12-14 13:45:18,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284130567] [2022-12-14 13:45:18,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:18,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:45:18,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:45:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-14 13:45:18,812 INFO L87 Difference]: Start difference. First operand 286 states and 349 transitions. Second operand has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 13:45:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:19,020 INFO L93 Difference]: Finished difference Result 526 states and 638 transitions. [2022-12-14 13:45:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 13:45:19,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 75 [2022-12-14 13:45:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:19,023 INFO L225 Difference]: With dead ends: 526 [2022-12-14 13:45:19,023 INFO L226 Difference]: Without dead ends: 294 [2022-12-14 13:45:19,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 144 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-12-14 13:45:19,025 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 116 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:19,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 244 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-14 13:45:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 284. [2022-12-14 13:45:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 224 states have (on average 1.0892857142857142) internal successors, (244), 223 states have internal predecessors, (244), 34 states have call successors, (34), 13 states have call predecessors, (34), 22 states have return successors, (64), 47 states have call predecessors, (64), 33 states have call successors, (64) [2022-12-14 13:45:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 342 transitions. [2022-12-14 13:45:19,035 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 342 transitions. Word has length 75 [2022-12-14 13:45:19,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:19,035 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 342 transitions. [2022-12-14 13:45:19,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.857142857142857) internal successors, (68), 12 states have internal predecessors, (68), 8 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-12-14 13:45:19,035 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 342 transitions. [2022-12-14 13:45:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-12-14 13:45:19,036 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:19,036 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:19,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:45:19,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:19,236 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:19,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:19,237 INFO L85 PathProgramCache]: Analyzing trace with hash 690665040, now seen corresponding path program 1 times [2022-12-14 13:45:19,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:19,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251286797] [2022-12-14 13:45:19,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:19,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:19,338 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:45:19,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:19,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251286797] [2022-12-14 13:45:19,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251286797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:19,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716088866] [2022-12-14 13:45:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:19,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:19,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:19,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:19,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:45:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:45:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:45:19,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:19,503 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 13:45:19,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716088866] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:19,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1515084015] [2022-12-14 13:45:19,505 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:19,505 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:19,505 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 13:45:19,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:19,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-12-14 13:45:19,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875660339] [2022-12-14 13:45:19,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:19,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 13:45:19,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 13:45:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:45:19,507 INFO L87 Difference]: Start difference. First operand 284 states and 342 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 13:45:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:19,647 INFO L93 Difference]: Finished difference Result 500 states and 600 transitions. [2022-12-14 13:45:19,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 13:45:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-12-14 13:45:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:19,650 INFO L225 Difference]: With dead ends: 500 [2022-12-14 13:45:19,650 INFO L226 Difference]: Without dead ends: 288 [2022-12-14 13:45:19,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 13:45:19,652 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:19,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 332 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:19,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-12-14 13:45:19,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2022-12-14 13:45:19,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 222 states have (on average 1.09009009009009) internal successors, (242), 222 states have internal predecessors, (242), 34 states have call successors, (34), 13 states have call predecessors, (34), 22 states have return successors, (63), 46 states have call predecessors, (63), 33 states have call successors, (63) [2022-12-14 13:45:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 339 transitions. [2022-12-14 13:45:19,662 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 339 transitions. Word has length 76 [2022-12-14 13:45:19,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:19,662 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 339 transitions. [2022-12-14 13:45:19,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 9 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 13:45:19,662 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 339 transitions. [2022-12-14 13:45:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-12-14 13:45:19,663 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:19,663 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:19,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:45:19,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 13:45:19,865 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:19,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1054712744, now seen corresponding path program 1 times [2022-12-14 13:45:19,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:19,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449474196] [2022-12-14 13:45:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:19,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:20,133 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 13:45:20,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449474196] [2022-12-14 13:45:20,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449474196] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:20,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709202126] [2022-12-14 13:45:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:20,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:20,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:20,135 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:20,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 13:45:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:20,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 13:45:20,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-12-14 13:45:20,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 13:45:20,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709202126] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1242156777] [2022-12-14 13:45:20,566 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:20,566 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:20,566 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 13:45:20,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:20,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 11] total 32 [2022-12-14 13:45:20,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497037418] [2022-12-14 13:45:20,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:20,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 13:45:20,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:20,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 13:45:20,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-12-14 13:45:20,569 INFO L87 Difference]: Start difference. First operand 282 states and 339 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 13:45:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:22,007 INFO L93 Difference]: Finished difference Result 647 states and 808 transitions. [2022-12-14 13:45:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 13:45:22,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 80 [2022-12-14 13:45:22,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:22,011 INFO L225 Difference]: With dead ends: 647 [2022-12-14 13:45:22,011 INFO L226 Difference]: Without dead ends: 404 [2022-12-14 13:45:22,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 155 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=802, Invalid=5360, Unknown=0, NotChecked=0, Total=6162 [2022-12-14 13:45:22,013 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 271 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 2119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:22,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 188 Invalid, 2119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 13:45:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-12-14 13:45:22,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 318. [2022-12-14 13:45:22,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 249 states have (on average 1.0803212851405624) internal successors, (269), 250 states have internal predecessors, (269), 38 states have call successors, (38), 13 states have call predecessors, (38), 27 states have return successors, (82), 54 states have call predecessors, (82), 37 states have call successors, (82) [2022-12-14 13:45:22,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 389 transitions. [2022-12-14 13:45:22,026 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 389 transitions. Word has length 80 [2022-12-14 13:45:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:22,027 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 389 transitions. [2022-12-14 13:45:22,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 28 states have internal predecessors, (106), 14 states have call successors, (17), 5 states have call predecessors, (17), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-12-14 13:45:22,027 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 389 transitions. [2022-12-14 13:45:22,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-12-14 13:45:22,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:22,028 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:22,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 13:45:22,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:22,229 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1316138812, now seen corresponding path program 1 times [2022-12-14 13:45:22,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:22,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838561502] [2022-12-14 13:45:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 32 proven. 3 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-12-14 13:45:22,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838561502] [2022-12-14 13:45:22,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838561502] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372044152] [2022-12-14 13:45:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:22,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:22,307 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:22,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 13:45:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 13:45:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:45:22,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:22,628 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 33 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 13:45:22,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372044152] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:22,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [472106303] [2022-12-14 13:45:22,629 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:22,630 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:22,630 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 13:45:22,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:22,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 17 [2022-12-14 13:45:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096071577] [2022-12-14 13:45:22,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:22,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 13:45:22,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 13:45:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-14 13:45:22,631 INFO L87 Difference]: Start difference. First operand 318 states and 389 transitions. Second operand has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 13:45:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:22,809 INFO L93 Difference]: Finished difference Result 570 states and 714 transitions. [2022-12-14 13:45:22,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 13:45:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 93 [2022-12-14 13:45:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:22,811 INFO L225 Difference]: With dead ends: 570 [2022-12-14 13:45:22,811 INFO L226 Difference]: Without dead ends: 303 [2022-12-14 13:45:22,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:45:22,813 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 139 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:22,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 243 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:22,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-14 13:45:22,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 298. [2022-12-14 13:45:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 232 states have (on average 1.0646551724137931) internal successors, (247), 236 states have internal predecessors, (247), 36 states have call successors, (36), 13 states have call predecessors, (36), 26 states have return successors, (71), 48 states have call predecessors, (71), 35 states have call successors, (71) [2022-12-14 13:45:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 354 transitions. [2022-12-14 13:45:22,832 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 354 transitions. Word has length 93 [2022-12-14 13:45:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:22,832 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 354 transitions. [2022-12-14 13:45:22,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.1875) internal successors, (83), 14 states have internal predecessors, (83), 10 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-12-14 13:45:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 354 transitions. [2022-12-14 13:45:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-12-14 13:45:22,834 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:22,834 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:22,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 13:45:23,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:23,034 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:23,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:23,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1064602655, now seen corresponding path program 2 times [2022-12-14 13:45:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:23,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157216746] [2022-12-14 13:45:23,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:23,240 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 13:45:23,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157216746] [2022-12-14 13:45:23,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157216746] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:23,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092774435] [2022-12-14 13:45:23,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:45:23,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:23,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:23,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:23,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 13:45:23,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:45:23,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:45:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:45:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 13:45:23,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-12-14 13:45:23,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092774435] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:23,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948375344] [2022-12-14 13:45:23,506 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:23,507 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:23,507 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 13:45:23,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:23,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-12-14 13:45:23,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036434805] [2022-12-14 13:45:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-14 13:45:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-14 13:45:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-12-14 13:45:23,510 INFO L87 Difference]: Start difference. First operand 298 states and 354 transitions. Second operand has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 13:45:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:23,831 INFO L93 Difference]: Finished difference Result 409 states and 491 transitions. [2022-12-14 13:45:23,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 13:45:23,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) Word has length 94 [2022-12-14 13:45:23,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:23,834 INFO L225 Difference]: With dead ends: 409 [2022-12-14 13:45:23,834 INFO L226 Difference]: Without dead ends: 406 [2022-12-14 13:45:23,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:45:23,835 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 47 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:23,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 582 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:45:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-12-14 13:45:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 349. [2022-12-14 13:45:23,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 273 states have (on average 1.0622710622710623) internal successors, (290), 275 states have internal predecessors, (290), 39 states have call successors, (39), 13 states have call predecessors, (39), 33 states have return successors, (92), 60 states have call predecessors, (92), 38 states have call successors, (92) [2022-12-14 13:45:23,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 421 transitions. [2022-12-14 13:45:23,847 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 421 transitions. Word has length 94 [2022-12-14 13:45:23,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:23,847 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 421 transitions. [2022-12-14 13:45:23,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 24 states have internal predecessors, (81), 7 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 13:45:23,848 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 421 transitions. [2022-12-14 13:45:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-12-14 13:45:23,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:23,848 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:23,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 13:45:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 13:45:24,049 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1357056160, now seen corresponding path program 1 times [2022-12-14 13:45:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857820335] [2022-12-14 13:45:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:24,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:24,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 13:45:24,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857820335] [2022-12-14 13:45:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857820335] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507272614] [2022-12-14 13:45:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:24,249 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:24,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 13:45:24,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 13:45:24,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-12-14 13:45:24,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-12-14 13:45:24,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507272614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:24,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913407997] [2022-12-14 13:45:24,727 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:24,727 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:24,727 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 13:45:24,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:24,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-12-14 13:45:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566489064] [2022-12-14 13:45:24,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:24,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 13:45:24,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:24,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 13:45:24,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 13:45:24,730 INFO L87 Difference]: Start difference. First operand 349 states and 421 transitions. Second operand has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-12-14 13:45:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:24,984 INFO L93 Difference]: Finished difference Result 416 states and 504 transitions. [2022-12-14 13:45:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-14 13:45:24,984 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) Word has length 95 [2022-12-14 13:45:24,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:24,986 INFO L225 Difference]: With dead ends: 416 [2022-12-14 13:45:24,986 INFO L226 Difference]: Without dead ends: 414 [2022-12-14 13:45:24,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 167 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=1862, Unknown=0, NotChecked=0, Total=2162 [2022-12-14 13:45:24,987 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:24,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 504 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:24,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-12-14 13:45:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 357. [2022-12-14 13:45:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 280 states have (on average 1.0464285714285715) internal successors, (293), 281 states have internal predecessors, (293), 39 states have call successors, (39), 13 states have call predecessors, (39), 34 states have return successors, (94), 62 states have call predecessors, (94), 38 states have call successors, (94) [2022-12-14 13:45:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 426 transitions. [2022-12-14 13:45:25,008 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 426 transitions. Word has length 95 [2022-12-14 13:45:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:25,008 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 426 transitions. [2022-12-14 13:45:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.787878787878788) internal successors, (92), 34 states have internal predecessors, (92), 9 states have call successors, (11), 1 states have call predecessors, (11), 12 states have return successors, (20), 20 states have call predecessors, (20), 9 states have call successors, (20) [2022-12-14 13:45:25,008 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 426 transitions. [2022-12-14 13:45:25,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-12-14 13:45:25,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:25,010 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 7, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 13:45:25,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 13:45:25,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 13:45:25,211 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -773554345, now seen corresponding path program 1 times [2022-12-14 13:45:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:25,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860466688] [2022-12-14 13:45:25,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:25,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 82 proven. 141 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2022-12-14 13:45:25,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:25,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860466688] [2022-12-14 13:45:25,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860466688] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:25,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221167344] [2022-12-14 13:45:25,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:25,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:25,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:25,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:25,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 13:45:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 13:45:25,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-12-14 13:45:25,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 88 proven. 70 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2022-12-14 13:45:25,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221167344] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:25,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825489414] [2022-12-14 13:45:25,773 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:25,773 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:25,774 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 13:45:25,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:25,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 26 [2022-12-14 13:45:25,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636478377] [2022-12-14 13:45:25,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:25,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 13:45:25,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:25,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 13:45:25,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2022-12-14 13:45:25,775 INFO L87 Difference]: Start difference. First operand 357 states and 426 transitions. Second operand has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 13:45:26,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:26,213 INFO L93 Difference]: Finished difference Result 563 states and 679 transitions. [2022-12-14 13:45:26,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 13:45:26,214 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) Word has length 164 [2022-12-14 13:45:26,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:26,215 INFO L225 Difference]: With dead ends: 563 [2022-12-14 13:45:26,215 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 13:45:26,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 313 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 13:45:26,218 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 229 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:26,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 358 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:45:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 13:45:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 219. [2022-12-14 13:45:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 172 states have (on average 1.0406976744186047) internal successors, (179), 175 states have internal predecessors, (179), 27 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (34), 30 states have call predecessors, (34), 26 states have call successors, (34) [2022-12-14 13:45:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 240 transitions. [2022-12-14 13:45:26,226 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 240 transitions. Word has length 164 [2022-12-14 13:45:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:26,226 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 240 transitions. [2022-12-14 13:45:26,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 4.958333333333333) internal successors, (119), 22 states have internal predecessors, (119), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2022-12-14 13:45:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 240 transitions. [2022-12-14 13:45:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-12-14 13:45:26,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:26,227 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 13:45:26,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 13:45:26,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:26,427 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:26,428 INFO L85 PathProgramCache]: Analyzing trace with hash -619402072, now seen corresponding path program 1 times [2022-12-14 13:45:26,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:26,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48606434] [2022-12-14 13:45:26,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:26,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 85 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-12-14 13:45:26,714 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48606434] [2022-12-14 13:45:26,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48606434] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:26,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315512926] [2022-12-14 13:45:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:26,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:26,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:26,715 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:26,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 13:45:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:26,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:45:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 59 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-12-14 13:45:26,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 74 proven. 54 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-12-14 13:45:27,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315512926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1755442087] [2022-12-14 13:45:27,764 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:27,764 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:27,764 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 13:45:27,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:27,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2022-12-14 13:45:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155861196] [2022-12-14 13:45:27,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:45:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:27,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:45:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 13:45:27,767 INFO L87 Difference]: Start difference. First operand 219 states and 240 transitions. Second operand has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-12-14 13:45:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:27,891 INFO L93 Difference]: Finished difference Result 231 states and 251 transitions. [2022-12-14 13:45:27,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 13:45:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) Word has length 148 [2022-12-14 13:45:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:27,892 INFO L225 Difference]: With dead ends: 231 [2022-12-14 13:45:27,892 INFO L226 Difference]: Without dead ends: 221 [2022-12-14 13:45:27,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 267 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1411 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=307, Invalid=2045, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 13:45:27,893 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:27,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 440 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-12-14 13:45:27,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2022-12-14 13:45:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 169 states have (on average 1.029585798816568) internal successors, (174), 172 states have internal predecessors, (174), 27 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (33), 29 states have call predecessors, (33), 26 states have call successors, (33) [2022-12-14 13:45:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 234 transitions. [2022-12-14 13:45:27,900 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 234 transitions. Word has length 148 [2022-12-14 13:45:27,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:27,901 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 234 transitions. [2022-12-14 13:45:27,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.7045454545454546) internal successors, (119), 45 states have internal predecessors, (119), 11 states have call successors, (13), 1 states have call predecessors, (13), 15 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2022-12-14 13:45:27,901 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 234 transitions. [2022-12-14 13:45:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-12-14 13:45:27,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:27,902 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1] [2022-12-14 13:45:27,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 13:45:28,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 13:45:28,103 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:28,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:28,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1233598099, now seen corresponding path program 2 times [2022-12-14 13:45:28,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:28,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313645939] [2022-12-14 13:45:28,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:28,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 129 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-12-14 13:45:28,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:28,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313645939] [2022-12-14 13:45:28,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313645939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418133717] [2022-12-14 13:45:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:45:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:28,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:28,195 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:28,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 13:45:28,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 13:45:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:45:28,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 13:45:28,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 129 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-12-14 13:45:28,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 129 proven. 48 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-12-14 13:45:28,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418133717] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:28,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1698060895] [2022-12-14 13:45:28,441 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:28,441 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:28,442 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 13:45:28,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:28,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-12-14 13:45:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150218009] [2022-12-14 13:45:28,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:28,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 13:45:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 13:45:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-12-14 13:45:28,444 INFO L87 Difference]: Start difference. First operand 215 states and 234 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 13:45:28,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:28,552 INFO L93 Difference]: Finished difference Result 230 states and 249 transitions. [2022-12-14 13:45:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 13:45:28,552 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 202 [2022-12-14 13:45:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:28,553 INFO L225 Difference]: With dead ends: 230 [2022-12-14 13:45:28,553 INFO L226 Difference]: Without dead ends: 219 [2022-12-14 13:45:28,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 398 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-14 13:45:28,554 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 43 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:28,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 122 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-12-14 13:45:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 215. [2022-12-14 13:45:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 172 states have internal predecessors, (173), 27 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (33), 29 states have call predecessors, (33), 26 states have call successors, (33) [2022-12-14 13:45:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 233 transitions. [2022-12-14 13:45:28,565 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 233 transitions. Word has length 202 [2022-12-14 13:45:28,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:28,565 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 233 transitions. [2022-12-14 13:45:28,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 10 states have internal predecessors, (67), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 13:45:28,565 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 233 transitions. [2022-12-14 13:45:28,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-12-14 13:45:28,567 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:28,567 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 10, 10, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 1, 1, 1] [2022-12-14 13:45:28,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 13:45:28,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:28,768 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:28,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1527891261, now seen corresponding path program 3 times [2022-12-14 13:45:28,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252843586] [2022-12-14 13:45:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:28,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 187 proven. 83 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2022-12-14 13:45:28,884 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252843586] [2022-12-14 13:45:28,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252843586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:28,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957703786] [2022-12-14 13:45:28,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:45:28,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:28,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:28,885 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:28,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 13:45:28,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:45:28,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:45:28,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 13:45:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 170 proven. 306 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-12-14 13:45:29,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 170 proven. 320 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-12-14 13:45:29,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957703786] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:29,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1470669340] [2022-12-14 13:45:29,767 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:29,767 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:29,768 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 13:45:29,768 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:29,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 19] total 25 [2022-12-14 13:45:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299536152] [2022-12-14 13:45:29,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:29,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 13:45:29,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 13:45:29,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-12-14 13:45:29,770 INFO L87 Difference]: Start difference. First operand 215 states and 233 transitions. Second operand has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-12-14 13:45:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:30,112 INFO L93 Difference]: Finished difference Result 386 states and 431 transitions. [2022-12-14 13:45:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:45:30,113 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) Word has length 221 [2022-12-14 13:45:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:30,114 INFO L225 Difference]: With dead ends: 386 [2022-12-14 13:45:30,114 INFO L226 Difference]: Without dead ends: 187 [2022-12-14 13:45:30,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 420 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 13:45:30,115 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 302 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:30,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 236 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 13:45:30,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-12-14 13:45:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-12-14 13:45:30,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-12-14 13:45:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2022-12-14 13:45:30,121 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 221 [2022-12-14 13:45:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:30,121 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2022-12-14 13:45:30,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 19 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (25), 9 states have call predecessors, (25), 18 states have call successors, (25) [2022-12-14 13:45:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2022-12-14 13:45:30,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-12-14 13:45:30,122 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:45:30,122 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 2, 1, 1, 1] [2022-12-14 13:45:30,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 13:45:30,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:30,323 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-12-14 13:45:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:45:30,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1983227339, now seen corresponding path program 4 times [2022-12-14 13:45:30,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:45:30,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389467044] [2022-12-14 13:45:30,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:45:30,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:45:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 149 proven. 248 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2022-12-14 13:45:30,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:45:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389467044] [2022-12-14 13:45:30,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389467044] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:45:30,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170167952] [2022-12-14 13:45:30,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:45:30,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:45:30,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:45:30,981 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:45:30,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 13:45:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:45:31,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 13:45:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:45:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 148 proven. 181 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2022-12-14 13:45:31,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:45:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 942 backedges. 218 proven. 160 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-12-14 13:45:33,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170167952] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:45:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446324853] [2022-12-14 13:45:33,144 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 13:45:33,144 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:45:33,145 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 13:45:33,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:45:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 29] total 56 [2022-12-14 13:45:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869775205] [2022-12-14 13:45:33,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:45:33,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-12-14 13:45:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:45:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-12-14 13:45:33,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 13:45:33,147 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2022-12-14 13:45:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:45:33,301 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2022-12-14 13:45:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 13:45:33,301 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) Word has length 240 [2022-12-14 13:45:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:45:33,302 INFO L225 Difference]: With dead ends: 184 [2022-12-14 13:45:33,302 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 13:45:33,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 445 SyntacticMatches, 27 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2884 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=2992, Unknown=0, NotChecked=0, Total=3422 [2022-12-14 13:45:33,304 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:45:33,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 598 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:45:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 13:45:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 13:45:33,305 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 13:45:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 13:45:33,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 240 [2022-12-14 13:45:33,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:45:33,305 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 13:45:33,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 57 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 18 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2022-12-14 13:45:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 13:45:33,305 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 13:45:33,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2022-12-14 13:45:33,307 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2022-12-14 13:45:33,308 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2022-12-14 13:45:33,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 13:45:33,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 13:45:33,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 13:45:35,714 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-14 13:45:35,715 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-14 13:45:35,715 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 6 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 6)) [2022-12-14 13:45:35,715 INFO L902 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: true [2022-12-14 13:45:35,715 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,715 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,715 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,715 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,716 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (or (not (<= |fibo2_#in~n| 5)) (not (<= 5 |fibo2_#in~n|)) (and (<= 5 fibo2_~n) (<= fibo2_~n 5))) (or (<= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 3))) (not (<= |fibo2_#in~n| 1)) (or (not (< |fibo2_#in~n| 5)) (and (<= |fibo2_#in~n| fibo2_~n) (< fibo2_~n 5)))) [2022-12-14 13:45:35,716 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,716 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,716 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,716 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (let ((.cse0 (<= 1 |fibo2_#t~ret6|))) (and (not (<= |fibo2_#in~n| 1)) (or (and (= |fibo2_#t~ret6| 1) (<= fibo2_~n |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 3))) (or (not (<= |fibo2_#in~n| 5)) (and (<= |fibo2_#t~ret6| 3) (<= 5 fibo2_~n) .cse0 (<= fibo2_~n 5)) (not (<= 5 |fibo2_#in~n|))) (or (and (<= |fibo2_#in~n| fibo2_~n) (<= |fibo2_#t~ret6| 2) .cse0 (< fibo2_~n 5)) (not (< |fibo2_#in~n| 5))))) [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 27) the Hoare annotation is: true [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-12-14 13:45:35,717 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,718 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (<= fibo1_~n |fibo1_#in~n|))) (and (or (< 1 fibo1_~n) (not (<= |fibo1_#in~n| 2))) (or (and .cse0 (<= 6 fibo1_~n)) (not (<= 6 |fibo1_#in~n|)) (not (<= |fibo1_#in~n| 6))) (or (not (<= |fibo1_#in~n| 4)) (and .cse0 (<= |fibo1_#in~n| fibo1_~n))))) [2022-12-14 13:45:35,718 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,719 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,719 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,719 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-12-14 13:45:35,719 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,719 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 17) the Hoare annotation is: true [2022-12-14 13:45:35,719 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse1 (<= |fibo1_#in~n| fibo1_~n)) (.cse0 (<= fibo1_~n |fibo1_#in~n|))) (and (or (not (<= |fibo1_#in~n| 4)) (and .cse0 .cse1 (<= 2 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 2)) (not (<= 4 |fibo1_#in~n|))) (or (and .cse0 (= |fibo1_#t~ret4| 1) (<= 2 fibo1_~n) .cse1) (not (< |fibo1_#in~n| 4))) (or (and .cse0 (<= |fibo1_#t~ret4| 5) (<= 0 (+ |fibo1_#t~ret4| 2147483648)) (<= 6 fibo1_~n)) (not (<= 6 |fibo1_#in~n|)) (not (<= |fibo1_#in~n| 6))))) [2022-12-14 13:45:35,719 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-12-14 13:45:35,720 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-12-14 13:45:35,723 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:45:35,725 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 13:45:35,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:45:35 BoogieIcfgContainer [2022-12-14 13:45:35,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 13:45:35,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 13:45:35,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 13:45:35,731 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 13:45:35,731 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:45:08" (3/4) ... [2022-12-14 13:45:35,733 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-14 13:45:35,737 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-12-14 13:45:35,738 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-12-14 13:45:35,740 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-12-14 13:45:35,741 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-12-14 13:45:35,741 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-12-14 13:45:35,741 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-14 13:45:35,763 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 13:45:35,763 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 13:45:35,763 INFO L158 Benchmark]: Toolchain (without parser) took 28189.70ms. Allocated memory was 127.9MB in the beginning and 297.8MB in the end (delta: 169.9MB). Free memory was 77.3MB in the beginning and 226.7MB in the end (delta: -149.4MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,763 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 127.9MB. Free memory is still 103.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:45:35,764 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.19ms. Allocated memory is still 127.9MB. Free memory was 77.1MB in the beginning and 67.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,764 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.93ms. Allocated memory is still 127.9MB. Free memory was 66.9MB in the beginning and 65.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,764 INFO L158 Benchmark]: Boogie Preprocessor took 16.62ms. Allocated memory is still 127.9MB. Free memory was 65.6MB in the beginning and 64.7MB in the end (delta: 862.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 13:45:35,764 INFO L158 Benchmark]: RCFGBuilder took 287.06ms. Allocated memory was 127.9MB in the beginning and 169.9MB in the end (delta: 41.9MB). Free memory was 64.6MB in the beginning and 139.6MB in the end (delta: -75.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,765 INFO L158 Benchmark]: TraceAbstraction took 27638.75ms. Allocated memory was 169.9MB in the beginning and 297.8MB in the end (delta: 127.9MB). Free memory was 140.4MB in the beginning and 229.9MB in the end (delta: -89.5MB). Peak memory consumption was 153.7MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,765 INFO L158 Benchmark]: Witness Printer took 32.19ms. Allocated memory is still 297.8MB. Free memory was 229.9MB in the beginning and 226.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 13:45:35,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 127.9MB. Free memory is still 103.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.19ms. Allocated memory is still 127.9MB. Free memory was 77.1MB in the beginning and 67.2MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.93ms. Allocated memory is still 127.9MB. Free memory was 66.9MB in the beginning and 65.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.62ms. Allocated memory is still 127.9MB. Free memory was 65.6MB in the beginning and 64.7MB in the end (delta: 862.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 287.06ms. Allocated memory was 127.9MB in the beginning and 169.9MB in the end (delta: 41.9MB). Free memory was 64.6MB in the beginning and 139.6MB in the end (delta: -75.1MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * TraceAbstraction took 27638.75ms. Allocated memory was 169.9MB in the beginning and 297.8MB in the end (delta: 127.9MB). Free memory was 140.4MB in the beginning and 229.9MB in the end (delta: -89.5MB). Peak memory consumption was 153.7MB. Max. memory is 16.1GB. * Witness Printer took 32.19ms. Allocated memory is still 297.8MB. Free memory was 229.9MB in the beginning and 226.7MB 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: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 12 error locations. Started 1 CEGAR loops. OverallTime: 27.6s, OverallIterations: 32, TraceHistogramMax: 13, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 7.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2687 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2616 mSDsluCounter, 7879 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6711 mSDsCounter, 1003 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12272 IncrementalHoareTripleChecker+Invalid, 13275 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1003 mSolverCounterUnsat, 1168 mSDtfsCounter, 12272 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4415 GetRequests, 3591 SyntacticMatches, 138 SemanticMatches, 686 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9414 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=357occurred in iteration=27, InterpolantAutomatonStates: 486, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 32 MinimizatonAttempts, 635 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 890 PreInvPairs, 1328 NumberOfFragments, 210 HoareAnnotationTreeSize, 890 FomulaSimplifications, 26240 FormulaSimplificationTreeSizeReduction, 1.7s HoareSimplificationTime, 8 FomulaSimplificationsInter, 12968 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 4391 NumberOfCodeBlocks, 4076 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 6143 ConstructedInterpolants, 0 QuantifiedInterpolants, 12428 SizeOfPredicates, 59 NumberOfNonLiveVariables, 3756 ConjunctsInSsa, 286 ConjunctsInUnsatCore, 71 InterpolantComputations, 15 PerfectInterpolantSequences, 9894/12660 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold - InvariantResult [Line: 39]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-14 13:45:35,779 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_115bcd50-1f3e-44bb-b0e9-3eb2b4b97ae2/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