./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/recHanoi01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/recHanoi01.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P --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 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:26:34,530 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:26:34,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:26:34,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:26:34,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:26:34,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:26:34,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:26:34,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:26:34,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:26:34,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:26:34,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:26:34,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:26:34,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:26:34,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:26:34,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:26:34,622 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:26:34,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:26:34,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:26:34,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:26:34,639 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:26:34,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:26:34,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:26:34,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:26:34,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:26:34,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:26:34,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:26:34,662 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:26:34,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:26:34,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:26:34,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:26:34,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:26:34,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:26:34,672 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:26:34,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:26:34,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:26:34,676 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:26:34,677 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:26:34,677 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:26:34,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:26:34,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:26:34,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:26:34,681 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-11-21 01:26:34,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:26:34,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:26:34,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:26:34,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:26:34,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:26:34,751 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:26:34,751 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:26:34,752 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:26:34,752 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:26:34,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:26:34,752 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:26:34,752 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:26:34,752 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:26:34,753 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:26:34,753 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:26:34,753 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:26:34,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:26:34,753 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:26:34,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:26:34,754 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:26:34,754 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:26:34,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:26:34,756 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-21 01:26:34,756 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:26:34,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:26:34,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:26:34,761 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:26:34,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:26:34,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:26:34,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:34,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:26:34,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:26:34,765 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:26:34,765 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:26:34,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:26:34,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:26:34,766 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:26:34,767 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:26:34,767 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b02fad28964214b0cd332ac12fce3136c6c5e9247130ab67f1c2c3baea22f9 [2021-11-21 01:26:35,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:26:35,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:26:35,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:26:35,209 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:26:35,210 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:26:35,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/recursive/recHanoi01.c [2021-11-21 01:26:35,292 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/data/94207f486/44164399660548a8917890091771da99/FLAG484e1dc7a [2021-11-21 01:26:35,839 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:26:35,840 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/sv-benchmarks/c/recursive/recHanoi01.c [2021-11-21 01:26:35,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/data/94207f486/44164399660548a8917890091771da99/FLAG484e1dc7a [2021-11-21 01:26:36,186 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/data/94207f486/44164399660548a8917890091771da99 [2021-11-21 01:26:36,189 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:26:36,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:26:36,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:36,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:26:36,202 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:26:36,203 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a640329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36, skipping insertion in model container [2021-11-21 01:26:36,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:26:36,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:26:36,471 WARN L230 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_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2021-11-21 01:26:36,472 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:36,483 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:26:36,499 WARN L230 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_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/sv-benchmarks/c/recursive/recHanoi01.c[1213,1226] [2021-11-21 01:26:36,500 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:26:36,515 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:26:36,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36 WrapperNode [2021-11-21 01:26:36,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:26:36,517 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:36,517 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:26:36,517 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:26:36,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,556 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-11-21 01:26:36,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:26:36,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:26:36,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:26:36,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:26:36,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,575 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,579 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:26:36,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:26:36,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:26:36,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:26:36,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (1/1) ... [2021-11-21 01:26:36,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:26:36,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:36,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:26:36,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:26:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:26:36,666 INFO L130 BoogieDeclarations]: Found specification of procedure applyHanoi [2021-11-21 01:26:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure applyHanoi [2021-11-21 01:26:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-21 01:26:36,667 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-21 01:26:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:26:36,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:26:36,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:26:36,743 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:26:36,745 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:26:36,931 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:26:36,979 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:26:36,979 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:26:36,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:36 BoogieIcfgContainer [2021-11-21 01:26:36,982 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:26:36,984 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:26:36,984 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:26:36,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:26:36,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:26:36" (1/3) ... [2021-11-21 01:26:36,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e476b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:36, skipping insertion in model container [2021-11-21 01:26:36,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:26:36" (2/3) ... [2021-11-21 01:26:36,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e476b62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:26:36, skipping insertion in model container [2021-11-21 01:26:36,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:26:36" (3/3) ... [2021-11-21 01:26:37,001 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi01.c [2021-11-21 01:26:37,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:26:37,008 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2021-11-21 01:26:37,105 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:26:37,119 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 01:26:37,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2021-11-21 01:26:37,143 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 36 states have internal predecessors, (38), 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) [2021-11-21 01:26:37,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:26:37,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:37,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:26:37,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:37,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:37,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1329392281, now seen corresponding path program 1 times [2021-11-21 01:26:37,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:37,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562068305] [2021-11-21 01:26:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:37,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:37,462 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:37,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562068305] [2021-11-21 01:26:37,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562068305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:37,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:37,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:26:37,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689932773] [2021-11-21 01:26:37,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:37,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:37,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:37,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:37,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:37,530 INFO L87 Difference]: Start difference. First operand has 43 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 36 states have internal predecessors, (38), 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 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-21 01:26:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:37,679 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-21 01:26:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:37,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 [2021-11-21 01:26:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:37,696 INFO L225 Difference]: With dead ends: 73 [2021-11-21 01:26:37,696 INFO L226 Difference]: Without dead ends: 65 [2021-11-21 01:26:37,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:37,710 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 30 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:37,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 126 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:37,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-21 01:26:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-11-21 01:26:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 39 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 01:26:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-11-21 01:26:37,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 6 [2021-11-21 01:26:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-11-21 01:26:37,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2021-11-21 01:26:37,795 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-11-21 01:26:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:26:37,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:37,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:37,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:26:37,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:37,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1940693911, now seen corresponding path program 1 times [2021-11-21 01:26:37,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:37,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132174617] [2021-11-21 01:26:37,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:37,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:37,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:37,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132174617] [2021-11-21 01:26:37,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132174617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:37,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:37,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:26:37,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393190429] [2021-11-21 01:26:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:37,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:37,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:37,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:37,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:37,965 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-21 01:26:38,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:38,095 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-11-21 01:26:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2021-11-21 01:26:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:38,102 INFO L225 Difference]: With dead ends: 46 [2021-11-21 01:26:38,104 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 01:26:38,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:38,109 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:38,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 98 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 01:26:38,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-21 01:26:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.5) internal successors, (39), 37 states have internal predecessors, (39), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-21 01:26:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2021-11-21 01:26:38,137 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 8 [2021-11-21 01:26:38,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:38,140 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2021-11-21 01:26:38,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-11-21 01:26:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2021-11-21 01:26:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:26:38,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:38,143 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:38,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:26:38,144 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting applyHanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:38,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -31969055, now seen corresponding path program 1 times [2021-11-21 01:26:38,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:38,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618565544] [2021-11-21 01:26:38,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:38,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,277 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:38,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618565544] [2021-11-21 01:26:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618565544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:38,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:38,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:26:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645294619] [2021-11-21 01:26:38,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:38,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:38,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:38,281 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:26:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:38,371 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-11-21 01:26:38,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:38,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-11-21 01:26:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:38,373 INFO L225 Difference]: With dead ends: 73 [2021-11-21 01:26:38,374 INFO L226 Difference]: Without dead ends: 50 [2021-11-21 01:26:38,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:38,377 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:38,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 136 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:38,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-21 01:26:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-11-21 01:26:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.4) internal successors, (42), 41 states have internal predecessors, (42), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-21 01:26:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-11-21 01:26:38,391 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 9 [2021-11-21 01:26:38,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:38,392 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-11-21 01:26:38,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-21 01:26:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-11-21 01:26:38,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:26:38,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:38,394 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:38,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:26:38,395 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:38,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash -485709050, now seen corresponding path program 1 times [2021-11-21 01:26:38,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:38,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989076149] [2021-11-21 01:26:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:38,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989076149] [2021-11-21 01:26:38,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989076149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:38,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798768466] [2021-11-21 01:26:38,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:38,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:38,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:38,484 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:26:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:38,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 01:26:38,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:38,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798768466] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:38,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423782534] [2021-11-21 01:26:38,991 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:26:38,991 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:38,998 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:39,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:39,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-11-21 01:26:39,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746106326] [2021-11-21 01:26:39,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:39,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:26:39,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:26:39,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:39,014 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:39,335 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-11-21 01:26:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 01:26:39,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 01:26:39,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:39,344 INFO L225 Difference]: With dead ends: 160 [2021-11-21 01:26:39,344 INFO L226 Difference]: Without dead ends: 159 [2021-11-21 01:26:39,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:26:39,349 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 141 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:39,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 378 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-21 01:26:39,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 88. [2021-11-21 01:26:39,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 71 states have internal predecessors, (79), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2021-11-21 01:26:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2021-11-21 01:26:39,396 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 13 [2021-11-21 01:26:39,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:39,396 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2021-11-21 01:26:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2021-11-21 01:26:39,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:26:39,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:39,398 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:39,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:39,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:39,613 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash 2122888672, now seen corresponding path program 1 times [2021-11-21 01:26:39,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:39,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502978809] [2021-11-21 01:26:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:39,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:39,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502978809] [2021-11-21 01:26:39,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502978809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:39,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319896282] [2021-11-21 01:26:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:39,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:39,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:39,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:26:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:26:39,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:39,915 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319896282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:39,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-21 01:26:39,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114059428] [2021-11-21 01:26:39,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:39,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:39,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:39,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:39,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:39,919 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-21 01:26:39,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:39,963 INFO L93 Difference]: Finished difference Result 88 states and 121 transitions. [2021-11-21 01:26:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:39,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 14 [2021-11-21 01:26:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:39,970 INFO L225 Difference]: With dead ends: 88 [2021-11-21 01:26:39,970 INFO L226 Difference]: Without dead ends: 87 [2021-11-21 01:26:39,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 01:26:39,972 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:39,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:39,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-21 01:26:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-11-21 01:26:40,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 58 states have (on average 1.3103448275862069) internal successors, (76), 70 states have internal predecessors, (76), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (28), 13 states have call predecessors, (28), 13 states have call successors, (28) [2021-11-21 01:26:40,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 118 transitions. [2021-11-21 01:26:40,010 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 118 transitions. Word has length 14 [2021-11-21 01:26:40,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:40,010 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 118 transitions. [2021-11-21 01:26:40,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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) [2021-11-21 01:26:40,011 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 118 transitions. [2021-11-21 01:26:40,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 01:26:40,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:40,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:40,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:40,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:40,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting applyHanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:40,214 INFO L85 PathProgramCache]: Analyzing trace with hash -13450526, now seen corresponding path program 1 times [2021-11-21 01:26:40,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:40,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140250875] [2021-11-21 01:26:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:40,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:40,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140250875] [2021-11-21 01:26:40,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140250875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:40,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696458612] [2021-11-21 01:26:40,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:40,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:40,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:40,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:40,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:26:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:40,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:26:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:40,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:40,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:40,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696458612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:40,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627313921] [2021-11-21 01:26:40,543 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:26:40,543 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:40,543 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:40,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:40,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:26:40,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600115928] [2021-11-21 01:26:40,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:40,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:26:40,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:40,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:26:40,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:40,548 INFO L87 Difference]: Start difference. First operand 87 states and 118 transitions. Second operand has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:40,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:40,691 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-21 01:26:40,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:26:40,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-21 01:26:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:40,696 INFO L225 Difference]: With dead ends: 93 [2021-11-21 01:26:40,696 INFO L226 Difference]: Without dead ends: 91 [2021-11-21 01:26:40,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:26:40,699 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:40,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 130 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-21 01:26:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-21 01:26:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 71 states have internal predecessors, (73), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-21 01:26:40,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-11-21 01:26:40,741 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 16 [2021-11-21 01:26:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-11-21 01:26:40,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-11-21 01:26:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-21 01:26:40,745 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:40,745 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:40,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-21 01:26:40,969 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -160663387, now seen corresponding path program 1 times [2021-11-21 01:26:40,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183863103] [2021-11-21 01:26:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:40,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:26:41,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183863103] [2021-11-21 01:26:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183863103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117922607] [2021-11-21 01:26:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:41,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:41,053 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:41,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:26:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-21 01:26:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:26:41,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117922607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:41,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:41,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-11-21 01:26:41,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629108124] [2021-11-21 01:26:41,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:41,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:41,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:41,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:41,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-21 01:26:41,212 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:26:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:41,252 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2021-11-21 01:26:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 01:26:41,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-21 01:26:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:41,256 INFO L225 Difference]: With dead ends: 91 [2021-11-21 01:26:41,256 INFO L226 Difference]: Without dead ends: 90 [2021-11-21 01:26:41,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:41,258 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:41,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 94 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-21 01:26:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-21 01:26:41,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.180327868852459) internal successors, (72), 70 states have internal predecessors, (72), 14 states have call successors, (14), 6 states have call predecessors, (14), 9 states have return successors, (31), 13 states have call predecessors, (31), 13 states have call successors, (31) [2021-11-21 01:26:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2021-11-21 01:26:41,289 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 27 [2021-11-21 01:26:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:41,290 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2021-11-21 01:26:41,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:26:41,290 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2021-11-21 01:26:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-21 01:26:41,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:41,293 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:41,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:41,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:26:41,509 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:41,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:41,509 INFO L85 PathProgramCache]: Analyzing trace with hash -685597643, now seen corresponding path program 1 times [2021-11-21 01:26:41,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118639106] [2021-11-21 01:26:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:26:41,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:41,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118639106] [2021-11-21 01:26:41,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118639106] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:41,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:41,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:26:41,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370769793] [2021-11-21 01:26:41,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:41,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 01:26:41,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:41,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 01:26:41,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:26:41,570 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:26:41,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:41,621 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2021-11-21 01:26:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-11-21 01:26:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:41,626 INFO L225 Difference]: With dead ends: 109 [2021-11-21 01:26:41,626 INFO L226 Difference]: Without dead ends: 106 [2021-11-21 01:26:41,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-21 01:26:41,628 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:41,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 127 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:41,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-21 01:26:41,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-21 01:26:41,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 70 states have (on average 1.2) internal successors, (84), 78 states have internal predecessors, (84), 15 states have call successors, (15), 7 states have call predecessors, (15), 9 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-21 01:26:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 131 transitions. [2021-11-21 01:26:41,657 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 131 transitions. Word has length 28 [2021-11-21 01:26:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:41,658 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 131 transitions. [2021-11-21 01:26:41,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-21 01:26:41,658 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 131 transitions. [2021-11-21 01:26:41,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-21 01:26:41,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:41,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:41,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 01:26:41,671 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:41,673 INFO L85 PathProgramCache]: Analyzing trace with hash -505282032, now seen corresponding path program 1 times [2021-11-21 01:26:41,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:41,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977673378] [2021-11-21 01:26:41,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:26:41,791 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977673378] [2021-11-21 01:26:41,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977673378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:41,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884355608] [2021-11-21 01:26:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:41,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:41,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:41,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:41,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:26:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:41,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:26:41,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:26:41,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-21 01:26:42,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884355608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:42,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [277158310] [2021-11-21 01:26:42,153 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 01:26:42,154 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:42,154 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:42,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-11-21 01:26:42,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751201094] [2021-11-21 01:26:42,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:42,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:26:42,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:26:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:26:42,159 INFO L87 Difference]: Start difference. First operand 100 states and 131 transitions. Second operand has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:26:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:42,348 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-11-21 01:26:42,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 01:26:42,349 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2021-11-21 01:26:42,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:42,351 INFO L225 Difference]: With dead ends: 161 [2021-11-21 01:26:42,352 INFO L226 Difference]: Without dead ends: 160 [2021-11-21 01:26:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:26:42,353 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 154 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:42,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 265 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:42,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-21 01:26:42,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 136. [2021-11-21 01:26:42,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.29) internal successors, (129), 108 states have internal predecessors, (129), 18 states have call successors, (18), 10 states have call predecessors, (18), 12 states have return successors, (35), 17 states have call predecessors, (35), 17 states have call successors, (35) [2021-11-21 01:26:42,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 182 transitions. [2021-11-21 01:26:42,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 182 transitions. Word has length 33 [2021-11-21 01:26:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:42,369 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 182 transitions. [2021-11-21 01:26:42,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 5 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-21 01:26:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 182 transitions. [2021-11-21 01:26:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-21 01:26:42,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:42,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2021-11-21 01:26:42,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:42,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:42,585 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash -79127641, now seen corresponding path program 2 times [2021-11-21 01:26:42,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:42,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852942125] [2021-11-21 01:26:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:42,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:42,738 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852942125] [2021-11-21 01:26:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852942125] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569957986] [2021-11-21 01:26:42,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:26:42,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:42,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:42,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:42,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:26:42,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-21 01:26:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-21 01:26:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:43,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:43,293 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:43,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569957986] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:43,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2129670571] [2021-11-21 01:26:43,301 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:26:43,302 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:43,302 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:43,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:43,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2021-11-21 01:26:43,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990678052] [2021-11-21 01:26:43,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:43,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:26:43,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:43,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:26:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:26:43,309 INFO L87 Difference]: Start difference. First operand 136 states and 182 transitions. Second operand has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:43,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:43,962 INFO L93 Difference]: Finished difference Result 834 states and 1188 transitions. [2021-11-21 01:26:43,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 01:26:43,963 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-21 01:26:43,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:43,973 INFO L225 Difference]: With dead ends: 834 [2021-11-21 01:26:43,973 INFO L226 Difference]: Without dead ends: 833 [2021-11-21 01:26:43,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:26:43,976 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 582 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:43,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 466 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:43,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2021-11-21 01:26:44,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 238. [2021-11-21 01:26:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 172 states have (on average 1.2034883720930232) internal successors, (207), 186 states have internal predecessors, (207), 36 states have call successors, (36), 16 states have call predecessors, (36), 24 states have return successors, (164), 35 states have call predecessors, (164), 35 states have call successors, (164) [2021-11-21 01:26:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 407 transitions. [2021-11-21 01:26:44,024 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 407 transitions. Word has length 34 [2021-11-21 01:26:44,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:44,024 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 407 transitions. [2021-11-21 01:26:44,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 24 states have internal predecessors, (62), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:44,025 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 407 transitions. [2021-11-21 01:26:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-21 01:26:44,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:44,026 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-11-21 01:26:44,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:44,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:26:44,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:44,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:44,241 INFO L85 PathProgramCache]: Analyzing trace with hash -245226102, now seen corresponding path program 1 times [2021-11-21 01:26:44,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:44,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497709356] [2021-11-21 01:26:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:44,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:44,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-21 01:26:44,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497709356] [2021-11-21 01:26:44,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497709356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:44,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:26:44,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:26:44,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310285648] [2021-11-21 01:26:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:26:44,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:26:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:44,297 INFO L87 Difference]: Start difference. First operand 238 states and 407 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:26:44,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:44,349 INFO L93 Difference]: Finished difference Result 275 states and 460 transitions. [2021-11-21 01:26:44,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:26:44,349 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-11-21 01:26:44,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:44,354 INFO L225 Difference]: With dead ends: 275 [2021-11-21 01:26:44,355 INFO L226 Difference]: Without dead ends: 264 [2021-11-21 01:26:44,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:26:44,357 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:44,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 91 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:44,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-21 01:26:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-11-21 01:26:44,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 195 states have (on average 1.1743589743589744) internal successors, (229), 208 states have internal predecessors, (229), 36 states have call successors, (36), 16 states have call predecessors, (36), 27 states have return successors, (168), 39 states have call predecessors, (168), 35 states have call successors, (168) [2021-11-21 01:26:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 433 transitions. [2021-11-21 01:26:44,414 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 433 transitions. Word has length 35 [2021-11-21 01:26:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:44,417 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 433 transitions. [2021-11-21 01:26:44,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-21 01:26:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 433 transitions. [2021-11-21 01:26:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-21 01:26:44,422 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:44,422 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:44,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 01:26:44,423 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:44,424 INFO L85 PathProgramCache]: Analyzing trace with hash -880024075, now seen corresponding path program 2 times [2021-11-21 01:26:44,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:44,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32208470] [2021-11-21 01:26:44,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:44,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 4 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-21 01:26:44,661 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32208470] [2021-11-21 01:26:44,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32208470] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:44,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206652430] [2021-11-21 01:26:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:26:44,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:44,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:44,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:26:44,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:26:44,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:44,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-21 01:26:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-21 01:26:44,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-21 01:26:45,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206652430] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:45,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081226461] [2021-11-21 01:26:45,279 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 01:26:45,279 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:45,280 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:45,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:45,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 24 [2021-11-21 01:26:45,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217442884] [2021-11-21 01:26:45,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:45,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-21 01:26:45,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-21 01:26:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-11-21 01:26:45,285 INFO L87 Difference]: Start difference. First operand 264 states and 433 transitions. Second operand has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:26:45,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:45,798 INFO L93 Difference]: Finished difference Result 610 states and 1109 transitions. [2021-11-21 01:26:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-21 01:26:45,799 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2021-11-21 01:26:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:45,803 INFO L225 Difference]: With dead ends: 610 [2021-11-21 01:26:45,804 INFO L226 Difference]: Without dead ends: 354 [2021-11-21 01:26:45,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=1100, Unknown=0, NotChecked=0, Total=1332 [2021-11-21 01:26:45,811 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:45,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 373 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:26:45,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-21 01:26:45,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 332. [2021-11-21 01:26:45,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 248 states have (on average 1.153225806451613) internal successors, (286), 251 states have internal predecessors, (286), 44 states have call successors, (44), 26 states have call predecessors, (44), 34 states have return successors, (196), 54 states have call predecessors, (196), 43 states have call successors, (196) [2021-11-21 01:26:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 526 transitions. [2021-11-21 01:26:45,855 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 526 transitions. Word has length 48 [2021-11-21 01:26:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:45,856 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 526 transitions. [2021-11-21 01:26:45,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.909090909090909) internal successors, (64), 16 states have internal predecessors, (64), 12 states have call successors, (14), 8 states have call predecessors, (14), 5 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-21 01:26:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 526 transitions. [2021-11-21 01:26:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-21 01:26:45,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:45,860 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:45,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 01:26:46,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:46,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:46,081 INFO L85 PathProgramCache]: Analyzing trace with hash 888955120, now seen corresponding path program 1 times [2021-11-21 01:26:46,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:46,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195918416] [2021-11-21 01:26:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:46,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-21 01:26:46,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195918416] [2021-11-21 01:26:46,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195918416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062567653] [2021-11-21 01:26:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:46,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:46,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:46,153 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:46,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:26:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-21 01:26:46,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-21 01:26:46,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-21 01:26:47,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062567653] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2113916372] [2021-11-21 01:26:47,366 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:26:47,366 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:47,367 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:47,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:47,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 15] total 21 [2021-11-21 01:26:47,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320318535] [2021-11-21 01:26:47,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:47,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 01:26:47,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 01:26:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:26:47,371 INFO L87 Difference]: Start difference. First operand 332 states and 526 transitions. Second operand has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-21 01:26:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:47,962 INFO L93 Difference]: Finished difference Result 540 states and 917 transitions. [2021-11-21 01:26:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 01:26:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) Word has length 79 [2021-11-21 01:26:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:47,970 INFO L225 Difference]: With dead ends: 540 [2021-11-21 01:26:47,970 INFO L226 Difference]: Without dead ends: 453 [2021-11-21 01:26:47,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=933, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 01:26:47,973 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 142 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:47,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 137 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 01:26:47,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-11-21 01:26:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 431. [2021-11-21 01:26:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 323 states have (on average 1.1393188854489165) internal successors, (368), 324 states have internal predecessors, (368), 59 states have call successors, (59), 32 states have call predecessors, (59), 43 states have return successors, (285), 74 states have call predecessors, (285), 52 states have call successors, (285) [2021-11-21 01:26:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 712 transitions. [2021-11-21 01:26:48,041 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 712 transitions. Word has length 79 [2021-11-21 01:26:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:48,041 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 712 transitions. [2021-11-21 01:26:48,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.9) internal successors, (78), 19 states have internal predecessors, (78), 10 states have call successors, (14), 2 states have call predecessors, (14), 8 states have return successors, (15), 8 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-21 01:26:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 712 transitions. [2021-11-21 01:26:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-21 01:26:48,045 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:48,046 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1] [2021-11-21 01:26:48,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:48,260 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:48,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:48,261 INFO L85 PathProgramCache]: Analyzing trace with hash 57909511, now seen corresponding path program 3 times [2021-11-21 01:26:48,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211315842] [2021-11-21 01:26:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:48,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:48,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:48,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:48,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211315842] [2021-11-21 01:26:48,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211315842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:48,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379603707] [2021-11-21 01:26:48,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:26:48,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:48,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:48,717 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:48,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:26:48,818 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:26:48,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-21 01:26:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:49,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379603707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:49,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174512166] [2021-11-21 01:26:49,985 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:26:49,985 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:49,986 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:49,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2021-11-21 01:26:49,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104041304] [2021-11-21 01:26:49,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-21 01:26:49,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:49,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-21 01:26:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2021-11-21 01:26:49,993 INFO L87 Difference]: Start difference. First operand 431 states and 712 transitions. Second operand has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:52,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:52,686 INFO L93 Difference]: Finished difference Result 3544 states and 5639 transitions. [2021-11-21 01:26:52,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-21 01:26:52,689 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-21 01:26:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:52,735 INFO L225 Difference]: With dead ends: 3544 [2021-11-21 01:26:52,735 INFO L226 Difference]: Without dead ends: 3543 [2021-11-21 01:26:52,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1382, Invalid=3448, Unknown=0, NotChecked=0, Total=4830 [2021-11-21 01:26:52,741 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1457 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1457 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:52,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1457 Valid, 1226 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-21 01:26:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-11-21 01:26:52,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 755. [2021-11-21 01:26:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 551 states have (on average 1.103448275862069) internal successors, (608), 552 states have internal predecessors, (608), 119 states have call successors, (119), 56 states have call predecessors, (119), 79 states have return successors, (1617), 146 states have call predecessors, (1617), 112 states have call successors, (1617) [2021-11-21 01:26:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 2344 transitions. [2021-11-21 01:26:52,962 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 2344 transitions. Word has length 76 [2021-11-21 01:26:52,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:52,963 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 2344 transitions. [2021-11-21 01:26:52,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.851063829787234) internal successors, (134), 48 states have internal predecessors, (134), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:26:52,964 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 2344 transitions. [2021-11-21 01:26:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-21 01:26:52,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:52,969 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:53,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:53,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:53,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:53,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:53,197 INFO L85 PathProgramCache]: Analyzing trace with hash -793022864, now seen corresponding path program 3 times [2021-11-21 01:26:53,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:53,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963501603] [2021-11-21 01:26:53,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:53,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 19 proven. 112 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-21 01:26:53,429 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963501603] [2021-11-21 01:26:53,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963501603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:53,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911839868] [2021-11-21 01:26:53,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:26:53,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:53,436 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:53,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:26:53,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:26:53,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:53,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 01:26:53,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:53,875 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 40 proven. 53 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-21 01:26:53,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:54,359 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 40 proven. 61 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-21 01:26:54,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911839868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:54,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2085655214] [2021-11-21 01:26:54,365 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-21 01:26:54,365 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:54,366 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:54,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:54,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 13] total 31 [2021-11-21 01:26:54,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783445886] [2021-11-21 01:26:54,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:54,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-21 01:26:54,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-21 01:26:54,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-11-21 01:26:54,373 INFO L87 Difference]: Start difference. First operand 755 states and 2344 transitions. Second operand has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 01:26:55,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:55,066 INFO L93 Difference]: Finished difference Result 1776 states and 5617 transitions. [2021-11-21 01:26:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 01:26:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) Word has length 85 [2021-11-21 01:26:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:55,083 INFO L225 Difference]: With dead ends: 1776 [2021-11-21 01:26:55,083 INFO L226 Difference]: Without dead ends: 1042 [2021-11-21 01:26:55,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=285, Invalid=1521, Unknown=0, NotChecked=0, Total=1806 [2021-11-21 01:26:55,110 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 193 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:55,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 426 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-21 01:26:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-11-21 01:26:55,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 874. [2021-11-21 01:26:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 663 states have (on average 1.0829562594268476) internal successors, (718), 645 states have internal predecessors, (718), 118 states have call successors, (118), 88 states have call predecessors, (118), 88 states have return successors, (489), 140 states have call predecessors, (489), 117 states have call successors, (489) [2021-11-21 01:26:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1325 transitions. [2021-11-21 01:26:55,243 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1325 transitions. Word has length 85 [2021-11-21 01:26:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:55,244 INFO L470 AbstractCegarLoop]: Abstraction has 874 states and 1325 transitions. [2021-11-21 01:26:55,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 21 states have internal predecessors, (89), 18 states have call successors, (20), 10 states have call predecessors, (20), 7 states have return successors, (14), 7 states have call predecessors, (14), 9 states have call successors, (14) [2021-11-21 01:26:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1325 transitions. [2021-11-21 01:26:55,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-21 01:26:55,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:55,257 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:55,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 01:26:55,477 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting hanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1232791888, now seen corresponding path program 1 times [2021-11-21 01:26:55,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404642308] [2021-11-21 01:26:55,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:55,577 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-21 01:26:55,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404642308] [2021-11-21 01:26:55,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404642308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:55,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282767107] [2021-11-21 01:26:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:55,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:55,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:55,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 01:26:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-21 01:26:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-11-21 01:26:56,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:26:56,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282767107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:26:56,058 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:26:56,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2021-11-21 01:26:56,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293385626] [2021-11-21 01:26:56,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:26:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 01:26:56,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 01:26:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:56,061 INFO L87 Difference]: Start difference. First operand 874 states and 1325 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:26:56,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:56,152 INFO L93 Difference]: Finished difference Result 874 states and 1325 transitions. [2021-11-21 01:26:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 01:26:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 144 [2021-11-21 01:26:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:56,163 INFO L225 Difference]: With dead ends: 874 [2021-11-21 01:26:56,163 INFO L226 Difference]: Without dead ends: 858 [2021-11-21 01:26:56,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-21 01:26:56,165 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:56,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 110 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:26:56,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-11-21 01:26:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 858. [2021-11-21 01:26:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 651 states have (on average 1.055299539170507) internal successors, (687), 631 states have internal predecessors, (687), 118 states have call successors, (118), 88 states have call predecessors, (118), 86 states have return successors, (487), 138 states have call predecessors, (487), 117 states have call successors, (487) [2021-11-21 01:26:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1292 transitions. [2021-11-21 01:26:56,253 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1292 transitions. Word has length 144 [2021-11-21 01:26:56,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:56,253 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 1292 transitions. [2021-11-21 01:26:56,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-21 01:26:56,254 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1292 transitions. [2021-11-21 01:26:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-21 01:26:56,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:56,259 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:26:56,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 01:26:56,480 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:56,481 INFO L85 PathProgramCache]: Analyzing trace with hash 990876778, now seen corresponding path program 2 times [2021-11-21 01:26:56,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:56,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550011517] [2021-11-21 01:26:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:56,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-21 01:26:56,592 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:56,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550011517] [2021-11-21 01:26:56,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550011517] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685732548] [2021-11-21 01:26:56,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:26:56,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:56,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:56,594 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:56,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 01:26:56,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:26:56,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:26:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 01:26:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:26:57,018 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-21 01:26:57,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:26:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2021-11-21 01:26:57,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685732548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:26:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1342825264] [2021-11-21 01:26:57,656 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:26:57,657 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:26:57,657 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:26:57,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:26:57,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2021-11-21 01:26:57,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535788377] [2021-11-21 01:26:57,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:26:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-21 01:26:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:26:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-21 01:26:57,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:26:57,662 INFO L87 Difference]: Start difference. First operand 858 states and 1292 transitions. Second operand has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-21 01:26:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:26:57,779 INFO L93 Difference]: Finished difference Result 1003 states and 1479 transitions. [2021-11-21 01:26:57,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 01:26:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) Word has length 155 [2021-11-21 01:26:57,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:26:57,791 INFO L225 Difference]: With dead ends: 1003 [2021-11-21 01:26:57,791 INFO L226 Difference]: Without dead ends: 890 [2021-11-21 01:26:57,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:26:57,793 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:26:57,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 165 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:26:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-11-21 01:26:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-11-21 01:26:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 679 states have (on average 1.041237113402062) internal successors, (707), 656 states have internal predecessors, (707), 118 states have call successors, (118), 88 states have call predecessors, (118), 91 states have return successors, (494), 145 states have call predecessors, (494), 117 states have call successors, (494) [2021-11-21 01:26:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1319 transitions. [2021-11-21 01:26:57,883 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1319 transitions. Word has length 155 [2021-11-21 01:26:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:26:57,884 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1319 transitions. [2021-11-21 01:26:57,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 16 states have internal predecessors, (55), 1 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (10), 8 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-21 01:26:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1319 transitions. [2021-11-21 01:26:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-21 01:26:57,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:26:57,893 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1] [2021-11-21 01:26:57,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 01:26:58,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:58,115 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:26:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:26:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash -385252409, now seen corresponding path program 4 times [2021-11-21 01:26:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:26:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006870533] [2021-11-21 01:26:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:26:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:26:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:26:59,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:26:59,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006870533] [2021-11-21 01:26:59,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006870533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:26:59,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255619701] [2021-11-21 01:26:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:26:59,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:26:59,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:26:59,357 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:26:59,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 01:26:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:26:59,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-21 01:26:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:00,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 0 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255619701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:02,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060525726] [2021-11-21 01:27:02,619 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:27:02,619 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:02,619 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:27:02,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:02,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 95 [2021-11-21 01:27:02,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477650040] [2021-11-21 01:27:02,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:02,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-21 01:27:02,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-21 01:27:02,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2351, Invalid=6769, Unknown=0, NotChecked=0, Total=9120 [2021-11-21 01:27:02,628 INFO L87 Difference]: Start difference. First operand 890 states and 1319 transitions. Second operand has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:09,096 INFO L93 Difference]: Finished difference Result 4921 states and 6635 transitions. [2021-11-21 01:27:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-21 01:27:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-11-21 01:27:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:09,145 INFO L225 Difference]: With dead ends: 4921 [2021-11-21 01:27:09,145 INFO L226 Difference]: Without dead ends: 4920 [2021-11-21 01:27:09,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5642, Invalid=14380, Unknown=0, NotChecked=0, Total=20022 [2021-11-21 01:27:09,159 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 2935 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 2552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2935 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 4817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2552 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:09,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2935 Valid, 2182 Invalid, 4817 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2552 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-11-21 01:27:09,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4920 states. [2021-11-21 01:27:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4920 to 1718. [2021-11-21 01:27:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1303 states have (on average 1.0399079048349962) internal successors, (1355), 1256 states have internal predecessors, (1355), 250 states have call successors, (250), 184 states have call predecessors, (250), 163 states have return successors, (1580), 277 states have call predecessors, (1580), 249 states have call successors, (1580) [2021-11-21 01:27:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3185 transitions. [2021-11-21 01:27:09,423 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3185 transitions. Word has length 160 [2021-11-21 01:27:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:09,423 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 3185 transitions. [2021-11-21 01:27:09,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 2.9263157894736844) internal successors, (278), 96 states have internal predecessors, (278), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:09,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3185 transitions. [2021-11-21 01:27:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-11-21 01:27:09,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:09,435 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:09,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:09,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 01:27:09,654 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:27:09,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:09,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1013191190, now seen corresponding path program 3 times [2021-11-21 01:27:09,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:09,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742173784] [2021-11-21 01:27:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:09,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2021-11-21 01:27:09,877 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:09,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742173784] [2021-11-21 01:27:09,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742173784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:09,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219382082] [2021-11-21 01:27:09,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:27:09,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:09,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:09,879 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:09,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 01:27:10,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:27:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:10,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-21 01:27:10,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 164 proven. 246 refuted. 0 times theorem prover too weak. 426 trivial. 0 not checked. [2021-11-21 01:27:10,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 836 backedges. 164 proven. 333 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-11-21 01:27:13,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219382082] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:13,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562288372] [2021-11-21 01:27:13,771 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:27:13,772 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:13,772 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:27:13,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:13,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 27] total 47 [2021-11-21 01:27:13,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854712573] [2021-11-21 01:27:13,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:13,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-21 01:27:13,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-21 01:27:13,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1941, Unknown=0, NotChecked=0, Total=2162 [2021-11-21 01:27:13,779 INFO L87 Difference]: Start difference. First operand 1718 states and 3185 transitions. Second operand has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-11-21 01:27:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:15,640 INFO L93 Difference]: Finished difference Result 2531 states and 7860 transitions. [2021-11-21 01:27:15,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-21 01:27:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) Word has length 203 [2021-11-21 01:27:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:15,704 INFO L225 Difference]: With dead ends: 2531 [2021-11-21 01:27:15,704 INFO L226 Difference]: Without dead ends: 2194 [2021-11-21 01:27:15,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1017, Invalid=6465, Unknown=0, NotChecked=0, Total=7482 [2021-11-21 01:27:15,715 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 551 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:15,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 289 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-21 01:27:15,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2194 states. [2021-11-21 01:27:15,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2194 to 2069. [2021-11-21 01:27:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 1515 states have (on average 1.0343234323432344) internal successors, (1567), 1468 states have internal predecessors, (1567), 318 states have call successors, (318), 184 states have call predecessors, (318), 234 states have return successors, (3901), 416 states have call predecessors, (3901), 295 states have call successors, (3901) [2021-11-21 01:27:16,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5786 transitions. [2021-11-21 01:27:16,033 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5786 transitions. Word has length 203 [2021-11-21 01:27:16,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:16,034 INFO L470 AbstractCegarLoop]: Abstraction has 2069 states and 5786 transitions. [2021-11-21 01:27:16,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.8666666666666667) internal successors, (174), 43 states have internal predecessors, (174), 20 states have call successors, (24), 3 states have call predecessors, (24), 20 states have return successors, (36), 21 states have call predecessors, (36), 18 states have call successors, (36) [2021-11-21 01:27:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5786 transitions. [2021-11-21 01:27:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-21 01:27:16,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:16,088 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1] [2021-11-21 01:27:16,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-21 01:27:16,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:16,305 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:27:16,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash -371414713, now seen corresponding path program 5 times [2021-11-21 01:27:16,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:16,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894475074] [2021-11-21 01:27:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:16,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:16,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:19,828 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894475074] [2021-11-21 01:27:19,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894475074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:19,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348023388] [2021-11-21 01:27:19,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:27:19,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:19,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:19,830 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:19,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 01:27:20,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2021-11-21 01:27:20,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:27:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1391 conjuncts, 189 conjunts are in the unsatisfiable core [2021-11-21 01:27:20,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:27:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:21,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:27:29,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7383 backedges. 0 proven. 7383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:27:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348023388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:27:29,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1353935048] [2021-11-21 01:27:29,371 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:27:29,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:27:29,372 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:27:29,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:27:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 191 [2021-11-21 01:27:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555026600] [2021-11-21 01:27:29,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:27:29,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-11-21 01:27:29,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:27:29,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-11-21 01:27:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9311, Invalid=27361, Unknown=0, NotChecked=0, Total=36672 [2021-11-21 01:27:29,389 INFO L87 Difference]: Start difference. First operand 2069 states and 5786 transitions. Second operand has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:57,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:27:57,237 INFO L93 Difference]: Finished difference Result 9480 states and 28240 transitions. [2021-11-21 01:27:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-11-21 01:27:57,238 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 328 [2021-11-21 01:27:57,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:27:57,592 INFO L225 Difference]: With dead ends: 9480 [2021-11-21 01:27:57,593 INFO L226 Difference]: Without dead ends: 9479 [2021-11-21 01:27:57,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 606 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18040 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=22802, Invalid=58708, Unknown=0, NotChecked=0, Total=81510 [2021-11-21 01:27:57,637 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 7981 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 8388 mSolverCounterSat, 12434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7981 SdHoareTripleChecker+Valid, 4441 SdHoareTripleChecker+Invalid, 20822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 12434 IncrementalHoareTripleChecker+Valid, 8388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2021-11-21 01:27:57,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7981 Valid, 4441 Invalid, 20822 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [12434 Valid, 8388 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2021-11-21 01:27:57,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9479 states. [2021-11-21 01:27:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9479 to 4133. [2021-11-21 01:27:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 3003 states have (on average 1.0333000333000333) internal successors, (3103), 2908 states have internal predecessors, (3103), 654 states have call successors, (654), 376 states have call predecessors, (654), 474 states have return successors, (18721), 848 states have call predecessors, (18721), 607 states have call successors, (18721) [2021-11-21 01:27:58,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 22478 transitions. [2021-11-21 01:27:58,990 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 22478 transitions. Word has length 328 [2021-11-21 01:27:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:27:58,991 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 22478 transitions. [2021-11-21 01:27:58,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 2.9633507853403143) internal successors, (566), 192 states have internal predecessors, (566), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:27:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 22478 transitions. [2021-11-21 01:27:59,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 600 [2021-11-21 01:27:59,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:27:59,076 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 32, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:27:59,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-21 01:27:59,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:59,297 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:27:59,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:27:59,297 INFO L85 PathProgramCache]: Analyzing trace with hash 682757040, now seen corresponding path program 4 times [2021-11-21 01:27:59,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:27:59,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794400746] [2021-11-21 01:27:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:27:59,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:27:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:27:59,646 INFO L134 CoverageAnalysis]: Checked inductivity of 11863 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 11688 trivial. 0 not checked. [2021-11-21 01:27:59,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:27:59,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794400746] [2021-11-21 01:27:59,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794400746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:27:59,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194292959] [2021-11-21 01:27:59,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:27:59,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:27:59,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:27:59,673 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:27:59,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 01:28:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:28:00,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-21 01:28:00,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:28:01,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11863 backedges. 421 proven. 1917 refuted. 0 times theorem prover too weak. 9525 trivial. 0 not checked. [2021-11-21 01:28:01,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 11863 backedges. 421 proven. 2073 refuted. 0 times theorem prover too weak. 9369 trivial. 0 not checked. [2021-11-21 01:28:06,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194292959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:28:06,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327212784] [2021-11-21 01:28:06,866 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:28:06,867 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:28:06,868 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:28:06,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:28:06,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 33] total 55 [2021-11-21 01:28:06,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513856468] [2021-11-21 01:28:06,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:28:06,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-21 01:28:06,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:28:06,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-21 01:28:06,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2680, Unknown=0, NotChecked=0, Total=2970 [2021-11-21 01:28:06,878 INFO L87 Difference]: Start difference. First operand 4133 states and 22478 transitions. Second operand has 55 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 51 states have internal predecessors, (208), 25 states have call successors, (29), 3 states have call predecessors, (29), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-21 01:28:09,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:28:09,604 INFO L93 Difference]: Finished difference Result 5412 states and 35620 transitions. [2021-11-21 01:28:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-21 01:28:09,605 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 51 states have internal predecessors, (208), 25 states have call successors, (29), 3 states have call predecessors, (29), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) Word has length 599 [2021-11-21 01:28:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:28:10,236 INFO L225 Difference]: With dead ends: 5412 [2021-11-21 01:28:10,236 INFO L226 Difference]: Without dead ends: 5061 [2021-11-21 01:28:10,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1263 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1410, Invalid=9510, Unknown=0, NotChecked=0, Total=10920 [2021-11-21 01:28:10,282 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 531 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1817 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:28:10,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [552 Valid, 372 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1817 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-21 01:28:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5061 states. [2021-11-21 01:28:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5061 to 4606. [2021-11-21 01:28:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4606 states, 3293 states have (on average 1.0303674460977832) internal successors, (3393), 3198 states have internal predecessors, (3393), 756 states have call successors, (756), 376 states have call predecessors, (756), 555 states have return successors, (27975), 1031 states have call predecessors, (27975), 709 states have call successors, (27975) [2021-11-21 01:28:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4606 states to 4606 states and 32124 transitions. [2021-11-21 01:28:12,099 INFO L78 Accepts]: Start accepts. Automaton has 4606 states and 32124 transitions. Word has length 599 [2021-11-21 01:28:12,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:28:12,283 INFO L470 AbstractCegarLoop]: Abstraction has 4606 states and 32124 transitions. [2021-11-21 01:28:12,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 53 states have (on average 3.9245283018867925) internal successors, (208), 51 states have internal predecessors, (208), 25 states have call successors, (29), 3 states have call predecessors, (29), 24 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2021-11-21 01:28:12,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4606 states and 32124 transitions. [2021-11-21 01:28:13,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 665 [2021-11-21 01:28:13,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:28:13,249 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 1, 1, 1, 1] [2021-11-21 01:28:13,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 01:28:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:28:13,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:28:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:28:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1801483335, now seen corresponding path program 6 times [2021-11-21 01:28:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:28:13,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135473644] [2021-11-21 01:28:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:28:13,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:28:13,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:28:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:25,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:28:25,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135473644] [2021-11-21 01:28:25,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135473644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:28:25,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87076632] [2021-11-21 01:28:25,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:28:25,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:28:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:28:25,316 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:28:25,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 01:28:25,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:28:25,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:28:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 2783 conjuncts, 381 conjunts are in the unsatisfiable core [2021-11-21 01:28:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:28:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:27,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:28:58,241 INFO L134 CoverageAnalysis]: Checked inductivity of 30879 backedges. 0 proven. 30879 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:28:58,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87076632] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:28:58,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789918189] [2021-11-21 01:28:58,244 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-21 01:28:58,244 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:28:58,245 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:28:58,246 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:28:58,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [191, 191, 191] total 383 [2021-11-21 01:28:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692324636] [2021-11-21 01:28:58,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:28:58,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-11-21 01:28:58,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:28:58,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-11-21 01:28:58,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37055, Invalid=110017, Unknown=0, NotChecked=0, Total=147072 [2021-11-21 01:28:58,277 INFO L87 Difference]: Start difference. First operand 4606 states and 32124 transitions. Second operand has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:32:41,292 INFO L93 Difference]: Finished difference Result 15265 states and 174238 transitions. [2021-11-21 01:32:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 383 states. [2021-11-21 01:32:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 664 [2021-11-21 01:32:41,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:32:44,419 INFO L225 Difference]: With dead ends: 15265 [2021-11-21 01:32:44,419 INFO L226 Difference]: Without dead ends: 15264 [2021-11-21 01:32:44,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1802 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72952 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=91682, Invalid=237220, Unknown=0, NotChecked=0, Total=328902 [2021-11-21 01:32:44,487 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 23696 mSDsluCounter, 10251 mSDsCounter, 0 mSdLazyCounter, 31145 mSolverCounterSat, 45861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23696 SdHoareTripleChecker+Valid, 11132 SdHoareTripleChecker+Invalid, 77006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.9s SdHoareTripleChecker+Time, 45861 IncrementalHoareTripleChecker+Valid, 31145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.3s IncrementalHoareTripleChecker+Time [2021-11-21 01:32:44,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23696 Valid, 11132 Invalid, 77006 Unknown, 0 Unchecked, 0.9s Time], IncrementalHoareTripleChecker [45861 Valid, 31145 Invalid, 0 Unknown, 0 Unchecked, 51.3s Time] [2021-11-21 01:32:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15264 states. [2021-11-21 01:32:51,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15264 to 9694. [2021-11-21 01:32:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9694 states, 6845 states have (on average 1.0286340394448503) internal successors, (7041), 6654 states have internal predecessors, (7041), 1620 states have call successors, (1620), 760 states have call predecessors, (1620), 1227 states have return successors, (159495), 2279 states have call predecessors, (159495), 1525 states have call successors, (159495) [2021-11-21 01:32:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9694 states to 9694 states and 168156 transitions. [2021-11-21 01:32:54,520 INFO L78 Accepts]: Start accepts. Automaton has 9694 states and 168156 transitions. Word has length 664 [2021-11-21 01:32:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:32:54,522 INFO L470 AbstractCegarLoop]: Abstraction has 9694 states and 168156 transitions. [2021-11-21 01:32:54,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 2.9817232375979112) internal successors, (1142), 384 states have internal predecessors, (1142), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:32:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9694 states and 168156 transitions. [2021-11-21 01:32:56,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2178 [2021-11-21 01:32:56,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:32:56,508 INFO L514 BasicCegarLoop]: trace histogram [255, 255, 128, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 127, 16, 15, 15, 15, 15, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:32:56,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 01:32:56,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-21 01:32:56,709 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [applyHanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, applyHanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 9 more)] === [2021-11-21 01:32:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:32:56,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1713148918, now seen corresponding path program 5 times [2021-11-21 01:32:56,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:32:56,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534566900] [2021-11-21 01:32:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:32:56,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:32:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:32:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 194331 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 194103 trivial. 0 not checked. [2021-11-21 01:32:57,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:32:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534566900] [2021-11-21 01:32:57,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534566900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:32:57,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937486594] [2021-11-21 01:32:57,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:32:57,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:32:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:32:57,989 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:32:58,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a9fa3b-e3a2-4ae3-b2a6-5c1aa2d8cf21/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 01:32:58,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-21 01:32:58,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:32:58,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:32:58,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:33:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 194331 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 194103 trivial. 0 not checked. [2021-11-21 01:33:02,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:33:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 194331 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 194103 trivial. 0 not checked. [2021-11-21 01:33:12,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937486594] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:33:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443077583] [2021-11-21 01:33:12,393 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2021-11-21 01:33:12,393 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:33:12,393 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:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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) [2021-11-21 01:33:12,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-21 01:33:12,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2021-11-21 01:33:12,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873956541] [2021-11-21 01:33:12,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-21 01:33:12,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-21 01:33:12,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:33:12,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-21 01:33:12,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1141, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 01:33:12,401 INFO L87 Difference]: Start difference. First operand 9694 states and 168156 transitions. Second operand has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 1 states have call successors, (5), 1 states have call predecessors, (5), 20 states have return successors, (22), 20 states have call predecessors, (22), 1 states have call successors, (22) [2021-11-21 01:33:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:33:15,549 INFO L93 Difference]: Finished difference Result 10065 states and 168586 transitions. [2021-11-21 01:33:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-21 01:33:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.2564102564102564) internal successors, (127), 40 states have internal predecessors, (127), 1 states have call successors, (5), 1 states have call predecessors, (5), 20 states have return successors, (22), 20 states have call predecessors, (22), 1 states have call successors, (22) Word has length 2177 [2021-11-21 01:33:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:33:18,013 INFO L225 Difference]: With dead ends: 10065 [2021-11-21 01:33:18,013 INFO L226 Difference]: Without dead ends: 9764