./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 23:32:47,038 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 23:32:47,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 23:32:47,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 23:32:47,071 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 23:32:47,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 23:32:47,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 23:32:47,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 23:32:47,084 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 23:32:47,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 23:32:47,092 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 23:32:47,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 23:32:47,094 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 23:32:47,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 23:32:47,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 23:32:47,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 23:32:47,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 23:32:47,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 23:32:47,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 23:32:47,116 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 23:32:47,118 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 23:32:47,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 23:32:47,121 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 23:32:47,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 23:32:47,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 23:32:47,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 23:32:47,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 23:32:47,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 23:32:47,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 23:32:47,138 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 23:32:47,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 23:32:47,139 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 23:32:47,141 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 23:32:47,142 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 23:32:47,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 23:32:47,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 23:32:47,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 23:32:47,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 23:32:47,146 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 23:32:47,147 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 23:32:47,148 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 23:32:47,149 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-11-25 23:32:47,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 23:32:47,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 23:32:47,187 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 23:32:47,187 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 23:32:47,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 23:32:47,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 23:32:47,189 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-25 23:32:47,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-25 23:32:47,189 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-25 23:32:47,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-25 23:32:47,189 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-25 23:32:47,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-25 23:32:47,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-25 23:32:47,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-25 23:32:47,190 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-25 23:32:47,201 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-25 23:32:47,201 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-25 23:32:47,202 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-25 23:32:47,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 23:32:47,203 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 23:32:47,203 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 23:32:47,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 23:32:47,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 23:32:47,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 23:32:47,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 23:32:47,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 23:32:47,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 23:32:47,205 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-25 23:32:47,206 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 23:32:47,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 23:32:47,206 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 23:32:47,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 23:32:47,207 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 23:32:47,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 23:32:47,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:47,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 23:32:47,209 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-25 23:32:47,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 23:32:47,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 23:32:47,209 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-25 23:32:47,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 23:32:47,210 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 23:32:47,210 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-25 23:32:47,210 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_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 [2022-11-25 23:32:47,504 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 23:32:47,537 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 23:32:47,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 23:32:47,541 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 23:32:47,542 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 23:32:47,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2022-11-25 23:32:50,552 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 23:32:50,750 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 23:32:50,751 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2022-11-25 23:32:50,757 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/data/04c898403/a59f4b7426604c23929520911c85df46/FLAG6bd0a5236 [2022-11-25 23:32:50,770 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/data/04c898403/a59f4b7426604c23929520911c85df46 [2022-11-25 23:32:50,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 23:32:50,773 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 23:32:50,775 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:50,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 23:32:50,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 23:32:50,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:50,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4055c223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50, skipping insertion in model container [2022-11-25 23:32:50,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:50,789 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 23:32:50,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 23:32:50,943 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_6bc72b5c-e510-415b-ab30-c76247b0980a/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-11-25 23:32:50,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:50,954 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 23:32:50,970 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2022-11-25 23:32:50,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 23:32:50,985 INFO L208 MainTranslator]: Completed translation [2022-11-25 23:32:50,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50 WrapperNode [2022-11-25 23:32:50,985 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 23:32:50,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:50,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 23:32:50,987 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 23:32:50,994 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,021 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2022-11-25 23:32:51,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 23:32:51,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 23:32:51,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 23:32:51,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 23:32:51,031 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 23:32:51,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 23:32:51,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 23:32:51,041 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 23:32:51,042 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (1/1) ... [2022-11-25 23:32:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 23:32:51,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:51,080 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 23:32:51,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 23:32:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 23:32:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 23:32:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2022-11-25 23:32:51,147 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2022-11-25 23:32:51,147 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2022-11-25 23:32:51,148 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2022-11-25 23:32:51,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 23:32:51,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 23:32:51,209 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 23:32:51,212 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 23:32:51,375 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 23:32:51,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 23:32:51,403 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 23:32:51,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:51 BoogieIcfgContainer [2022-11-25 23:32:51,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 23:32:51,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 23:32:51,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 23:32:51,412 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 23:32:51,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 11:32:50" (1/3) ... [2022-11-25 23:32:51,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce20aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:51, skipping insertion in model container [2022-11-25 23:32:51,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 11:32:50" (2/3) ... [2022-11-25 23:32:51,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fce20aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 11:32:51, skipping insertion in model container [2022-11-25 23:32:51,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:51" (3/3) ... [2022-11-25 23:32:51,415 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2022-11-25 23:32:51,451 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 23:32:51,451 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-25 23:32:51,514 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 23:32:51,521 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;@39709ae4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 23:32:51,521 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 23:32:51,525 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) [2022-11-25 23:32:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-25 23:32:51,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:51,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 23:32:51,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1023451622, now seen corresponding path program 1 times [2022-11-25 23:32:51,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985573210] [2022-11-25 23:32:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:51,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:51,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:51,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985573210] [2022-11-25 23:32:51,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985573210] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:51,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:51,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:51,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305447404] [2022-11-25 23:32:51,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:51,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:51,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:51,774 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) [2022-11-25 23:32:51,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:51,832 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-11-25 23:32:51,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-25 23:32:51,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:51,843 INFO L225 Difference]: With dead ends: 48 [2022-11-25 23:32:51,843 INFO L226 Difference]: Without dead ends: 44 [2022-11-25 23:32:51,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:51,850 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 [2022-11-25 23:32:51,851 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] [2022-11-25 23:32:51,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-25 23:32:51,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-25 23:32:51,886 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) [2022-11-25 23:32:51,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-25 23:32:51,890 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2022-11-25 23:32:51,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:51,890 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-25 23:32:51,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-25 23:32:51,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-25 23:32:51,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:51,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:51,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 23:32:51,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:51,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1662229125, now seen corresponding path program 1 times [2022-11-25 23:32:51,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:51,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66159334] [2022-11-25 23:32:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:51,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:51,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:51,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:51,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66159334] [2022-11-25 23:32:51,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66159334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:51,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:51,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 23:32:51,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69232845] [2022-11-25 23:32:51,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:51,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:51,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:51,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:51,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:51,973 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) [2022-11-25 23:32:52,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:52,089 INFO L93 Difference]: Finished difference Result 63 states and 73 transitions. [2022-11-25 23:32:52,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:52,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-25 23:32:52,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:52,091 INFO L225 Difference]: With dead ends: 63 [2022-11-25 23:32:52,091 INFO L226 Difference]: Without dead ends: 59 [2022-11-25 23:32:52,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 23:32:52,094 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 29 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:52,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:52,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-25 23:32:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-11-25 23:32:52,103 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) [2022-11-25 23:32:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-11-25 23:32:52,106 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-11-25 23:32:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:52,106 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-11-25 23:32:52,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:32:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-11-25 23:32:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 23:32:52,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:52,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:52,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 23:32:52,108 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:52,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:52,109 INFO L85 PathProgramCache]: Analyzing trace with hash -942893292, now seen corresponding path program 1 times [2022-11-25 23:32:52,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:52,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163472516] [2022-11-25 23:32:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:52,164 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163472516] [2022-11-25 23:32:52,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163472516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:52,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:52,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 23:32:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051198164] [2022-11-25 23:32:52,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:52,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 23:32:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:52,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 23:32:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:52,167 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) [2022-11-25 23:32:52,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:52,196 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2022-11-25 23:32:52,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 23:32:52,197 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 [2022-11-25 23:32:52,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:52,198 INFO L225 Difference]: With dead ends: 57 [2022-11-25 23:32:52,198 INFO L226 Difference]: Without dead ends: 55 [2022-11-25 23:32:52,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 23:32:52,201 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 [2022-11-25 23:32:52,201 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] [2022-11-25 23:32:52,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-25 23:32:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2022-11-25 23:32:52,210 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) [2022-11-25 23:32:52,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-25 23:32:52,213 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 12 [2022-11-25 23:32:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:52,213 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-25 23:32:52,213 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) [2022-11-25 23:32:52,214 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-25 23:32:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-25 23:32:52,214 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:52,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:52,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 23:32:52,215 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash 835079079, now seen corresponding path program 1 times [2022-11-25 23:32:52,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:52,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188076717] [2022-11-25 23:32:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:52,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:52,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188076717] [2022-11-25 23:32:52,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188076717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:52,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:52,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 23:32:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797260375] [2022-11-25 23:32:52,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:52,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:32:52,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:52,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:32:52,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-25 23:32:52,323 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) [2022-11-25 23:32:52,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:52,466 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-25 23:32:52,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:32:52,467 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 [2022-11-25 23:32:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:52,468 INFO L225 Difference]: With dead ends: 53 [2022-11-25 23:32:52,469 INFO L226 Difference]: Without dead ends: 49 [2022-11-25 23:32:52,469 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 [2022-11-25 23:32:52,474 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 [2022-11-25 23:32:52,475 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] [2022-11-25 23:32:52,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-25 23:32:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-25 23:32:52,483 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) [2022-11-25 23:32:52,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-11-25 23:32:52,485 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 13 [2022-11-25 23:32:52,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:52,485 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-11-25 23:32:52,485 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) [2022-11-25 23:32:52,486 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-11-25 23:32:52,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-25 23:32:52,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:52,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:52,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 23:32:52,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:52,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 21328462, now seen corresponding path program 1 times [2022-11-25 23:32:52,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:52,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833608852] [2022-11-25 23:32:52,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 23:32:52,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:52,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833608852] [2022-11-25 23:32:52,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833608852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:52,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:52,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926840742] [2022-11-25 23:32:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:52,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:52,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:52,646 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) [2022-11-25 23:32:52,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:52,747 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2022-11-25 23:32:52,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:52,748 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 [2022-11-25 23:32:52,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:52,750 INFO L225 Difference]: With dead ends: 75 [2022-11-25 23:32:52,750 INFO L226 Difference]: Without dead ends: 70 [2022-11-25 23:32:52,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:52,752 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:52,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:32:52,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-25 23:32:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2022-11-25 23:32:52,771 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) [2022-11-25 23:32:52,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2022-11-25 23:32:52,773 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 22 [2022-11-25 23:32:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:52,773 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2022-11-25 23:32:52,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 23:32:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2022-11-25 23:32:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-25 23:32:52,775 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:52,775 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] [2022-11-25 23:32:52,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 23:32:52,776 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:52,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:52,777 INFO L85 PathProgramCache]: Analyzing trace with hash 672130067, now seen corresponding path program 1 times [2022-11-25 23:32:52,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:52,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191335221] [2022-11-25 23:32:52,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 23:32:52,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191335221] [2022-11-25 23:32:52,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191335221] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:52,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921619061] [2022-11-25 23:32:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:52,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:52,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:52,963 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:52,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 23:32:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:53,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 23:32:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:53,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:53,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921619061] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:53,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:53,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2022-11-25 23:32:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669571923] [2022-11-25 23:32:53,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 23:32:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 23:32:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-25 23:32:53,127 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) [2022-11-25 23:32:53,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:53,247 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-11-25 23:32:53,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 23:32:53,248 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 [2022-11-25 23:32:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:53,249 INFO L225 Difference]: With dead ends: 110 [2022-11-25 23:32:53,249 INFO L226 Difference]: Without dead ends: 60 [2022-11-25 23:32:53,250 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 [2022-11-25 23:32:53,252 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 [2022-11-25 23:32:53,252 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] [2022-11-25 23:32:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-25 23:32:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-25 23:32:53,260 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) [2022-11-25 23:32:53,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2022-11-25 23:32:53,262 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 23 [2022-11-25 23:32:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:53,263 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2022-11-25 23:32:53,263 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) [2022-11-25 23:32:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2022-11-25 23:32:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-25 23:32:53,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:53,265 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] [2022-11-25 23:32:53,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:53,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:53,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1599491552, now seen corresponding path program 1 times [2022-11-25 23:32:53,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:53,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229217653] [2022-11-25 23:32:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:53,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:32:53,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:53,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229217653] [2022-11-25 23:32:53,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229217653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:53,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:53,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167805489] [2022-11-25 23:32:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:53,563 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) [2022-11-25 23:32:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:53,611 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-25 23:32:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:53,611 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 [2022-11-25 23:32:53,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:53,615 INFO L225 Difference]: With dead ends: 84 [2022-11-25 23:32:53,615 INFO L226 Difference]: Without dead ends: 79 [2022-11-25 23:32:53,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:53,622 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 [2022-11-25 23:32:53,623 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] [2022-11-25 23:32:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-25 23:32:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-11-25 23:32:53,640 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) [2022-11-25 23:32:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 88 transitions. [2022-11-25 23:32:53,642 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 88 transitions. Word has length 24 [2022-11-25 23:32:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:53,642 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 88 transitions. [2022-11-25 23:32:53,642 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) [2022-11-25 23:32:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 88 transitions. [2022-11-25 23:32:53,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 23:32:53,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:53,656 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] [2022-11-25 23:32:53,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 23:32:53,657 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash -141800136, now seen corresponding path program 1 times [2022-11-25 23:32:53,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:53,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834194144] [2022-11-25 23:32:53,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:53,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 23:32:53,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834194144] [2022-11-25 23:32:53,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834194144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:53,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:32:53,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:32:53,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178662913] [2022-11-25 23:32:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:53,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:53,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:53,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:53,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:53,827 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) [2022-11-25 23:32:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:53,875 INFO L93 Difference]: Finished difference Result 84 states and 107 transitions. [2022-11-25 23:32:53,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:53,876 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 [2022-11-25 23:32:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:53,878 INFO L225 Difference]: With dead ends: 84 [2022-11-25 23:32:53,878 INFO L226 Difference]: Without dead ends: 82 [2022-11-25 23:32:53,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:32:53,883 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 [2022-11-25 23:32:53,886 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] [2022-11-25 23:32:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-25 23:32:53,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-25 23:32:53,902 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) [2022-11-25 23:32:53,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-25 23:32:53,910 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 28 [2022-11-25 23:32:53,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:53,912 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-25 23:32:53,912 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) [2022-11-25 23:32:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-25 23:32:53,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 23:32:53,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:53,915 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] [2022-11-25 23:32:53,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 23:32:53,915 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash -88974329, now seen corresponding path program 1 times [2022-11-25 23:32:53,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:53,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831614414] [2022-11-25 23:32:53,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:53,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:32:54,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831614414] [2022-11-25 23:32:54,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831614414] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868411711] [2022-11-25 23:32:54,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:54,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:54,039 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:54,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 23:32:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:54,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:32:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:54,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:32:54,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868411711] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:54,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358845092] [2022-11-25 23:32:54,429 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:32:54,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:54,434 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:32:54,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:32:54,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2022-11-25 23:32:54,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632771547] [2022-11-25 23:32:54,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:54,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:32:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:54,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:32:54,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:32:54,445 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) [2022-11-25 23:32:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:55,055 INFO L93 Difference]: Finished difference Result 205 states and 274 transitions. [2022-11-25 23:32:55,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 23:32:55,056 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 [2022-11-25 23:32:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:55,057 INFO L225 Difference]: With dead ends: 205 [2022-11-25 23:32:55,057 INFO L226 Difference]: Without dead ends: 136 [2022-11-25 23:32:55,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:32:55,059 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 118 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:55,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 505 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 719 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:32:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-25 23:32:55,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2022-11-25 23:32:55,084 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) [2022-11-25 23:32:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2022-11-25 23:32:55,085 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 29 [2022-11-25 23:32:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:55,086 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2022-11-25 23:32:55,086 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) [2022-11-25 23:32:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2022-11-25 23:32:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-25 23:32:55,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:55,087 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] [2022-11-25 23:32:55,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:55,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:55,288 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1080973755, now seen corresponding path program 2 times [2022-11-25 23:32:55,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:55,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716504211] [2022-11-25 23:32:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:55,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:32:55,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:55,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716504211] [2022-11-25 23:32:55,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716504211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:55,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072628886] [2022-11-25 23:32:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:32:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:55,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:55,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 23:32:55,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:32:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:32:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:32:55,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:32:55,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:55,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072628886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:55,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:55,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 23:32:55,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315747734] [2022-11-25 23:32:55,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:55,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:55,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:55,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:55,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:32:55,529 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) [2022-11-25 23:32:55,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:55,561 INFO L93 Difference]: Finished difference Result 130 states and 168 transitions. [2022-11-25 23:32:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:55,561 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 [2022-11-25 23:32:55,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:55,563 INFO L225 Difference]: With dead ends: 130 [2022-11-25 23:32:55,563 INFO L226 Difference]: Without dead ends: 129 [2022-11-25 23:32:55,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:32:55,564 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 [2022-11-25 23:32:55,564 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] [2022-11-25 23:32:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-25 23:32:55,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-11-25 23:32:55,576 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) [2022-11-25 23:32:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 160 transitions. [2022-11-25 23:32:55,578 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 160 transitions. Word has length 41 [2022-11-25 23:32:55,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:55,578 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 160 transitions. [2022-11-25 23:32:55,578 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) [2022-11-25 23:32:55,578 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 160 transitions. [2022-11-25 23:32:55,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-25 23:32:55,579 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:55,579 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] [2022-11-25 23:32:55,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:55,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:55,785 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:55,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:55,786 INFO L85 PathProgramCache]: Analyzing trace with hash -849551892, now seen corresponding path program 1 times [2022-11-25 23:32:55,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:55,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786528216] [2022-11-25 23:32:55,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:55,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:55,870 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 23:32:55,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:55,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786528216] [2022-11-25 23:32:55,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786528216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:55,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191213586] [2022-11-25 23:32:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:55,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:55,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:55,873 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:55,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 23:32:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:55,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:32:55,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:56,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:32:56,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191213586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:56,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424944459] [2022-11-25 23:32:56,333 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-25 23:32:56,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:56,334 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:32:56,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:32:56,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 13, 13] total 23 [2022-11-25 23:32:56,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133968217] [2022-11-25 23:32:56,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:56,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:32:56,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:56,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:32:56,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:32:56,338 INFO L87 Difference]: Start difference. First operand 124 states and 160 transitions. Second operand has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:32:57,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:57,011 INFO L93 Difference]: Finished difference Result 322 states and 422 transitions. [2022-11-25 23:32:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:32:57,012 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2022-11-25 23:32:57,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:57,015 INFO L225 Difference]: With dead ends: 322 [2022-11-25 23:32:57,016 INFO L226 Difference]: Without dead ends: 212 [2022-11-25 23:32:57,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:32:57,018 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 181 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 713 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:57,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 713 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:32:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-25 23:32:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2022-11-25 23:32:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 148 states have (on average 1.1554054054054055) internal successors, (171), 150 states have internal predecessors, (171), 25 states have call successors, (25), 10 states have call predecessors, (25), 13 states have return successors, (48), 29 states have call predecessors, (48), 24 states have call successors, (48) [2022-11-25 23:32:57,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2022-11-25 23:32:57,051 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 42 [2022-11-25 23:32:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:57,053 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2022-11-25 23:32:57,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.380952380952381) internal successors, (71), 17 states have internal predecessors, (71), 11 states have call successors, (15), 8 states have call predecessors, (15), 5 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 23:32:57,054 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2022-11-25 23:32:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 23:32:57,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:57,055 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:57,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 23:32:57,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:57,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1587514251, now seen corresponding path program 1 times [2022-11-25 23:32:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:57,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063962432] [2022-11-25 23:32:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:57,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:57,343 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-25 23:32:57,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063962432] [2022-11-25 23:32:57,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063962432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:57,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223646783] [2022-11-25 23:32:57,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:57,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:57,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:57,346 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:57,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 23:32:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:32:57,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 23:32:57,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:32:57,990 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 23:32:57,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223646783] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:32:57,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982289587] [2022-11-25 23:32:57,992 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-25 23:32:57,993 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:32:57,993 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:32:57,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:32:57,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 19, 19] total 24 [2022-11-25 23:32:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128660381] [2022-11-25 23:32:57,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:32:57,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:32:57,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:57,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:32:57,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:32:57,995 INFO L87 Difference]: Start difference. First operand 190 states and 244 transitions. Second operand has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 23:32:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:58,776 INFO L93 Difference]: Finished difference Result 407 states and 524 transitions. [2022-11-25 23:32:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 23:32:58,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 59 [2022-11-25 23:32:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:58,778 INFO L225 Difference]: With dead ends: 407 [2022-11-25 23:32:58,778 INFO L226 Difference]: Without dead ends: 237 [2022-11-25 23:32:58,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 91 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:32:58,780 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 206 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:58,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 804 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:32:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-25 23:32:58,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 212. [2022-11-25 23:32:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 166 states have (on average 1.1506024096385543) internal successors, (191), 167 states have internal predecessors, (191), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (54), 33 states have call predecessors, (54), 27 states have call successors, (54) [2022-11-25 23:32:58,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-11-25 23:32:58,798 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 59 [2022-11-25 23:32:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:58,798 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-11-25 23:32:58,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.130434782608696) internal successors, (72), 17 states have internal predecessors, (72), 11 states have call successors, (14), 9 states have call predecessors, (14), 5 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-25 23:32:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-11-25 23:32:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-25 23:32:58,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:58,800 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:58,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:59,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 23:32:59,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:59,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:59,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1792758973, now seen corresponding path program 2 times [2022-11-25 23:32:59,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:59,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223242055] [2022-11-25 23:32:59,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:59,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-25 23:32:59,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:59,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223242055] [2022-11-25 23:32:59,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223242055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:59,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391647997] [2022-11-25 23:32:59,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:32:59,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:59,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:59,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:59,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 23:32:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:32:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:32:59,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 23:32:59,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-25 23:32:59,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:59,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391647997] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:59,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:59,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-11-25 23:32:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077815640] [2022-11-25 23:32:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:32:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:32:59,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:32:59,185 INFO L87 Difference]: Start difference. First operand 212 states and 273 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) [2022-11-25 23:32:59,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:59,225 INFO L93 Difference]: Finished difference Result 226 states and 293 transitions. [2022-11-25 23:32:59,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:32:59,226 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 59 [2022-11-25 23:32:59,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:59,231 INFO L225 Difference]: With dead ends: 226 [2022-11-25 23:32:59,231 INFO L226 Difference]: Without dead ends: 225 [2022-11-25 23:32:59,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 23:32:59,233 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 [2022-11-25 23:32:59,234 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] [2022-11-25 23:32:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-25 23:32:59,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 220. [2022-11-25 23:32:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 174 states have (on average 1.1436781609195403) internal successors, (199), 171 states have internal predecessors, (199), 28 states have call successors, (28), 11 states have call predecessors, (28), 14 states have return successors, (54), 37 states have call predecessors, (54), 27 states have call successors, (54) [2022-11-25 23:32:59,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 281 transitions. [2022-11-25 23:32:59,251 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 281 transitions. Word has length 59 [2022-11-25 23:32:59,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:59,252 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 281 transitions. [2022-11-25 23:32:59,252 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) [2022-11-25 23:32:59,252 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 281 transitions. [2022-11-25 23:32:59,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 23:32:59,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:59,254 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:59,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:59,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:59,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:59,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:59,461 INFO L85 PathProgramCache]: Analyzing trace with hash 259046782, now seen corresponding path program 1 times [2022-11-25 23:32:59,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:59,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923831359] [2022-11-25 23:32:59,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:59,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-25 23:32:59,546 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:32:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923831359] [2022-11-25 23:32:59,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923831359] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:32:59,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437977163] [2022-11-25 23:32:59,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:59,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:32:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:32:59,548 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:32:59,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 23:32:59,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:32:59,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 23:32:59,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:32:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-25 23:32:59,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:32:59,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437977163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:32:59,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:32:59,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-25 23:32:59,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396935122] [2022-11-25 23:32:59,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:32:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 23:32:59,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:32:59,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 23:32:59,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:32:59,669 INFO L87 Difference]: Start difference. First operand 220 states and 281 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) [2022-11-25 23:32:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:32:59,722 INFO L93 Difference]: Finished difference Result 238 states and 302 transitions. [2022-11-25 23:32:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 23:32:59,723 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 60 [2022-11-25 23:32:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:32:59,724 INFO L225 Difference]: With dead ends: 238 [2022-11-25 23:32:59,725 INFO L226 Difference]: Without dead ends: 237 [2022-11-25 23:32:59,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 23:32:59,726 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:32:59,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 138 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:32:59,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-25 23:32:59,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 216. [2022-11-25 23:32:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 171 states have (on average 1.1461988304093567) internal successors, (196), 168 states have internal predecessors, (196), 27 states have call successors, (27), 11 states have call predecessors, (27), 14 states have return successors, (51), 36 states have call predecessors, (51), 26 states have call successors, (51) [2022-11-25 23:32:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 274 transitions. [2022-11-25 23:32:59,758 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 274 transitions. Word has length 60 [2022-11-25 23:32:59,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:32:59,759 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 274 transitions. [2022-11-25 23:32:59,759 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) [2022-11-25 23:32:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 274 transitions. [2022-11-25 23:32:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-25 23:32:59,760 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:32:59,760 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:32:59,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 23:32:59,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 23:32:59,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:32:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:32:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1139210959, now seen corresponding path program 1 times [2022-11-25 23:32:59,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:32:59,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963253307] [2022-11-25 23:32:59,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:32:59,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:32:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:00,040 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-11-25 23:33:00,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:00,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963253307] [2022-11-25 23:33:00,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963253307] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:00,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:00,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:00,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933315211] [2022-11-25 23:33:00,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:00,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:33:00,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:00,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:33:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:00,043 INFO L87 Difference]: Start difference. First operand 216 states and 274 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-25 23:33:00,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:00,085 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2022-11-25 23:33:00,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:33:00,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 67 [2022-11-25 23:33:00,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:00,087 INFO L225 Difference]: With dead ends: 228 [2022-11-25 23:33:00,088 INFO L226 Difference]: Without dead ends: 227 [2022-11-25 23:33:00,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:00,089 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 [2022-11-25 23:33:00,089 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] [2022-11-25 23:33:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-25 23:33:00,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 210. [2022-11-25 23:33:00,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 167 states have (on average 1.1497005988023952) internal successors, (192), 163 states have internal predecessors, (192), 26 states have call successors, (26), 11 states have call predecessors, (26), 13 states have return successors, (43), 35 states have call predecessors, (43), 25 states have call successors, (43) [2022-11-25 23:33:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 261 transitions. [2022-11-25 23:33:00,102 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 261 transitions. Word has length 67 [2022-11-25 23:33:00,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:00,103 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 261 transitions. [2022-11-25 23:33:00,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-25 23:33:00,103 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 261 transitions. [2022-11-25 23:33:00,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 23:33:00,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:00,104 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 23:33:00,105 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -657014903, now seen corresponding path program 1 times [2022-11-25 23:33:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:00,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919920105] [2022-11-25 23:33:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-11-25 23:33:00,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919920105] [2022-11-25 23:33:00,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919920105] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:00,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385306467] [2022-11-25 23:33:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:00,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:00,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:00,204 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:00,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 23:33:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:00,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 23:33:00,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 58 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:33:00,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 58 proven. 43 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 23:33:00,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385306467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:00,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711710854] [2022-11-25 23:33:00,878 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 23:33:00,878 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:00,879 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:00,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:00,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 19, 19] total 23 [2022-11-25 23:33:00,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320381581] [2022-11-25 23:33:00,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:00,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 23:33:00,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:00,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 23:33:00,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:33:00,882 INFO L87 Difference]: Start difference. First operand 210 states and 261 transitions. Second operand has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:33:01,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:01,675 INFO L93 Difference]: Finished difference Result 584 states and 774 transitions. [2022-11-25 23:33:01,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 23:33:01,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 78 [2022-11-25 23:33:01,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:01,678 INFO L225 Difference]: With dead ends: 584 [2022-11-25 23:33:01,678 INFO L226 Difference]: Without dead ends: 394 [2022-11-25 23:33:01,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 131 SyntacticMatches, 16 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1494, Unknown=0, NotChecked=0, Total=1806 [2022-11-25 23:33:01,681 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 367 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:01,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 165 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:33:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-25 23:33:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 361. [2022-11-25 23:33:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 289 states have (on average 1.1418685121107266) internal successors, (330), 280 states have internal predecessors, (330), 45 states have call successors, (45), 18 states have call predecessors, (45), 23 states have return successors, (77), 62 states have call predecessors, (77), 44 states have call successors, (77) [2022-11-25 23:33:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 452 transitions. [2022-11-25 23:33:01,712 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 452 transitions. Word has length 78 [2022-11-25 23:33:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:01,712 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 452 transitions. [2022-11-25 23:33:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 16 states have internal predecessors, (83), 11 states have call successors, (16), 8 states have call predecessors, (16), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-25 23:33:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 452 transitions. [2022-11-25 23:33:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 23:33:01,719 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:01,719 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 1] [2022-11-25 23:33:01,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:01,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 23:33:01,925 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:01,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:01,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1962617586, now seen corresponding path program 1 times [2022-11-25 23:33:01,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:01,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165717178] [2022-11-25 23:33:01,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:01,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-11-25 23:33:01,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:01,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165717178] [2022-11-25 23:33:01,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165717178] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:01,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:01,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:01,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509617172] [2022-11-25 23:33:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:01,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:33:01,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:33:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:01,995 INFO L87 Difference]: Start difference. First operand 361 states and 452 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) [2022-11-25 23:33:02,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:02,033 INFO L93 Difference]: Finished difference Result 389 states and 491 transitions. [2022-11-25 23:33:02,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:33:02,034 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 73 [2022-11-25 23:33:02,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:02,036 INFO L225 Difference]: With dead ends: 389 [2022-11-25 23:33:02,036 INFO L226 Difference]: Without dead ends: 388 [2022-11-25 23:33:02,037 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 [2022-11-25 23:33:02,037 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 [2022-11-25 23:33:02,038 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] [2022-11-25 23:33:02,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-25 23:33:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 374. [2022-11-25 23:33:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 300 states have (on average 1.1366666666666667) internal successors, (341), 290 states have internal predecessors, (341), 45 states have call successors, (45), 18 states have call predecessors, (45), 25 states have return successors, (86), 65 states have call predecessors, (86), 44 states have call successors, (86) [2022-11-25 23:33:02,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 472 transitions. [2022-11-25 23:33:02,059 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 472 transitions. Word has length 73 [2022-11-25 23:33:02,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:02,059 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 472 transitions. [2022-11-25 23:33:02,059 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) [2022-11-25 23:33:02,059 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 472 transitions. [2022-11-25 23:33:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-25 23:33:02,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:02,061 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 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, 1] [2022-11-25 23:33:02,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 23:33:02,061 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:02,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1079341213, now seen corresponding path program 1 times [2022-11-25 23:33:02,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226558222] [2022-11-25 23:33:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:02,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:02,228 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-11-25 23:33:02,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:02,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226558222] [2022-11-25 23:33:02,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226558222] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:02,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58672345] [2022-11-25 23:33:02,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:02,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:02,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:02,230 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:02,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 23:33:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:02,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 23:33:02,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:02,402 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-11-25 23:33:02,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:02,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58672345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:02,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:02,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2022-11-25 23:33:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50897888] [2022-11-25 23:33:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:02,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 23:33:02,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:02,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 23:33:02,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:33:02,404 INFO L87 Difference]: Start difference. First operand 374 states and 472 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) [2022-11-25 23:33:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:02,494 INFO L93 Difference]: Finished difference Result 485 states and 630 transitions. [2022-11-25 23:33:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 23:33:02,495 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 74 [2022-11-25 23:33:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:02,498 INFO L225 Difference]: With dead ends: 485 [2022-11-25 23:33:02,498 INFO L226 Difference]: Without dead ends: 484 [2022-11-25 23:33:02,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-25 23:33:02,499 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:02,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 192 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:33:02,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-11-25 23:33:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 410. [2022-11-25 23:33:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 329 states have (on average 1.1398176291793314) internal successors, (375), 316 states have internal predecessors, (375), 48 states have call successors, (48), 18 states have call predecessors, (48), 29 states have return successors, (111), 75 states have call predecessors, (111), 47 states have call successors, (111) [2022-11-25 23:33:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 534 transitions. [2022-11-25 23:33:02,525 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 534 transitions. Word has length 74 [2022-11-25 23:33:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:02,526 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 534 transitions. [2022-11-25 23:33:02,526 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) [2022-11-25 23:33:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 534 transitions. [2022-11-25 23:33:02,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-25 23:33:02,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:02,528 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:33:02,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:02,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 23:33:02,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1812662554, now seen corresponding path program 1 times [2022-11-25 23:33:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:02,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458387918] [2022-11-25 23:33:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2022-11-25 23:33:02,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458387918] [2022-11-25 23:33:02,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458387918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44523534] [2022-11-25 23:33:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:02,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:02,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:02,822 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:02,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 23:33:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:02,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 23:33:02,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:33:03,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:03,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44523534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:03,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:03,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [4] total 24 [2022-11-25 23:33:03,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255628122] [2022-11-25 23:33:03,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:03,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:33:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:03,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:33:03,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:33:03,176 INFO L87 Difference]: Start difference. First operand 410 states and 534 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:33:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:03,783 INFO L93 Difference]: Finished difference Result 793 states and 1068 transitions. [2022-11-25 23:33:03,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:33:03,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 95 [2022-11-25 23:33:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:03,787 INFO L225 Difference]: With dead ends: 793 [2022-11-25 23:33:03,787 INFO L226 Difference]: Without dead ends: 442 [2022-11-25 23:33:03,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:33:03,790 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 328 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:03,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 219 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:33:03,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-25 23:33:03,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 433. [2022-11-25 23:33:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.138728323699422) internal successors, (394), 335 states have internal predecessors, (394), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (113), 77 states have call predecessors, (113), 49 states have call successors, (113) [2022-11-25 23:33:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 557 transitions. [2022-11-25 23:33:03,815 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 557 transitions. Word has length 95 [2022-11-25 23:33:03,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:03,815 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 557 transitions. [2022-11-25 23:33:03,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 11 states have internal predecessors, (68), 10 states have call successors, (13), 10 states have call predecessors, (13), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 23:33:03,815 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 557 transitions. [2022-11-25 23:33:03,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-25 23:33:03,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:03,816 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:03,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 23:33:04,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:04,023 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:04,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:04,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1307042925, now seen corresponding path program 1 times [2022-11-25 23:33:04,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:04,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355634458] [2022-11-25 23:33:04,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:04,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-11-25 23:33:04,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:04,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355634458] [2022-11-25 23:33:04,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355634458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:04,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 23:33:04,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 23:33:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730124900] [2022-11-25 23:33:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:04,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 23:33:04,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 23:33:04,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 23:33:04,115 INFO L87 Difference]: Start difference. First operand 433 states and 557 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) [2022-11-25 23:33:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:04,158 INFO L93 Difference]: Finished difference Result 447 states and 573 transitions. [2022-11-25 23:33:04,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 23:33:04,159 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 78 [2022-11-25 23:33:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:04,162 INFO L225 Difference]: With dead ends: 447 [2022-11-25 23:33:04,163 INFO L226 Difference]: Without dead ends: 446 [2022-11-25 23:33:04,163 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 [2022-11-25 23:33:04,164 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:04,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 135 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 23:33:04,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-25 23:33:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 433. [2022-11-25 23:33:04,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.1329479768786128) internal successors, (392), 335 states have internal predecessors, (392), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (113), 77 states have call predecessors, (113), 49 states have call successors, (113) [2022-11-25 23:33:04,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 555 transitions. [2022-11-25 23:33:04,194 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 555 transitions. Word has length 78 [2022-11-25 23:33:04,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:04,194 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 555 transitions. [2022-11-25 23:33:04,195 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) [2022-11-25 23:33:04,195 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 555 transitions. [2022-11-25 23:33:04,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 23:33:04,196 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:04,196 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:04,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-25 23:33:04,197 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:04,197 INFO L85 PathProgramCache]: Analyzing trace with hash 122703663, now seen corresponding path program 1 times [2022-11-25 23:33:04,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:04,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359599063] [2022-11-25 23:33:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:04,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:33:04,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359599063] [2022-11-25 23:33:04,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359599063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:04,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954026805] [2022-11-25 23:33:04,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:04,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:04,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:04,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:04,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 23:33:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:04,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:33:04,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 34 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-25 23:33:04,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 83 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-25 23:33:05,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954026805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:05,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [892304191] [2022-11-25 23:33:05,018 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:05,018 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:05,019 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:05,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:05,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2022-11-25 23:33:05,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146826239] [2022-11-25 23:33:05,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:05,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:33:05,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:05,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:33:05,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:33:05,021 INFO L87 Difference]: Start difference. First operand 433 states and 555 transitions. Second operand has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:33:05,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:05,509 INFO L93 Difference]: Finished difference Result 839 states and 1085 transitions. [2022-11-25 23:33:05,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:33:05,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 87 [2022-11-25 23:33:05,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:05,512 INFO L225 Difference]: With dead ends: 839 [2022-11-25 23:33:05,513 INFO L226 Difference]: Without dead ends: 473 [2022-11-25 23:33:05,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 166 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2022-11-25 23:33:05,517 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 177 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:05,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 510 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:05,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-11-25 23:33:05,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 433. [2022-11-25 23:33:05,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 346 states have (on average 1.1329479768786128) internal successors, (392), 335 states have internal predecessors, (392), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (107), 77 states have call predecessors, (107), 49 states have call successors, (107) [2022-11-25 23:33:05,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 549 transitions. [2022-11-25 23:33:05,543 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 549 transitions. Word has length 87 [2022-11-25 23:33:05,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:05,544 INFO L495 AbstractCegarLoop]: Abstraction has 433 states and 549 transitions. [2022-11-25 23:33:05,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.333333333333333) internal successors, (78), 14 states have internal predecessors, (78), 10 states have call successors, (14), 7 states have call predecessors, (14), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:33:05,544 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 549 transitions. [2022-11-25 23:33:05,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-25 23:33:05,547 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:05,547 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:05,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:05,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 23:33:05,753 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:05,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash 375246234, now seen corresponding path program 1 times [2022-11-25 23:33:05,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:05,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41331880] [2022-11-25 23:33:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:33:06,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41331880] [2022-11-25 23:33:06,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41331880] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:06,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938886166] [2022-11-25 23:33:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:06,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:06,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:06,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 23:33:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:33:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:33:06,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 18 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 23:33:06,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938886166] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:06,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [915425878] [2022-11-25 23:33:06,394 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:06,394 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:06,395 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:06,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:06,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2022-11-25 23:33:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231620056] [2022-11-25 23:33:06,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:06,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 23:33:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:06,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 23:33:06,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-25 23:33:06,398 INFO L87 Difference]: Start difference. First operand 433 states and 549 transitions. Second operand has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:33:06,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:06,794 INFO L93 Difference]: Finished difference Result 782 states and 991 transitions. [2022-11-25 23:33:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:33:06,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 88 [2022-11-25 23:33:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:06,801 INFO L225 Difference]: With dead ends: 782 [2022-11-25 23:33:06,801 INFO L226 Difference]: Without dead ends: 437 [2022-11-25 23:33:06,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 168 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:33:06,804 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 134 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:06,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 538 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:06,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-11-25 23:33:06,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 427. [2022-11-25 23:33:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 340 states have (on average 1.1352941176470588) internal successors, (386), 332 states have internal predecessors, (386), 50 states have call successors, (50), 20 states have call predecessors, (50), 33 states have return successors, (104), 74 states have call predecessors, (104), 49 states have call successors, (104) [2022-11-25 23:33:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2022-11-25 23:33:06,830 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 88 [2022-11-25 23:33:06,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:06,830 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2022-11-25 23:33:06,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.4) internal successors, (66), 11 states have internal predecessors, (66), 7 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 23:33:06,830 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2022-11-25 23:33:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-25 23:33:06,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:06,833 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2022-11-25 23:33:06,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:07,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 23:33:07,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash -627082395, now seen corresponding path program 1 times [2022-11-25 23:33:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:07,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450411801] [2022-11-25 23:33:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:07,354 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 50 proven. 63 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-25 23:33:07,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450411801] [2022-11-25 23:33:07,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450411801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:07,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885997762] [2022-11-25 23:33:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:07,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:07,358 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:07,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 23:33:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:07,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:33:07,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-11-25 23:33:07,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-11-25 23:33:07,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885997762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:07,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1209218192] [2022-11-25 23:33:07,821 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-25 23:33:07,821 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:07,823 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:07,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:07,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8, 7] total 31 [2022-11-25 23:33:07,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665449721] [2022-11-25 23:33:07,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:07,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 23:33:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:07,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 23:33:07,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:33:07,831 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 23:33:09,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:09,783 INFO L93 Difference]: Finished difference Result 893 states and 1204 transitions. [2022-11-25 23:33:09,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-25 23:33:09,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) Word has length 91 [2022-11-25 23:33:09,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:09,787 INFO L225 Difference]: With dead ends: 893 [2022-11-25 23:33:09,787 INFO L226 Difference]: Without dead ends: 540 [2022-11-25 23:33:09,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 178 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=771, Invalid=4631, Unknown=0, NotChecked=0, Total=5402 [2022-11-25 23:33:09,791 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 335 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:09,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 154 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 1562 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-25 23:33:09,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-11-25 23:33:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 435. [2022-11-25 23:33:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 343 states have (on average 1.1137026239067056) internal successors, (382), 342 states have internal predecessors, (382), 53 states have call successors, (53), 20 states have call predecessors, (53), 35 states have return successors, (119), 72 states have call predecessors, (119), 52 states have call successors, (119) [2022-11-25 23:33:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 554 transitions. [2022-11-25 23:33:09,820 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 554 transitions. Word has length 91 [2022-11-25 23:33:09,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:09,821 INFO L495 AbstractCegarLoop]: Abstraction has 435 states and 554 transitions. [2022-11-25 23:33:09,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 25 states have internal predecessors, (98), 13 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 23:33:09,821 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 554 transitions. [2022-11-25 23:33:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-25 23:33:09,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:09,823 INFO L195 NwaCegarLoop]: trace histogram [7, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:09,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:10,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-25 23:33:10,029 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:10,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1564473870, now seen corresponding path program 1 times [2022-11-25 23:33:10,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:10,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102867548] [2022-11-25 23:33:10,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:10,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:10,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 47 proven. 72 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 23:33:10,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102867548] [2022-11-25 23:33:10,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102867548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:10,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568998959] [2022-11-25 23:33:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:10,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:10,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:10,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 23:33:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:10,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 23:33:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-25 23:33:10,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:11,241 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-25 23:33:11,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568998959] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:11,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1032333723] [2022-11-25 23:33:11,243 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:11,244 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:11,244 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:11,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:11,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9, 11] total 36 [2022-11-25 23:33:11,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570197352] [2022-11-25 23:33:11,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:11,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 23:33:11,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:11,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 23:33:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1156, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:33:11,247 INFO L87 Difference]: Start difference. First operand 435 states and 554 transitions. Second operand has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-25 23:33:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:15,164 INFO L93 Difference]: Finished difference Result 1210 states and 1750 transitions. [2022-11-25 23:33:15,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-11-25 23:33:15,165 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) Word has length 92 [2022-11-25 23:33:15,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:15,171 INFO L225 Difference]: With dead ends: 1210 [2022-11-25 23:33:15,172 INFO L226 Difference]: Without dead ends: 810 [2022-11-25 23:33:15,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3487 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1523, Invalid=10687, Unknown=0, NotChecked=0, Total=12210 [2022-11-25 23:33:15,179 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 471 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 3065 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 3065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:15,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 268 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 3065 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-25 23:33:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-11-25 23:33:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 597. [2022-11-25 23:33:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 475 states have (on average 1.1157894736842104) internal successors, (530), 460 states have internal predecessors, (530), 69 states have call successors, (69), 19 states have call predecessors, (69), 49 states have return successors, (307), 117 states have call predecessors, (307), 68 states have call successors, (307) [2022-11-25 23:33:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 906 transitions. [2022-11-25 23:33:15,240 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 906 transitions. Word has length 92 [2022-11-25 23:33:15,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:15,240 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 906 transitions. [2022-11-25 23:33:15,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 30 states have internal predecessors, (116), 16 states have call successors, (19), 7 states have call predecessors, (19), 8 states have return successors, (16), 14 states have call predecessors, (16), 10 states have call successors, (16) [2022-11-25 23:33:15,241 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 906 transitions. [2022-11-25 23:33:15,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-25 23:33:15,242 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:15,243 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:15,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:15,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-25 23:33:15,448 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:15,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:15,449 INFO L85 PathProgramCache]: Analyzing trace with hash -82062030, now seen corresponding path program 1 times [2022-11-25 23:33:15,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:15,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419287932] [2022-11-25 23:33:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:15,539 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-11-25 23:33:15,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:15,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419287932] [2022-11-25 23:33:15,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419287932] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:15,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085237444] [2022-11-25 23:33:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:15,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:15,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:15,541 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:15,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 23:33:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:15,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:33:15,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 33 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:33:15,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:16,168 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 33 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-25 23:33:16,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085237444] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:16,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [408634759] [2022-11-25 23:33:16,170 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:16,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:16,171 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:16,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:16,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17, 17] total 21 [2022-11-25 23:33:16,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605581665] [2022-11-25 23:33:16,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:16,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 23:33:16,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:16,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 23:33:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-11-25 23:33:16,173 INFO L87 Difference]: Start difference. First operand 597 states and 906 transitions. Second operand has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-25 23:33:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:16,760 INFO L93 Difference]: Finished difference Result 1138 states and 1880 transitions. [2022-11-25 23:33:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:33:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) Word has length 105 [2022-11-25 23:33:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:16,765 INFO L225 Difference]: With dead ends: 1138 [2022-11-25 23:33:16,765 INFO L226 Difference]: Without dead ends: 607 [2022-11-25 23:33:16,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 189 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:33:16,770 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 180 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:16,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 526 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:33:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-11-25 23:33:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 597. [2022-11-25 23:33:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 475 states have (on average 1.1157894736842104) internal successors, (530), 460 states have internal predecessors, (530), 69 states have call successors, (69), 19 states have call predecessors, (69), 49 states have return successors, (305), 117 states have call predecessors, (305), 68 states have call successors, (305) [2022-11-25 23:33:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 904 transitions. [2022-11-25 23:33:16,809 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 904 transitions. Word has length 105 [2022-11-25 23:33:16,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:16,809 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 904 transitions. [2022-11-25 23:33:16,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.65) internal successors, (93), 16 states have internal predecessors, (93), 12 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (12), 4 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-25 23:33:16,810 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 904 transitions. [2022-11-25 23:33:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-25 23:33:16,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:16,811 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:16,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:17,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 23:33:17,017 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1459155797, now seen corresponding path program 2 times [2022-11-25 23:33:17,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:17,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078006143] [2022-11-25 23:33:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:17,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-25 23:33:17,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:17,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078006143] [2022-11-25 23:33:17,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078006143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:17,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334588705] [2022-11-25 23:33:17,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:17,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:17,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:17,351 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:17,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 23:33:17,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 23:33:17,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:17,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:33:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-25 23:33:17,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-25 23:33:17,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334588705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:17,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [133354039] [2022-11-25 23:33:17,748 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:17,748 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:17,748 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:17,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:17,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8, 8] total 23 [2022-11-25 23:33:17,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449842428] [2022-11-25 23:33:17,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:17,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:33:17,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:17,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:33:17,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:33:17,751 INFO L87 Difference]: Start difference. First operand 597 states and 904 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) [2022-11-25 23:33:18,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:18,269 INFO L93 Difference]: Finished difference Result 1034 states and 1653 transitions. [2022-11-25 23:33:18,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-25 23:33:18,269 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 106 [2022-11-25 23:33:18,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:18,276 INFO L225 Difference]: With dead ends: 1034 [2022-11-25 23:33:18,276 INFO L226 Difference]: Without dead ends: 1031 [2022-11-25 23:33:18,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 204 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:33:18,278 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:18,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 600 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:18,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-11-25 23:33:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 782. [2022-11-25 23:33:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 626 states have (on average 1.1086261980830672) internal successors, (694), 598 states have internal predecessors, (694), 85 states have call successors, (85), 19 states have call predecessors, (85), 67 states have return successors, (525), 164 states have call predecessors, (525), 84 states have call successors, (525) [2022-11-25 23:33:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1304 transitions. [2022-11-25 23:33:18,333 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1304 transitions. Word has length 106 [2022-11-25 23:33:18,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:18,333 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1304 transitions. [2022-11-25 23:33:18,333 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) [2022-11-25 23:33:18,334 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1304 transitions. [2022-11-25 23:33:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 23:33:18,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:18,335 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-11-25 23:33:18,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:18,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:18,541 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:18,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2010810646, now seen corresponding path program 1 times [2022-11-25 23:33:18,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:18,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16924260] [2022-11-25 23:33:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:18,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-25 23:33:18,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16924260] [2022-11-25 23:33:18,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16924260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138848843] [2022-11-25 23:33:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:18,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:18,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:18,895 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:18,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 23:33:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:18,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 23:33:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-11-25 23:33:19,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-11-25 23:33:19,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138848843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:19,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [712478140] [2022-11-25 23:33:19,732 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:19,733 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:19,733 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:19,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:19,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 33 [2022-11-25 23:33:19,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428931717] [2022-11-25 23:33:19,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:19,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-25 23:33:19,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:19,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-25 23:33:19,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 23:33:19,738 INFO L87 Difference]: Start difference. First operand 782 states and 1304 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) [2022-11-25 23:33:20,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:20,367 INFO L93 Difference]: Finished difference Result 1492 states and 2676 transitions. [2022-11-25 23:33:20,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 23:33:20,367 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 107 [2022-11-25 23:33:20,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:20,384 INFO L225 Difference]: With dead ends: 1492 [2022-11-25 23:33:20,384 INFO L226 Difference]: Without dead ends: 1490 [2022-11-25 23:33:20,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 191 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 23:33:20,388 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 64 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:20,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 484 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2022-11-25 23:33:20,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1000. [2022-11-25 23:33:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 798 states have (on average 1.0927318295739348) internal successors, (872), 765 states have internal predecessors, (872), 106 states have call successors, (106), 19 states have call predecessors, (106), 92 states have return successors, (946), 215 states have call predecessors, (946), 105 states have call successors, (946) [2022-11-25 23:33:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1924 transitions. [2022-11-25 23:33:20,502 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1924 transitions. Word has length 107 [2022-11-25 23:33:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:20,502 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 1924 transitions. [2022-11-25 23:33:20,502 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) [2022-11-25 23:33:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1924 transitions. [2022-11-25 23:33:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-25 23:33:20,504 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:20,505 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 23:33:20,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:20,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 23:33:20,716 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:20,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:20,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1158692948, now seen corresponding path program 1 times [2022-11-25 23:33:20,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:20,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054169656] [2022-11-25 23:33:20,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:20,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:20,980 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 23:33:20,980 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:20,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054169656] [2022-11-25 23:33:20,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054169656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:20,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437187354] [2022-11-25 23:33:20,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:20,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:20,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:20,982 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:21,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 23:33:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:21,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:33:21,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 23:33:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 68 proven. 114 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-25 23:33:21,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437187354] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:21,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949606405] [2022-11-25 23:33:21,515 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:21,515 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:21,516 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:21,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:21,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2022-11-25 23:33:21,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534311449] [2022-11-25 23:33:21,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 23:33:21,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 23:33:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-11-25 23:33:21,521 INFO L87 Difference]: Start difference. First operand 1000 states and 1924 transitions. Second operand has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:33:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:21,962 INFO L93 Difference]: Finished difference Result 1988 states and 3955 transitions. [2022-11-25 23:33:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:33:21,962 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 141 [2022-11-25 23:33:21,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:21,972 INFO L225 Difference]: With dead ends: 1988 [2022-11-25 23:33:21,972 INFO L226 Difference]: Without dead ends: 1057 [2022-11-25 23:33:21,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 274 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-25 23:33:21,982 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 134 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:21,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 436 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2022-11-25 23:33:22,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1019. [2022-11-25 23:33:22,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 813 states have (on average 1.0910209102091022) internal successors, (887), 780 states have internal predecessors, (887), 107 states have call successors, (107), 19 states have call predecessors, (107), 95 states have return successors, (951), 219 states have call predecessors, (951), 106 states have call successors, (951) [2022-11-25 23:33:22,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1945 transitions. [2022-11-25 23:33:22,060 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1945 transitions. Word has length 141 [2022-11-25 23:33:22,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:22,061 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1945 transitions. [2022-11-25 23:33:22,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.9375) internal successors, (79), 13 states have internal predecessors, (79), 9 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-25 23:33:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1945 transitions. [2022-11-25 23:33:22,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-25 23:33:22,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:22,064 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 10, 9, 8, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1] [2022-11-25 23:33:22,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:22,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 23:33:22,270 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:22,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:22,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1327362035, now seen corresponding path program 1 times [2022-11-25 23:33:22,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:22,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718239124] [2022-11-25 23:33:22,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:22,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 94 proven. 248 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-25 23:33:22,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718239124] [2022-11-25 23:33:22,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718239124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:22,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591978721] [2022-11-25 23:33:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:22,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:22,718 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:22,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 23:33:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:22,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:33:22,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:22,958 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 154 proven. 157 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-11-25 23:33:22,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 621 backedges. 154 proven. 158 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-11-25 23:33:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591978721] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:23,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [978517623] [2022-11-25 23:33:23,518 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:23,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:23,519 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:23,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:23,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 24 [2022-11-25 23:33:23,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920290298] [2022-11-25 23:33:23,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:23,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:33:23,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:33:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:33:23,524 INFO L87 Difference]: Start difference. First operand 1019 states and 1945 transitions. Second operand has 24 states, 23 states have (on average 5.260869565217392) internal successors, (121), 20 states have internal predecessors, (121), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-25 23:33:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:24,181 INFO L93 Difference]: Finished difference Result 2038 states and 4316 transitions. [2022-11-25 23:33:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 23:33:24,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.260869565217392) internal successors, (121), 20 states have internal predecessors, (121), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) Word has length 195 [2022-11-25 23:33:24,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:24,192 INFO L225 Difference]: With dead ends: 2038 [2022-11-25 23:33:24,193 INFO L226 Difference]: Without dead ends: 1034 [2022-11-25 23:33:24,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:33:24,211 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 251 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:24,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 201 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:24,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2022-11-25 23:33:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 931. [2022-11-25 23:33:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 738 states have (on average 1.0772357723577235) internal successors, (795), 718 states have internal predecessors, (795), 100 states have call successors, (100), 19 states have call predecessors, (100), 89 states have return successors, (680), 193 states have call predecessors, (680), 99 states have call successors, (680) [2022-11-25 23:33:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1575 transitions. [2022-11-25 23:33:24,307 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1575 transitions. Word has length 195 [2022-11-25 23:33:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:24,308 INFO L495 AbstractCegarLoop]: Abstraction has 931 states and 1575 transitions. [2022-11-25 23:33:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.260869565217392) internal successors, (121), 20 states have internal predecessors, (121), 14 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (21), 11 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-25 23:33:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1575 transitions. [2022-11-25 23:33:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-25 23:33:24,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:24,311 INFO L195 NwaCegarLoop]: trace histogram [10, 8, 8, 8, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2022-11-25 23:33:24,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 23:33:24,517 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:24,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1752795634, now seen corresponding path program 2 times [2022-11-25 23:33:24,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:24,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555456381] [2022-11-25 23:33:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:24,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:24,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:25,206 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 45 proven. 85 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-11-25 23:33:25,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:25,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555456381] [2022-11-25 23:33:25,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555456381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:25,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347022256] [2022-11-25 23:33:25,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:25,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:25,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:25,208 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:25,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 23:33:25,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-25 23:33:25,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:25,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 23:33:25,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 45 proven. 59 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-25 23:33:25,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:27,053 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 74 proven. 54 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-25 23:33:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347022256] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1447096010] [2022-11-25 23:33:27,055 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:27,055 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:27,056 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:27,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:27,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 22] total 44 [2022-11-25 23:33:27,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588560465] [2022-11-25 23:33:27,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:27,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-25 23:33:27,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:27,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-25 23:33:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1724, Unknown=0, NotChecked=0, Total=1980 [2022-11-25 23:33:27,058 INFO L87 Difference]: Start difference. First operand 931 states and 1575 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) [2022-11-25 23:33:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:28,157 INFO L93 Difference]: Finished difference Result 1375 states and 2259 transitions. [2022-11-25 23:33:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-25 23:33:28,158 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 160 [2022-11-25 23:33:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:28,168 INFO L225 Difference]: With dead ends: 1375 [2022-11-25 23:33:28,168 INFO L226 Difference]: Without dead ends: 1370 [2022-11-25 23:33:28,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 291 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=4903, Unknown=0, NotChecked=0, Total=5700 [2022-11-25 23:33:28,173 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 56 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:28,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 878 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-25 23:33:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2022-11-25 23:33:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 929. [2022-11-25 23:33:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 737 states have (on average 1.0705563093622794) internal successors, (789), 717 states have internal predecessors, (789), 97 states have call successors, (97), 19 states have call predecessors, (97), 91 states have return successors, (634), 192 states have call predecessors, (634), 95 states have call successors, (634) [2022-11-25 23:33:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 1520 transitions. [2022-11-25 23:33:28,265 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 1520 transitions. Word has length 160 [2022-11-25 23:33:28,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:28,265 INFO L495 AbstractCegarLoop]: Abstraction has 929 states and 1520 transitions. [2022-11-25 23:33:28,265 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) [2022-11-25 23:33:28,266 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 1520 transitions. [2022-11-25 23:33:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-11-25 23:33:28,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:28,269 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 10, 9, 9, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1] [2022-11-25 23:33:28,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:28,475 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:28,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash -661999704, now seen corresponding path program 3 times [2022-11-25 23:33:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:28,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949484169] [2022-11-25 23:33:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:28,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 131 proven. 176 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-11-25 23:33:28,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:28,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949484169] [2022-11-25 23:33:28,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949484169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:28,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733409074] [2022-11-25 23:33:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:33:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:28,885 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:28,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 23:33:28,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:33:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:33:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 169 proven. 232 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2022-11-25 23:33:29,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 169 proven. 239 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2022-11-25 23:33:30,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733409074] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:30,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881968795] [2022-11-25 23:33:30,109 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:30,109 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:30,110 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:30,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:30,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17] total 32 [2022-11-25 23:33:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226483509] [2022-11-25 23:33:30,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:30,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:33:30,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:30,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:33:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:33:30,113 INFO L87 Difference]: Start difference. First operand 929 states and 1520 transitions. Second operand has 32 states, 31 states have (on average 4.935483870967742) internal successors, (153), 27 states have internal predecessors, (153), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-25 23:33:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:31,336 INFO L93 Difference]: Finished difference Result 2120 states and 4141 transitions. [2022-11-25 23:33:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 23:33:31,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.935483870967742) internal successors, (153), 27 states have internal predecessors, (153), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) Word has length 209 [2022-11-25 23:33:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:31,347 INFO L225 Difference]: With dead ends: 2120 [2022-11-25 23:33:31,348 INFO L226 Difference]: Without dead ends: 1239 [2022-11-25 23:33:31,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 399 SyntacticMatches, 9 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=468, Invalid=2502, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 23:33:31,360 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 426 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:31,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 249 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:33:31,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-11-25 23:33:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1072. [2022-11-25 23:33:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 852 states have (on average 1.0704225352112675) internal successors, (912), 828 states have internal predecessors, (912), 114 states have call successors, (114), 28 states have call predecessors, (114), 102 states have return successors, (757), 215 states have call predecessors, (757), 113 states have call successors, (757) [2022-11-25 23:33:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1783 transitions. [2022-11-25 23:33:31,449 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1783 transitions. Word has length 209 [2022-11-25 23:33:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:31,450 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1783 transitions. [2022-11-25 23:33:31,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.935483870967742) internal successors, (153), 27 states have internal predecessors, (153), 20 states have call successors, (28), 6 states have call predecessors, (28), 7 states have return successors, (24), 10 states have call predecessors, (24), 16 states have call successors, (24) [2022-11-25 23:33:31,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1783 transitions. [2022-11-25 23:33:31,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-25 23:33:31,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:31,455 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 13, 12, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1] [2022-11-25 23:33:31,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:31,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:31,661 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -812792613, now seen corresponding path program 4 times [2022-11-25 23:33:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:31,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806445530] [2022-11-25 23:33:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 218 proven. 201 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2022-11-25 23:33:32,083 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:32,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806445530] [2022-11-25 23:33:32,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806445530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:32,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983096664] [2022-11-25 23:33:32,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:33:32,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:32,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:32,087 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:32,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 23:33:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:33:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 721 proven. 126 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2022-11-25 23:33:32,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 1219 backedges. 203 proven. 327 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2022-11-25 23:33:33,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983096664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:33,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1904270153] [2022-11-25 23:33:33,149 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:33,149 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:33,149 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:33,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:33,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 15] total 31 [2022-11-25 23:33:33,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741536724] [2022-11-25 23:33:33,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:33,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 23:33:33,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 23:33:33,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:33:33,152 INFO L87 Difference]: Start difference. First operand 1072 states and 1783 transitions. Second operand has 31 states, 29 states have (on average 5.482758620689655) internal successors, (159), 24 states have internal predecessors, (159), 17 states have call successors, (32), 10 states have call predecessors, (32), 6 states have return successors, (24), 12 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-25 23:33:34,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:34,366 INFO L93 Difference]: Finished difference Result 2316 states and 3992 transitions. [2022-11-25 23:33:34,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 23:33:34,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 5.482758620689655) internal successors, (159), 24 states have internal predecessors, (159), 17 states have call successors, (32), 10 states have call predecessors, (32), 6 states have return successors, (24), 12 states have call predecessors, (24), 10 states have call successors, (24) Word has length 269 [2022-11-25 23:33:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:34,379 INFO L225 Difference]: With dead ends: 2316 [2022-11-25 23:33:34,379 INFO L226 Difference]: Without dead ends: 1325 [2022-11-25 23:33:34,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 520 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=286, Invalid=2164, Unknown=0, NotChecked=0, Total=2450 [2022-11-25 23:33:34,389 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 335 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:34,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 610 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:33:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-11-25 23:33:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1226. [2022-11-25 23:33:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 974 states have (on average 1.0677618069815196) internal successors, (1040), 948 states have internal predecessors, (1040), 134 states have call successors, (134), 33 states have call predecessors, (134), 114 states have return successors, (873), 244 states have call predecessors, (873), 133 states have call successors, (873) [2022-11-25 23:33:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2047 transitions. [2022-11-25 23:33:34,528 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2047 transitions. Word has length 269 [2022-11-25 23:33:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:34,530 INFO L495 AbstractCegarLoop]: Abstraction has 1226 states and 2047 transitions. [2022-11-25 23:33:34,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 5.482758620689655) internal successors, (159), 24 states have internal predecessors, (159), 17 states have call successors, (32), 10 states have call predecessors, (32), 6 states have return successors, (24), 12 states have call predecessors, (24), 10 states have call successors, (24) [2022-11-25 23:33:34,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2047 transitions. [2022-11-25 23:33:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-11-25 23:33:34,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:34,537 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 12, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 1, 1, 1] [2022-11-25 23:33:34,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:34,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-25 23:33:34,743 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:34,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:34,744 INFO L85 PathProgramCache]: Analyzing trace with hash -2022428925, now seen corresponding path program 5 times [2022-11-25 23:33:34,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:34,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281539832] [2022-11-25 23:33:34,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:34,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 146 proven. 170 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-25 23:33:35,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281539832] [2022-11-25 23:33:35,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281539832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:35,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146932371] [2022-11-25 23:33:35,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:35,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:35,024 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:35,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 23:33:35,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 23:33:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:35,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:33:35,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 324 proven. 5 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2022-11-25 23:33:35,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 267 proven. 11 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-11-25 23:33:35,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146932371] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:35,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904494036] [2022-11-25 23:33:35,847 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:35,848 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:35,848 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:35,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:35,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 24 [2022-11-25 23:33:35,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697393892] [2022-11-25 23:33:35,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:35,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:33:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:35,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:33:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:33:35,851 INFO L87 Difference]: Start difference. First operand 1226 states and 2047 transitions. Second operand has 24 states, 23 states have (on average 5.173913043478261) internal successors, (119), 21 states have internal predecessors, (119), 11 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-25 23:33:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:36,759 INFO L93 Difference]: Finished difference Result 2138 states and 3659 transitions. [2022-11-25 23:33:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-25 23:33:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.173913043478261) internal successors, (119), 21 states have internal predecessors, (119), 11 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) Word has length 250 [2022-11-25 23:33:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:36,767 INFO L225 Difference]: With dead ends: 2138 [2022-11-25 23:33:36,767 INFO L226 Difference]: Without dead ends: 1010 [2022-11-25 23:33:36,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 493 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=1331, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 23:33:36,776 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 238 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:36,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 551 Invalid, 1126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 23:33:36,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-11-25 23:33:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 863. [2022-11-25 23:33:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 688 states have (on average 1.061046511627907) internal successors, (730), 670 states have internal predecessors, (730), 100 states have call successors, (100), 38 states have call predecessors, (100), 71 states have return successors, (308), 154 states have call predecessors, (308), 99 states have call successors, (308) [2022-11-25 23:33:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1138 transitions. [2022-11-25 23:33:36,836 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1138 transitions. Word has length 250 [2022-11-25 23:33:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:36,836 INFO L495 AbstractCegarLoop]: Abstraction has 863 states and 1138 transitions. [2022-11-25 23:33:36,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.173913043478261) internal successors, (119), 21 states have internal predecessors, (119), 11 states have call successors, (20), 5 states have call predecessors, (20), 8 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-25 23:33:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1138 transitions. [2022-11-25 23:33:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-11-25 23:33:36,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:36,841 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 11, 11, 10, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1] [2022-11-25 23:33:36,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-25 23:33:37,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-25 23:33:37,046 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:37,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:37,047 INFO L85 PathProgramCache]: Analyzing trace with hash -2096935998, now seen corresponding path program 2 times [2022-11-25 23:33:37,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:37,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89541873] [2022-11-25 23:33:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:37,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:37,186 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 872 trivial. 0 not checked. [2022-11-25 23:33:37,186 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:37,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89541873] [2022-11-25 23:33:37,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89541873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:37,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114717028] [2022-11-25 23:33:37,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:37,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:37,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:37,188 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:37,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 23:33:37,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 23:33:37,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 23:33:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 881 trivial. 0 not checked. [2022-11-25 23:33:37,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 23:33:37,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114717028] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 23:33:37,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 23:33:37,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-11-25 23:33:37,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622659826] [2022-11-25 23:33:37,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 23:33:37,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 23:33:37,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:37,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 23:33:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:33:37,383 INFO L87 Difference]: Start difference. First operand 863 states and 1138 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:33:37,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:37,479 INFO L93 Difference]: Finished difference Result 880 states and 1158 transitions. [2022-11-25 23:33:37,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 23:33:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 245 [2022-11-25 23:33:37,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:37,485 INFO L225 Difference]: With dead ends: 880 [2022-11-25 23:33:37,485 INFO L226 Difference]: Without dead ends: 879 [2022-11-25 23:33:37,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-11-25 23:33:37,487 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:37,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 210 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 23:33:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-11-25 23:33:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 865. [2022-11-25 23:33:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 865 states, 690 states have (on average 1.0608695652173914) internal successors, (732), 671 states have internal predecessors, (732), 100 states have call successors, (100), 38 states have call predecessors, (100), 71 states have return successors, (306), 155 states have call predecessors, (306), 99 states have call successors, (306) [2022-11-25 23:33:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1138 transitions. [2022-11-25 23:33:37,537 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1138 transitions. Word has length 245 [2022-11-25 23:33:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:37,538 INFO L495 AbstractCegarLoop]: Abstraction has 865 states and 1138 transitions. [2022-11-25 23:33:37,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 8 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 23:33:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1138 transitions. [2022-11-25 23:33:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-11-25 23:33:37,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:37,542 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 12, 11, 11, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1] [2022-11-25 23:33:37,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:37,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-25 23:33:37,748 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:37,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:37,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1633836871, now seen corresponding path program 6 times [2022-11-25 23:33:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:37,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245493738] [2022-11-25 23:33:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:37,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 317 proven. 228 refuted. 0 times theorem prover too weak. 664 trivial. 0 not checked. [2022-11-25 23:33:38,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245493738] [2022-11-25 23:33:38,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245493738] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136507771] [2022-11-25 23:33:38,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:33:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:38,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:38,232 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:38,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-25 23:33:38,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:33:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-25 23:33:38,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 273 proven. 425 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2022-11-25 23:33:38,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 272 proven. 446 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2022-11-25 23:33:40,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136507771] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:40,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [921346820] [2022-11-25 23:33:40,421 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:40,421 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:40,421 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:40,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:40,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 22] total 36 [2022-11-25 23:33:40,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940547708] [2022-11-25 23:33:40,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:40,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 23:33:40,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 23:33:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 23:33:40,424 INFO L87 Difference]: Start difference. First operand 865 states and 1138 transitions. Second operand has 36 states, 35 states have (on average 5.171428571428572) internal successors, (181), 33 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 12 states have call predecessors, (32), 22 states have call successors, (32) [2022-11-25 23:33:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:41,885 INFO L93 Difference]: Finished difference Result 1629 states and 2278 transitions. [2022-11-25 23:33:41,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 23:33:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 5.171428571428572) internal successors, (181), 33 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 12 states have call predecessors, (32), 22 states have call successors, (32) Word has length 269 [2022-11-25 23:33:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:41,891 INFO L225 Difference]: With dead ends: 1629 [2022-11-25 23:33:41,891 INFO L226 Difference]: Without dead ends: 850 [2022-11-25 23:33:41,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 515 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=594, Invalid=3066, Unknown=0, NotChecked=0, Total=3660 [2022-11-25 23:33:41,897 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 424 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:41,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 414 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:33:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-25 23:33:41,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 802. [2022-11-25 23:33:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 638 states have (on average 1.054858934169279) internal successors, (673), 625 states have internal predecessors, (673), 94 states have call successors, (94), 38 states have call predecessors, (94), 66 states have return successors, (228), 138 states have call predecessors, (228), 93 states have call successors, (228) [2022-11-25 23:33:41,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 995 transitions. [2022-11-25 23:33:41,946 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 995 transitions. Word has length 269 [2022-11-25 23:33:41,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:41,946 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 995 transitions. [2022-11-25 23:33:41,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 5.171428571428572) internal successors, (181), 33 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 10 states have return successors, (32), 12 states have call predecessors, (32), 22 states have call successors, (32) [2022-11-25 23:33:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 995 transitions. [2022-11-25 23:33:41,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-11-25 23:33:41,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:41,951 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2022-11-25 23:33:41,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-25 23:33:42,156 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:42,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:42,156 INFO L85 PathProgramCache]: Analyzing trace with hash -134365163, now seen corresponding path program 2 times [2022-11-25 23:33:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:42,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380954995] [2022-11-25 23:33:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 149 proven. 248 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-11-25 23:33:43,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:43,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380954995] [2022-11-25 23:33:43,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380954995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:43,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082578939] [2022-11-25 23:33:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:43,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:43,438 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:43,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-25 23:33:43,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-25 23:33:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 23:33:43,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:44,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 148 proven. 181 refuted. 0 times theorem prover too weak. 719 trivial. 0 not checked. [2022-11-25 23:33:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1048 backedges. 218 proven. 160 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2022-11-25 23:33:47,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082578939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:47,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554756345] [2022-11-25 23:33:47,150 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:47,150 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:47,150 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:47,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:47,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 29] total 56 [2022-11-25 23:33:47,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583639194] [2022-11-25 23:33:47,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-25 23:33:47,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-25 23:33:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2022-11-25 23:33:47,154 INFO L87 Difference]: Start difference. First operand 802 states and 995 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) [2022-11-25 23:33:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:47,701 INFO L93 Difference]: Finished difference Result 940 states and 1160 transitions. [2022-11-25 23:33:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-25 23:33:47,702 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 252 [2022-11-25 23:33:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:47,707 INFO L225 Difference]: With dead ends: 940 [2022-11-25 23:33:47,707 INFO L226 Difference]: Without dead ends: 938 [2022-11-25 23:33:47,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 469 SyntacticMatches, 27 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=550, Invalid=3872, Unknown=0, NotChecked=0, Total=4422 [2022-11-25 23:33:47,710 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 25 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:47,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 752 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:47,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-11-25 23:33:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 777. [2022-11-25 23:33:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 616 states have (on average 1.0438311688311688) internal successors, (643), 608 states have internal predecessors, (643), 92 states have call successors, (92), 38 states have call predecessors, (92), 65 states have return successors, (217), 130 states have call predecessors, (217), 91 states have call successors, (217) [2022-11-25 23:33:47,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 952 transitions. [2022-11-25 23:33:47,758 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 952 transitions. Word has length 252 [2022-11-25 23:33:47,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:47,759 INFO L495 AbstractCegarLoop]: Abstraction has 777 states and 952 transitions. [2022-11-25 23:33:47,759 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) [2022-11-25 23:33:47,759 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 952 transitions. [2022-11-25 23:33:47,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-11-25 23:33:47,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:47,763 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 16, 15, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 5, 4, 3, 1, 1, 1] [2022-11-25 23:33:47,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:47,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-25 23:33:47,968 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash -598627515, now seen corresponding path program 3 times [2022-11-25 23:33:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:47,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580184704] [2022-11-25 23:33:47,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2012 backedges. 325 proven. 185 refuted. 0 times theorem prover too weak. 1502 trivial. 0 not checked. [2022-11-25 23:33:48,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580184704] [2022-11-25 23:33:48,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580184704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:48,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796632521] [2022-11-25 23:33:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:33:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:48,371 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:48,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-25 23:33:48,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:33:48,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:48,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 23:33:48,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2012 backedges. 425 proven. 593 refuted. 0 times theorem prover too weak. 994 trivial. 0 not checked. [2022-11-25 23:33:48,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2012 backedges. 425 proven. 622 refuted. 0 times theorem prover too weak. 965 trivial. 0 not checked. [2022-11-25 23:33:50,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796632521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:50,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1484790348] [2022-11-25 23:33:50,775 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:50,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:50,776 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:50,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:50,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 23] total 32 [2022-11-25 23:33:50,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012472657] [2022-11-25 23:33:50,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:50,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 23:33:50,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:50,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 23:33:50,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-11-25 23:33:50,781 INFO L87 Difference]: Start difference. First operand 777 states and 952 transitions. Second operand has 32 states, 31 states have (on average 5.67741935483871) internal successors, (176), 30 states have internal predecessors, (176), 24 states have call successors, (30), 3 states have call predecessors, (30), 12 states have return successors, (33), 12 states have call predecessors, (33), 22 states have call successors, (33) [2022-11-25 23:33:51,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:51,997 INFO L93 Difference]: Finished difference Result 1602 states and 2073 transitions. [2022-11-25 23:33:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 23:33:51,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.67741935483871) internal successors, (176), 30 states have internal predecessors, (176), 24 states have call successors, (30), 3 states have call predecessors, (30), 12 states have return successors, (33), 12 states have call predecessors, (33), 22 states have call successors, (33) Word has length 343 [2022-11-25 23:33:51,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:52,004 INFO L225 Difference]: With dead ends: 1602 [2022-11-25 23:33:52,004 INFO L226 Difference]: Without dead ends: 983 [2022-11-25 23:33:52,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 724 GetRequests, 662 SyntacticMatches, 11 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=2355, Unknown=0, NotChecked=0, Total=2756 [2022-11-25 23:33:52,008 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 340 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 1631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:52,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 613 Invalid, 1631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-25 23:33:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-11-25 23:33:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 916. [2022-11-25 23:33:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 729 states have (on average 1.0411522633744856) internal successors, (759), 716 states have internal predecessors, (759), 109 states have call successors, (109), 51 states have call predecessors, (109), 74 states have return successors, (283), 148 states have call predecessors, (283), 108 states have call successors, (283) [2022-11-25 23:33:52,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1151 transitions. [2022-11-25 23:33:52,066 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1151 transitions. Word has length 343 [2022-11-25 23:33:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:52,067 INFO L495 AbstractCegarLoop]: Abstraction has 916 states and 1151 transitions. [2022-11-25 23:33:52,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.67741935483871) internal successors, (176), 30 states have internal predecessors, (176), 24 states have call successors, (30), 3 states have call predecessors, (30), 12 states have return successors, (33), 12 states have call predecessors, (33), 22 states have call successors, (33) [2022-11-25 23:33:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1151 transitions. [2022-11-25 23:33:52,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-25 23:33:52,071 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:52,071 INFO L195 NwaCegarLoop]: trace histogram [23, 21, 20, 18, 17, 16, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 4, 1, 1, 1] [2022-11-25 23:33:52,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-11-25 23:33:52,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:52,277 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash 137547764, now seen corresponding path program 4 times [2022-11-25 23:33:52,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:52,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798514558] [2022-11-25 23:33:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:52,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 446 proven. 280 refuted. 0 times theorem prover too weak. 2070 trivial. 0 not checked. [2022-11-25 23:33:52,881 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798514558] [2022-11-25 23:33:52,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798514558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779664882] [2022-11-25 23:33:52,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:33:52,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:52,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:52,883 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:52,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-25 23:33:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:33:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 1098 proven. 195 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2022-11-25 23:33:53,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:53,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2796 backedges. 502 proven. 294 refuted. 0 times theorem prover too weak. 2000 trivial. 0 not checked. [2022-11-25 23:33:53,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779664882] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:53,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1300719949] [2022-11-25 23:33:53,946 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:53,947 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:53,947 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:53,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:53,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 22 [2022-11-25 23:33:53,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569617208] [2022-11-25 23:33:53,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:53,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:33:53,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:53,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:33:53,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:33:53,950 INFO L87 Difference]: Start difference. First operand 916 states and 1151 transitions. Second operand has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 18 states have internal predecessors, (130), 13 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-25 23:33:54,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:54,567 INFO L93 Difference]: Finished difference Result 1937 states and 2423 transitions. [2022-11-25 23:33:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 23:33:54,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 18 states have internal predecessors, (130), 13 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) Word has length 401 [2022-11-25 23:33:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:54,575 INFO L225 Difference]: With dead ends: 1937 [2022-11-25 23:33:54,575 INFO L226 Difference]: Without dead ends: 1006 [2022-11-25 23:33:54,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 788 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 23:33:54,579 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 172 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:54,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 296 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:54,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-25 23:33:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 950. [2022-11-25 23:33:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 757 states have (on average 1.0409511228533685) internal successors, (788), 746 states have internal predecessors, (788), 107 states have call successors, (107), 59 states have call predecessors, (107), 82 states have return successors, (250), 144 states have call predecessors, (250), 106 states have call successors, (250) [2022-11-25 23:33:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1145 transitions. [2022-11-25 23:33:54,635 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1145 transitions. Word has length 401 [2022-11-25 23:33:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:54,636 INFO L495 AbstractCegarLoop]: Abstraction has 950 states and 1145 transitions. [2022-11-25 23:33:54,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.190476190476191) internal successors, (130), 18 states have internal predecessors, (130), 13 states have call successors, (24), 6 states have call predecessors, (24), 5 states have return successors, (20), 8 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-25 23:33:54,636 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1145 transitions. [2022-11-25 23:33:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-11-25 23:33:54,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:54,639 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 18, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 5, 3, 1, 1, 1] [2022-11-25 23:33:54,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:54,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-25 23:33:54,846 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:54,846 INFO L85 PathProgramCache]: Analyzing trace with hash 692080394, now seen corresponding path program 5 times [2022-11-25 23:33:54,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:54,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752351614] [2022-11-25 23:33:54,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:54,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:55,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 384 proven. 191 refuted. 0 times theorem prover too weak. 1941 trivial. 0 not checked. [2022-11-25 23:33:55,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752351614] [2022-11-25 23:33:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752351614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69133331] [2022-11-25 23:33:55,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:33:55,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:55,255 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:55,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-25 23:33:55,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 23:33:55,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:33:55,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 23:33:55,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 623 proven. 41 refuted. 0 times theorem prover too weak. 1852 trivial. 0 not checked. [2022-11-25 23:33:55,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2516 backedges. 623 proven. 42 refuted. 0 times theorem prover too weak. 1851 trivial. 0 not checked. [2022-11-25 23:33:56,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69133331] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:56,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769509628] [2022-11-25 23:33:56,584 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:56,584 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:56,585 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:56,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:56,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 24 [2022-11-25 23:33:56,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037091661] [2022-11-25 23:33:56,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 23:33:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 23:33:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-11-25 23:33:56,587 INFO L87 Difference]: Start difference. First operand 950 states and 1145 transitions. Second operand has 24 states, 23 states have (on average 5.869565217391305) internal successors, (135), 22 states have internal predecessors, (135), 14 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-25 23:33:57,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:57,257 INFO L93 Difference]: Finished difference Result 1824 states and 2241 transitions. [2022-11-25 23:33:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 23:33:57,258 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.869565217391305) internal successors, (135), 22 states have internal predecessors, (135), 14 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) Word has length 382 [2022-11-25 23:33:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:57,264 INFO L225 Difference]: With dead ends: 1824 [2022-11-25 23:33:57,264 INFO L226 Difference]: Without dead ends: 1043 [2022-11-25 23:33:57,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 753 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 23:33:57,267 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 222 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:57,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 390 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:33:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-11-25 23:33:57,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 960. [2022-11-25 23:33:57,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 766 states have (on average 1.0404699738903394) internal successors, (797), 752 states have internal predecessors, (797), 108 states have call successors, (108), 61 states have call predecessors, (108), 82 states have return successors, (246), 146 states have call predecessors, (246), 107 states have call successors, (246) [2022-11-25 23:33:57,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1151 transitions. [2022-11-25 23:33:57,326 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1151 transitions. Word has length 382 [2022-11-25 23:33:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:57,326 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1151 transitions. [2022-11-25 23:33:57,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.869565217391305) internal successors, (135), 22 states have internal predecessors, (135), 14 states have call successors, (24), 3 states have call predecessors, (24), 9 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2022-11-25 23:33:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1151 transitions. [2022-11-25 23:33:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2022-11-25 23:33:57,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:57,330 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 19, 16, 15, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 6, 5, 5, 5, 1, 1, 1] [2022-11-25 23:33:57,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:57,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-25 23:33:57,536 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:57,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1524248973, now seen corresponding path program 7 times [2022-11-25 23:33:57,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902034099] [2022-11-25 23:33:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:57,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 263 proven. 40 refuted. 0 times theorem prover too weak. 2378 trivial. 0 not checked. [2022-11-25 23:33:57,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:33:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902034099] [2022-11-25 23:33:57,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902034099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:33:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349350454] [2022-11-25 23:33:57,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:33:57,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:33:57,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:33:57,839 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:33:57,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-25 23:33:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:33:58,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 23:33:58,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:33:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 973 proven. 186 refuted. 0 times theorem prover too weak. 1522 trivial. 0 not checked. [2022-11-25 23:33:58,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:33:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2681 backedges. 419 proven. 267 refuted. 0 times theorem prover too weak. 1995 trivial. 0 not checked. [2022-11-25 23:33:58,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349350454] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:33:58,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798861601] [2022-11-25 23:33:58,954 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:33:58,955 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:33:58,955 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:33:58,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:33:58,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 15] total 19 [2022-11-25 23:33:58,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67738160] [2022-11-25 23:33:58,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:33:58,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 23:33:58,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:33:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 23:33:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-25 23:33:58,958 INFO L87 Difference]: Start difference. First operand 960 states and 1151 transitions. Second operand has 19 states, 18 states have (on average 6.666666666666667) internal successors, (120), 16 states have internal predecessors, (120), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-25 23:33:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:33:59,368 INFO L93 Difference]: Finished difference Result 1597 states and 1930 transitions. [2022-11-25 23:33:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 23:33:59,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 6.666666666666667) internal successors, (120), 16 states have internal predecessors, (120), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) Word has length 394 [2022-11-25 23:33:59,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:33:59,373 INFO L225 Difference]: With dead ends: 1597 [2022-11-25 23:33:59,373 INFO L226 Difference]: Without dead ends: 800 [2022-11-25 23:33:59,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 768 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-11-25 23:33:59,376 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 120 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:33:59,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 309 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:33:59,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-11-25 23:33:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 771. [2022-11-25 23:33:59,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 614 states have (on average 1.0390879478827362) internal successors, (638), 607 states have internal predecessors, (638), 89 states have call successors, (89), 56 states have call predecessors, (89), 64 states have return successors, (151), 107 states have call predecessors, (151), 88 states have call successors, (151) [2022-11-25 23:33:59,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 878 transitions. [2022-11-25 23:33:59,420 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 878 transitions. Word has length 394 [2022-11-25 23:33:59,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:33:59,421 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 878 transitions. [2022-11-25 23:33:59,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 6.666666666666667) internal successors, (120), 16 states have internal predecessors, (120), 12 states have call successors, (23), 5 states have call predecessors, (23), 5 states have return successors, (21), 7 states have call predecessors, (21), 10 states have call successors, (21) [2022-11-25 23:33:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 878 transitions. [2022-11-25 23:33:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2022-11-25 23:33:59,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:33:59,424 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 17, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 7, 6, 4, 4, 1, 1, 1] [2022-11-25 23:33:59,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-25 23:33:59,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-25 23:33:59,631 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:33:59,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:33:59,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1497925245, now seen corresponding path program 6 times [2022-11-25 23:33:59,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:33:59,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194921659] [2022-11-25 23:33:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:33:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:33:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 236 proven. 896 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-25 23:34:02,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:02,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194921659] [2022-11-25 23:34:02,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194921659] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:02,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436692452] [2022-11-25 23:34:02,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:34:02,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:02,800 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:02,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-25 23:34:03,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:34:03,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:03,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 23:34:03,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 781 proven. 51 refuted. 0 times theorem prover too weak. 1961 trivial. 0 not checked. [2022-11-25 23:34:03,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:05,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2793 backedges. 781 proven. 51 refuted. 0 times theorem prover too weak. 1961 trivial. 0 not checked. [2022-11-25 23:34:05,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436692452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:05,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1180960267] [2022-11-25 23:34:05,962 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:05,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:05,962 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:05,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:05,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 21, 21] total 50 [2022-11-25 23:34:05,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536266408] [2022-11-25 23:34:05,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:05,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-25 23:34:05,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-25 23:34:05,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2306, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 23:34:05,966 INFO L87 Difference]: Start difference. First operand 771 states and 878 transitions. Second operand has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-25 23:34:06,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:06,585 INFO L93 Difference]: Finished difference Result 830 states and 946 transitions. [2022-11-25 23:34:06,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-25 23:34:06,586 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) Word has length 402 [2022-11-25 23:34:06,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:06,590 INFO L225 Difference]: With dead ends: 830 [2022-11-25 23:34:06,590 INFO L226 Difference]: Without dead ends: 828 [2022-11-25 23:34:06,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 896 GetRequests, 812 SyntacticMatches, 24 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2005 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=406, Invalid=3376, Unknown=0, NotChecked=0, Total=3782 [2022-11-25 23:34:06,591 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 42 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:06,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 847 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:34:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-25 23:34:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 737. [2022-11-25 23:34:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 588 states have (on average 1.032312925170068) internal successors, (607), 581 states have internal predecessors, (607), 86 states have call successors, (86), 56 states have call predecessors, (86), 61 states have return successors, (136), 99 states have call predecessors, (136), 85 states have call successors, (136) [2022-11-25 23:34:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 829 transitions. [2022-11-25 23:34:06,631 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 829 transitions. Word has length 402 [2022-11-25 23:34:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:06,632 INFO L495 AbstractCegarLoop]: Abstraction has 737 states and 829 transitions. [2022-11-25 23:34:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.02) internal successors, (151), 51 states have internal predecessors, (151), 13 states have call successors, (17), 1 states have call predecessors, (17), 16 states have return successors, (36), 33 states have call predecessors, (36), 13 states have call successors, (36) [2022-11-25 23:34:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 829 transitions. [2022-11-25 23:34:06,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-11-25 23:34:06,635 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:06,636 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 17, 17, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 7, 6, 4, 4, 1, 1, 1] [2022-11-25 23:34:06,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:06,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:06,842 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash 808957732, now seen corresponding path program 3 times [2022-11-25 23:34:06,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:06,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324088703] [2022-11-25 23:34:06,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:06,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 440 proven. 701 refuted. 0 times theorem prover too weak. 1661 trivial. 0 not checked. [2022-11-25 23:34:09,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324088703] [2022-11-25 23:34:09,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324088703] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:09,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340423381] [2022-11-25 23:34:09,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:34:09,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:09,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:09,529 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:09,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-25 23:34:09,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:34:09,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-25 23:34:09,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:10,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 432 proven. 525 refuted. 0 times theorem prover too weak. 1845 trivial. 0 not checked. [2022-11-25 23:34:10,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2802 backedges. 585 proven. 468 refuted. 0 times theorem prover too weak. 1749 trivial. 0 not checked. [2022-11-25 23:34:17,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340423381] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:17,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385711288] [2022-11-25 23:34:17,489 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:17,489 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:17,489 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:17,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:17,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 37] total 68 [2022-11-25 23:34:17,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576761043] [2022-11-25 23:34:17,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-25 23:34:17,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-25 23:34:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=4133, Unknown=0, NotChecked=0, Total=4692 [2022-11-25 23:34:17,493 INFO L87 Difference]: Start difference. First operand 737 states and 829 transitions. Second operand has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-25 23:34:18,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:18,082 INFO L93 Difference]: Finished difference Result 917 states and 1052 transitions. [2022-11-25 23:34:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 23:34:18,083 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) Word has length 403 [2022-11-25 23:34:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:18,088 INFO L225 Difference]: With dead ends: 917 [2022-11-25 23:34:18,088 INFO L226 Difference]: Without dead ends: 909 [2022-11-25 23:34:18,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 767 SyntacticMatches, 51 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5926 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=785, Invalid=5695, Unknown=0, NotChecked=0, Total=6480 [2022-11-25 23:34:18,091 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 40 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:18,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 834 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:34:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-11-25 23:34:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 799. [2022-11-25 23:34:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 637 states have (on average 1.0298273155416013) internal successors, (656), 629 states have internal predecessors, (656), 92 states have call successors, (92), 56 states have call predecessors, (92), 68 states have return successors, (160), 113 states have call predecessors, (160), 91 states have call successors, (160) [2022-11-25 23:34:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 908 transitions. [2022-11-25 23:34:18,140 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 908 transitions. Word has length 403 [2022-11-25 23:34:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:18,141 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 908 transitions. [2022-11-25 23:34:18,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.6323529411764706) internal successors, (179), 69 states have internal predecessors, (179), 17 states have call successors, (19), 1 states have call predecessors, (19), 21 states have return successors, (46), 46 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-25 23:34:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 908 transitions. [2022-11-25 23:34:18,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2022-11-25 23:34:18,145 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:18,145 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 23, 22, 22, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 9, 8, 8, 1, 1, 1, 1] [2022-11-25 23:34:18,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:18,352 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:18,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:18,352 INFO L85 PathProgramCache]: Analyzing trace with hash -265550006, now seen corresponding path program 4 times [2022-11-25 23:34:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:18,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845960226] [2022-11-25 23:34:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 602 proven. 291 refuted. 0 times theorem prover too weak. 3577 trivial. 0 not checked. [2022-11-25 23:34:18,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845960226] [2022-11-25 23:34:18,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845960226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:18,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559640853] [2022-11-25 23:34:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:34:18,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:18,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:18,923 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:18,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-25 23:34:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:34:19,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 2687 proven. 178 refuted. 0 times theorem prover too weak. 1605 trivial. 0 not checked. [2022-11-25 23:34:19,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4470 backedges. 418 proven. 756 refuted. 0 times theorem prover too weak. 3296 trivial. 0 not checked. [2022-11-25 23:34:20,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559640853] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:20,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1427017945] [2022-11-25 23:34:20,711 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:20,711 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:20,711 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:20,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:20,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17] total 25 [2022-11-25 23:34:20,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686616913] [2022-11-25 23:34:20,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:20,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-25 23:34:20,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:20,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-25 23:34:20,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-11-25 23:34:20,717 INFO L87 Difference]: Start difference. First operand 799 states and 908 transitions. Second operand has 25 states, 24 states have (on average 6.625) internal successors, (159), 23 states have internal predecessors, (159), 14 states have call successors, (27), 4 states have call predecessors, (27), 10 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-25 23:34:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:21,215 INFO L93 Difference]: Finished difference Result 1484 states and 1693 transitions. [2022-11-25 23:34:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 23:34:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 6.625) internal successors, (159), 23 states have internal predecessors, (159), 14 states have call successors, (27), 4 states have call predecessors, (27), 10 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) Word has length 502 [2022-11-25 23:34:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:21,219 INFO L225 Difference]: With dead ends: 1484 [2022-11-25 23:34:21,220 INFO L226 Difference]: Without dead ends: 661 [2022-11-25 23:34:21,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 985 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 23:34:21,222 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 109 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:21,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 311 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:34:21,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-11-25 23:34:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 632. [2022-11-25 23:34:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 505 states have (on average 1.0316831683168317) internal successors, (521), 499 states have internal predecessors, (521), 75 states have call successors, (75), 53 states have call predecessors, (75), 51 states have return successors, (101), 79 states have call predecessors, (101), 74 states have call successors, (101) [2022-11-25 23:34:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 697 transitions. [2022-11-25 23:34:21,261 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 697 transitions. Word has length 502 [2022-11-25 23:34:21,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:21,262 INFO L495 AbstractCegarLoop]: Abstraction has 632 states and 697 transitions. [2022-11-25 23:34:21,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 6.625) internal successors, (159), 23 states have internal predecessors, (159), 14 states have call successors, (27), 4 states have call predecessors, (27), 10 states have return successors, (30), 15 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-25 23:34:21,262 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 697 transitions. [2022-11-25 23:34:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2022-11-25 23:34:21,268 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:21,268 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 28, 28, 24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 10, 9, 7, 4, 1, 1, 1] [2022-11-25 23:34:21,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:21,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-25 23:34:21,475 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:21,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:21,475 INFO L85 PathProgramCache]: Analyzing trace with hash -981325494, now seen corresponding path program 3 times [2022-11-25 23:34:21,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:21,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775635768] [2022-11-25 23:34:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:21,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5824 backedges. 757 proven. 257 refuted. 0 times theorem prover too weak. 4810 trivial. 0 not checked. [2022-11-25 23:34:21,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:21,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775635768] [2022-11-25 23:34:21,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775635768] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934221632] [2022-11-25 23:34:21,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:34:21,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:21,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:21,998 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:22,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-25 23:34:22,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:34:22,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:22,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 23:34:22,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5824 backedges. 896 proven. 1266 refuted. 0 times theorem prover too weak. 3662 trivial. 0 not checked. [2022-11-25 23:34:22,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5824 backedges. 900 proven. 1302 refuted. 0 times theorem prover too weak. 3622 trivial. 0 not checked. [2022-11-25 23:34:25,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934221632] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:25,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1792992681] [2022-11-25 23:34:25,381 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:25,381 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:25,381 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:25,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:25,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 18, 25] total 33 [2022-11-25 23:34:25,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701049574] [2022-11-25 23:34:25,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:25,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-25 23:34:25,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:25,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-25 23:34:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:34:25,386 INFO L87 Difference]: Start difference. First operand 632 states and 697 transitions. Second operand has 33 states, 32 states have (on average 6.125) internal successors, (196), 32 states have internal predecessors, (196), 26 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (40), 16 states have call predecessors, (40), 25 states have call successors, (40) [2022-11-25 23:34:26,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:26,448 INFO L93 Difference]: Finished difference Result 872 states and 968 transitions. [2022-11-25 23:34:26,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 23:34:26,448 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 6.125) internal successors, (196), 32 states have internal predecessors, (196), 26 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (40), 16 states have call predecessors, (40), 25 states have call successors, (40) Word has length 574 [2022-11-25 23:34:26,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:26,452 INFO L225 Difference]: With dead ends: 872 [2022-11-25 23:34:26,452 INFO L226 Difference]: Without dead ends: 639 [2022-11-25 23:34:26,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1181 GetRequests, 1117 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=414, Invalid=2448, Unknown=0, NotChecked=0, Total=2862 [2022-11-25 23:34:26,454 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 353 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:26,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 502 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 23:34:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-25 23:34:26,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 585. [2022-11-25 23:34:26,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 468 states have (on average 1.0277777777777777) internal successors, (481), 462 states have internal predecessors, (481), 70 states have call successors, (70), 50 states have call predecessors, (70), 46 states have return successors, (90), 72 states have call predecessors, (90), 69 states have call successors, (90) [2022-11-25 23:34:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 641 transitions. [2022-11-25 23:34:26,490 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 641 transitions. Word has length 574 [2022-11-25 23:34:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:26,491 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 641 transitions. [2022-11-25 23:34:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 6.125) internal successors, (196), 32 states have internal predecessors, (196), 26 states have call successors, (33), 2 states have call predecessors, (33), 14 states have return successors, (40), 16 states have call predecessors, (40), 25 states have call successors, (40) [2022-11-25 23:34:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 641 transitions. [2022-11-25 23:34:26,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 672 [2022-11-25 23:34:26,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:26,499 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 10, 8, 6, 1, 1, 1] [2022-11-25 23:34:26,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-25 23:34:26,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-25 23:34:26,705 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:26,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:26,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1259057346, now seen corresponding path program 4 times [2022-11-25 23:34:26,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:26,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905622867] [2022-11-25 23:34:26,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8005 backedges. 1134 proven. 460 refuted. 0 times theorem prover too weak. 6411 trivial. 0 not checked. [2022-11-25 23:34:27,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905622867] [2022-11-25 23:34:27,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905622867] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:27,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604212820] [2022-11-25 23:34:27,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 23:34:27,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:27,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:27,655 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:27,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-25 23:34:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:28,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 23:34:28,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8005 backedges. 1215 proven. 483 refuted. 0 times theorem prover too weak. 6307 trivial. 0 not checked. [2022-11-25 23:34:28,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8005 backedges. 1219 proven. 501 refuted. 0 times theorem prover too weak. 6285 trivial. 0 not checked. [2022-11-25 23:34:29,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604212820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:29,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1164095886] [2022-11-25 23:34:29,960 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:29,961 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:29,961 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:29,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:29,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 17] total 22 [2022-11-25 23:34:29,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909227466] [2022-11-25 23:34:29,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:29,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 23:34:29,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:29,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 23:34:29,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-11-25 23:34:29,965 INFO L87 Difference]: Start difference. First operand 585 states and 641 transitions. Second operand has 22 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-25 23:34:30,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:30,351 INFO L93 Difference]: Finished difference Result 615 states and 674 transitions. [2022-11-25 23:34:30,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-25 23:34:30,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) Word has length 671 [2022-11-25 23:34:30,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:30,355 INFO L225 Difference]: With dead ends: 615 [2022-11-25 23:34:30,355 INFO L226 Difference]: Without dead ends: 491 [2022-11-25 23:34:30,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1369 GetRequests, 1329 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=857, Unknown=0, NotChecked=0, Total=1056 [2022-11-25 23:34:30,357 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 68 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:30,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 323 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 23:34:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-11-25 23:34:30,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 466. [2022-11-25 23:34:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 372 states have (on average 1.0241935483870968) internal successors, (381), 368 states have internal predecessors, (381), 56 states have call successors, (56), 41 states have call predecessors, (56), 37 states have return successors, (65), 56 states have call predecessors, (65), 55 states have call successors, (65) [2022-11-25 23:34:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 502 transitions. [2022-11-25 23:34:30,385 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 502 transitions. Word has length 671 [2022-11-25 23:34:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:30,386 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 502 transitions. [2022-11-25 23:34:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 6.0) internal successors, (126), 21 states have internal predecessors, (126), 15 states have call successors, (22), 2 states have call predecessors, (22), 7 states have return successors, (24), 11 states have call predecessors, (24), 14 states have call successors, (24) [2022-11-25 23:34:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 502 transitions. [2022-11-25 23:34:30,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-11-25 23:34:30,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:30,392 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 32, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1] [2022-11-25 23:34:30,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-25 23:34:30,600 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:30,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1769921091, now seen corresponding path program 5 times [2022-11-25 23:34:30,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770261890] [2022-11-25 23:34:30,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:30,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:30,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 898 proven. 234 refuted. 0 times theorem prover too weak. 6396 trivial. 0 not checked. [2022-11-25 23:34:31,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:31,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770261890] [2022-11-25 23:34:31,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770261890] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:31,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807319521] [2022-11-25 23:34:31,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 23:34:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:31,275 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:31,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-25 23:34:31,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-25 23:34:31,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:31,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 23:34:31,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 1033 proven. 26 refuted. 0 times theorem prover too weak. 6469 trivial. 0 not checked. [2022-11-25 23:34:31,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 7528 backedges. 1033 proven. 26 refuted. 0 times theorem prover too weak. 6469 trivial. 0 not checked. [2022-11-25 23:34:32,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807319521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1033487582] [2022-11-25 23:34:32,980 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:32,980 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:32,980 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:32,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:32,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-11-25 23:34:32,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183467975] [2022-11-25 23:34:32,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:32,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-25 23:34:32,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:32,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-25 23:34:32,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-11-25 23:34:32,983 INFO L87 Difference]: Start difference. First operand 466 states and 502 transitions. Second operand has 20 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 11 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-25 23:34:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:34:33,550 INFO L93 Difference]: Finished difference Result 778 states and 852 transitions. [2022-11-25 23:34:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 23:34:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 11 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) Word has length 651 [2022-11-25 23:34:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:34:33,553 INFO L225 Difference]: With dead ends: 778 [2022-11-25 23:34:33,554 INFO L226 Difference]: Without dead ends: 486 [2022-11-25 23:34:33,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1291 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-11-25 23:34:33,555 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 148 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 23:34:33,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 272 Invalid, 854 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 23:34:33,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-25 23:34:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 450. [2022-11-25 23:34:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 360 states have (on average 1.0305555555555554) internal successors, (371), 355 states have internal predecessors, (371), 53 states have call successors, (53), 41 states have call predecessors, (53), 36 states have return successors, (60), 53 states have call predecessors, (60), 52 states have call successors, (60) [2022-11-25 23:34:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 484 transitions. [2022-11-25 23:34:33,583 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 484 transitions. Word has length 651 [2022-11-25 23:34:33,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:34:33,584 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 484 transitions. [2022-11-25 23:34:33,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 11 states have call successors, (18), 2 states have call predecessors, (18), 8 states have return successors, (20), 10 states have call predecessors, (20), 10 states have call successors, (20) [2022-11-25 23:34:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 484 transitions. [2022-11-25 23:34:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2022-11-25 23:34:33,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 23:34:33,590 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 32, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1] [2022-11-25 23:34:33,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-25 23:34:33,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-25 23:34:33,797 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2022-11-25 23:34:33,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 23:34:33,797 INFO L85 PathProgramCache]: Analyzing trace with hash -269713044, now seen corresponding path program 6 times [2022-11-25 23:34:33,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-25 23:34:33,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162282475] [2022-11-25 23:34:33,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 23:34:33,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 23:34:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 23:34:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1257 proven. 1900 refuted. 0 times theorem prover too weak. 4397 trivial. 0 not checked. [2022-11-25 23:34:40,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-25 23:34:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162282475] [2022-11-25 23:34:40,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162282475] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 23:34:40,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476158606] [2022-11-25 23:34:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 23:34:40,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 23:34:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 [2022-11-25 23:34:40,846 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 23:34:40,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-25 23:34:41,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 23:34:41,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 23:34:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1231 conjuncts, 133 conjunts are in the unsatisfiable core [2022-11-25 23:34:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 23:34:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1237 proven. 1440 refuted. 0 times theorem prover too weak. 4877 trivial. 0 not checked. [2022-11-25 23:34:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 23:34:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7554 backedges. 1543 proven. 1316 refuted. 0 times theorem prover too weak. 4695 trivial. 0 not checked. [2022-11-25 23:34:59,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476158606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 23:34:59,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1261041519] [2022-11-25 23:34:59,607 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-25 23:34:59,607 INFO L166 IcfgInterpreter]: Building call graph [2022-11-25 23:34:59,608 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-25 23:34:59,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 23:34:59,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 36, 46] total 79 [2022-11-25 23:34:59,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359545360] [2022-11-25 23:34:59,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 23:34:59,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-11-25 23:34:59,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-25 23:34:59,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-11-25 23:34:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=5582, Unknown=0, NotChecked=0, Total=6320 [2022-11-25 23:34:59,613 INFO L87 Difference]: Start difference. First operand 450 states and 484 transitions. Second operand has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-25 23:35:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 23:35:00,002 INFO L93 Difference]: Finished difference Result 484 states and 521 transitions. [2022-11-25 23:35:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-25 23:35:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) Word has length 652 [2022-11-25 23:35:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 23:35:00,004 INFO L225 Difference]: With dead ends: 484 [2022-11-25 23:35:00,004 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 23:35:00,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1440 GetRequests, 1265 SyntacticMatches, 92 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9769 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=855, Invalid=6285, Unknown=0, NotChecked=0, Total=7140 [2022-11-25 23:35:00,007 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 736 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 23:35:00,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 736 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 23:35:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 23:35:00,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 23:35:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 23:35:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 23:35:00,008 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 652 [2022-11-25 23:35:00,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 23:35:00,009 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 23:35:00,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.607594936708861) internal successors, (206), 80 states have internal predecessors, (206), 20 states have call successors, (22), 1 states have call predecessors, (22), 24 states have return successors, (54), 54 states have call predecessors, (54), 20 states have call successors, (54) [2022-11-25 23:35:00,009 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 23:35:00,009 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 23:35:00,012 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 12 remaining) [2022-11-25 23:35:00,012 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 12 remaining) [2022-11-25 23:35:00,013 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 12 remaining) [2022-11-25 23:35:00,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 12 remaining) [2022-11-25 23:35:00,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 12 remaining) [2022-11-25 23:35:00,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 12 remaining) [2022-11-25 23:35:00,014 INFO L805 garLoopResultBuilder]: Registering result SAFE for location fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 12 remaining) [2022-11-25 23:35:00,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-25 23:35:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-25 23:35:00,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 23:35:31,879 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 23:35:31,880 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 23:35:31,880 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (and (<= 8 |ULTIMATE.start_main_~x~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 8)) [2022-11-25 23:35:31,880 INFO L902 garLoopResultBuilder]: At program point L39-1(line 39) the Hoare annotation is: true [2022-11-25 23:35:31,880 INFO L902 garLoopResultBuilder]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2022-11-25 23:35:31,880 INFO L899 garLoopResultBuilder]: For program point fibo2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,880 INFO L899 garLoopResultBuilder]: For program point L25(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,880 INFO L899 garLoopResultBuilder]: For program point fibo2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,880 INFO L899 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,881 INFO L895 garLoopResultBuilder]: At program point L25-2(line 25) the Hoare annotation is: (and (or (and (<= |fibo2_#in~n| fibo2_~n) (<= fibo2_~n |fibo2_#in~n|)) (not (<= |fibo2_#in~n| 7))) (not (<= |fibo2_#in~n| 2))) [2022-11-25 23:35:31,881 INFO L899 garLoopResultBuilder]: For program point L25-3(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,881 INFO L899 garLoopResultBuilder]: For program point L25-4(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,881 INFO L899 garLoopResultBuilder]: For program point L25-5(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L895 garLoopResultBuilder]: At program point L25-6(line 25) the Hoare annotation is: (let ((.cse0 (not (<= |fibo2_#in~n| 7))) (.cse1 (<= |fibo2_#in~n| fibo2_~n)) (.cse2 (<= fibo2_~n |fibo2_#in~n|))) (and (or .cse0 (<= 8 |fibo2_#t~ret6|) (not (<= 7 |fibo2_#in~n|))) (or (and (<= 4 |fibo2_#in~n|) .cse1 (<= |fibo2_#t~ret6| 2) (<= 2 |fibo2_#t~ret6|)) (and (<= |fibo2_#in~n| 3) (= |fibo2_#t~ret6| 1) .cse1 (<= 3 |fibo2_#in~n|) .cse2) (not (<= |fibo2_#in~n| 4))) (or (not (<= |fibo2_#in~n| 5)) (<= fibo2_~n 4)) (or .cse0 (not (<= 5 |fibo2_#in~n|)) (and (<= 3 |fibo2_#t~ret6|) (<= |fibo2_#t~ret6| 8) .cse1 .cse2)))) [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point L25-7(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point L25-8(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point L25-9(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point fibo2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point fibo2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,882 INFO L899 garLoopResultBuilder]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point fibo2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 26) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point fibo2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2022-11-25 23:35:31,883 INFO L899 garLoopResultBuilder]: For program point fibo1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,884 INFO L899 garLoopResultBuilder]: For program point fibo1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,884 INFO L899 garLoopResultBuilder]: For program point L15(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,884 INFO L899 garLoopResultBuilder]: For program point L15-1(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,884 INFO L895 garLoopResultBuilder]: At program point L15-2(line 15) the Hoare annotation is: (let ((.cse0 (and (<= fibo1_~n |fibo1_#in~n|) (<= |fibo1_#in~n| fibo1_~n)))) (and (or .cse0 (not (<= |fibo1_#in~n| 6))) (or .cse0 (not (<= |fibo1_#in~n| 8)) (not (<= 8 |fibo1_#in~n|))) (not (<= |fibo1_#in~n| 1)))) [2022-11-25 23:35:31,884 INFO L899 garLoopResultBuilder]: For program point L15-3(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,884 INFO L899 garLoopResultBuilder]: For program point L15-4(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,885 INFO L899 garLoopResultBuilder]: For program point fibo1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,885 INFO L899 garLoopResultBuilder]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2022-11-25 23:35:31,885 INFO L899 garLoopResultBuilder]: For program point L15-5(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,885 INFO L895 garLoopResultBuilder]: At program point L15-6(line 15) the Hoare annotation is: (let ((.cse2 (<= |fibo1_#in~n| fibo1_~n)) (.cse0 (<= fibo1_~n |fibo1_#in~n|)) (.cse1 (<= 5 |fibo1_#t~ret4|))) (and (or (not (<= |fibo1_#in~n| 8)) (not (<= 8 |fibo1_#in~n|)) (and .cse0 .cse1 .cse2 (<= |fibo1_#t~ret4| 13))) (or (and .cse0 (= |fibo1_#t~ret4| 1) (< 1 fibo1_~n) (<= |fibo1_#in~n| 2)) (not (<= |fibo1_#in~n| 3))) (or (not (<= 4 |fibo1_#in~n|)) (and .cse0 (<= |fibo1_#in~n| 4) .cse2 (<= 2 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 2)) (and .cse0 (<= 3 |fibo1_#t~ret4|) (<= |fibo1_#t~ret4| 3) (<= 5 fibo1_~n)) (not (<= |fibo1_#in~n| 5))) (or (and .cse0 (<= |fibo1_#t~ret4| 5) .cse1 (<= 6 fibo1_~n)) (not (<= 6 |fibo1_#in~n|)) (not (<= |fibo1_#in~n| 6))))) [2022-11-25 23:35:31,885 INFO L899 garLoopResultBuilder]: For program point L15-7(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point L15-8(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point L15-9(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point fibo1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L902 garLoopResultBuilder]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point fibo1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point fibo1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2022-11-25 23:35:31,886 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 16) no Hoare annotation was computed. [2022-11-25 23:35:31,887 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 16) no Hoare annotation was computed. [2022-11-25 23:35:31,887 INFO L899 garLoopResultBuilder]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2022-11-25 23:35:31,890 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 23:35:31,892 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 23:35:31,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 11:35:31 BoogieIcfgContainer [2022-11-25 23:35:31,902 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 23:35:31,903 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 23:35:31,903 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 23:35:31,903 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 23:35:31,904 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 11:32:51" (3/4) ... [2022-11-25 23:35:31,907 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 23:35:31,913 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2022-11-25 23:35:31,914 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2022-11-25 23:35:31,920 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-25 23:35:31,921 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-25 23:35:31,921 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-25 23:35:31,921 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 23:35:31,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/witness.graphml [2022-11-25 23:35:31,961 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 23:35:31,961 INFO L158 Benchmark]: Toolchain (without parser) took 161188.33ms. Allocated memory was 138.4MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 84.6MB in the beginning and 625.3MB in the end (delta: -540.8MB). Peak memory consumption was 598.6MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,961 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory was 102.8MB in the beginning and 102.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:35:31,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.00ms. Allocated memory is still 138.4MB. Free memory was 84.3MB in the beginning and 74.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,962 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.60ms. Allocated memory is still 138.4MB. Free memory was 74.3MB in the beginning and 73.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 23:35:31,962 INFO L158 Benchmark]: Boogie Preprocessor took 17.83ms. Allocated memory is still 138.4MB. Free memory was 73.0MB in the beginning and 71.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,962 INFO L158 Benchmark]: RCFGBuilder took 364.87ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 71.7MB in the beginning and 127.8MB in the end (delta: -56.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,963 INFO L158 Benchmark]: TraceAbstraction took 160494.10ms. Allocated memory was 167.8MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 127.3MB in the beginning and 628.5MB in the end (delta: -501.2MB). Peak memory consumption was 787.1MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,963 INFO L158 Benchmark]: Witness Printer took 57.87ms. Allocated memory is still 1.3GB. Free memory was 628.5MB in the beginning and 625.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 23:35:31,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 138.4MB. Free memory was 102.8MB in the beginning and 102.7MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.00ms. Allocated memory is still 138.4MB. Free memory was 84.3MB in the beginning and 74.3MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.60ms. Allocated memory is still 138.4MB. Free memory was 74.3MB in the beginning and 73.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 17.83ms. Allocated memory is still 138.4MB. Free memory was 73.0MB in the beginning and 71.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 364.87ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 71.7MB in the beginning and 127.8MB in the end (delta: -56.2MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * TraceAbstraction took 160494.10ms. Allocated memory was 167.8MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 127.3MB in the beginning and 628.5MB in the end (delta: -501.2MB). Peak memory consumption was 787.1MB. Max. memory is 16.1GB. * Witness Printer took 57.87ms. Allocated memory is still 1.3GB. Free memory was 628.5MB in the beginning and 625.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 160.4s, OverallIterations: 47, TraceHistogramMax: 35, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.1s, AutomataDifference: 28.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 31.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6477 SdHoareTripleChecker+Valid, 16.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6332 mSDsluCounter, 17029 SdHoareTripleChecker+Invalid, 13.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15012 mSDsCounter, 3073 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28060 IncrementalHoareTripleChecker+Invalid, 31133 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3073 mSolverCounterUnsat, 2017 mSDtfsCounter, 28060 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17989 GetRequests, 16064 SyntacticMatches, 427 SemanticMatches, 1498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36633 ImplicationChecksByTransitivity, 23.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1226occurred in iteration=32, InterpolantAutomatonStates: 1057, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.8s AutomataMinimizationTime, 47 MinimizatonAttempts, 3203 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 4394 PreInvPairs, 8284 NumberOfFragments, 238 HoareAnnotationTreeSize, 4394 FomulaSimplifications, 459258 FormulaSimplificationTreeSizeReduction, 27.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 139981 FormulaSimplificationTreeSizeReductionInter, 4.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 83.3s InterpolantComputationTime, 17532 NumberOfCodeBlocks, 15704 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 25422 ConstructedInterpolants, 0 QuantifiedInterpolants, 44239 SizeOfPredicates, 151 NumberOfNonLiveVariables, 13531 ConjunctsInSsa, 747 ConjunctsInUnsatCore, 114 InterpolantComputations, 17 PerfectInterpolantSequences, 151897/173480 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! [2022-11-25 23:35:31,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bc72b5c-e510-415b-ab30-c76247b0980a/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE