./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-numeric/recHanoi02-1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-numeric/recHanoi02-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba --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 64bit --witnessprinter.graph.data.programhash fc483b08189ee3c98902d05e6dbaf5e8d67294309bb86f0f1cb0c68cd8f4471f --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 00:27:42,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 00:27:42,328 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 00:27:42,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 00:27:42,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 00:27:42,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 00:27:42,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 00:27:42,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 00:27:42,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 00:27:42,385 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 00:27:42,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 00:27:42,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 00:27:42,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 00:27:42,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 00:27:42,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 00:27:42,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 00:27:42,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 00:27:42,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 00:27:42,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 00:27:42,407 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 00:27:42,409 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 00:27:42,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 00:27:42,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 00:27:42,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 00:27:42,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 00:27:42,424 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 00:27:42,424 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 00:27:42,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 00:27:42,427 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 00:27:42,428 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 00:27:42,429 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 00:27:42,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 00:27:42,432 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 00:27:42,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 00:27:42,435 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 00:27:42,435 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 00:27:42,436 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 00:27:42,436 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 00:27:42,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 00:27:42,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 00:27:42,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 00:27:42,448 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/config/svcomp-Overflow-64bit-Taipan_Default.epf [2022-11-22 00:27:42,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 00:27:42,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 00:27:42,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 00:27:42,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 00:27:42,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 00:27:42,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 00:27:42,503 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 00:27:42,503 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 00:27:42,504 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 00:27:42,504 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 00:27:42,505 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 00:27:42,505 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 00:27:42,505 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 00:27:42,505 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 00:27:42,505 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 00:27:42,506 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 00:27:42,506 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 00:27:42,506 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 00:27:42,507 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 00:27:42,507 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 00:27:42,508 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 00:27:42,508 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 00:27:42,508 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 00:27:42,508 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 00:27:42,508 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 00:27:42,509 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-22 00:27:42,509 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 00:27:42,509 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 00:27:42,510 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 00:27:42,510 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 00:27:42,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 00:27:42,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:27:42,511 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 00:27:42,511 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 00:27:42,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 00:27:42,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 00:27:42,511 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 00:27:42,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 00:27:42,512 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 00:27:42,512 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 00:27:42,512 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc483b08189ee3c98902d05e6dbaf5e8d67294309bb86f0f1cb0c68cd8f4471f [2022-11-22 00:27:42,823 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 00:27:42,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 00:27:42,864 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 00:27:42,865 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 00:27:42,866 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 00:27:42,867 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/termination-numeric/recHanoi02-1.c [2022-11-22 00:27:45,878 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 00:27:46,067 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 00:27:46,068 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/sv-benchmarks/c/termination-numeric/recHanoi02-1.c [2022-11-22 00:27:46,104 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/data/7a69359d5/caddf04accf146fe9eb55ed927681f74/FLAG4df32d1c4 [2022-11-22 00:27:46,133 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/data/7a69359d5/caddf04accf146fe9eb55ed927681f74 [2022-11-22 00:27:46,138 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 00:27:46,158 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 00:27:46,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 00:27:46,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 00:27:46,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 00:27:46,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fd29213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46, skipping insertion in model container [2022-11-22 00:27:46,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 00:27:46,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 00:27:46,400 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/sv-benchmarks/c/termination-numeric/recHanoi02-1.c[769,782] [2022-11-22 00:27:46,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:27:46,416 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 00:27:46,438 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/sv-benchmarks/c/termination-numeric/recHanoi02-1.c[769,782] [2022-11-22 00:27:46,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 00:27:46,454 INFO L208 MainTranslator]: Completed translation [2022-11-22 00:27:46,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46 WrapperNode [2022-11-22 00:27:46,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 00:27:46,457 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 00:27:46,457 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 00:27:46,457 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 00:27:46,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,473 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,492 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2022-11-22 00:27:46,492 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 00:27:46,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 00:27:46,494 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 00:27:46,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 00:27:46,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,504 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,506 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,512 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 00:27:46,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 00:27:46,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 00:27:46,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 00:27:46,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (1/1) ... [2022-11-22 00:27:46,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 00:27:46,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:46,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 00:27:46,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 00:27:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 00:27:46,591 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2022-11-22 00:27:46,591 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2022-11-22 00:27:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 00:27:46,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 00:27:46,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 00:27:46,660 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 00:27:46,663 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 00:27:46,832 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 00:27:46,855 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 00:27:46,855 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-22 00:27:46,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:27:46 BoogieIcfgContainer [2022-11-22 00:27:46,858 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 00:27:46,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 00:27:46,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 00:27:46,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 00:27:46,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 12:27:46" (1/3) ... [2022-11-22 00:27:46,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8c9671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:27:46, skipping insertion in model container [2022-11-22 00:27:46,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 12:27:46" (2/3) ... [2022-11-22 00:27:46,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b8c9671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 12:27:46, skipping insertion in model container [2022-11-22 00:27:46,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 12:27:46" (3/3) ... [2022-11-22 00:27:46,869 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi02-1.c [2022-11-22 00:27:46,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 00:27:46,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-22 00:27:46,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 00:27:46,948 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c60b213, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 00:27:46,948 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-22 00:27:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:27:46,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 00:27:46,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:46,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 00:27:46,960 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:46,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2121594553, now seen corresponding path program 1 times [2022-11-22 00:27:46,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:46,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386280035] [2022-11-22 00:27:46,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:46,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:47,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386280035] [2022-11-22 00:27:47,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386280035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:47,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:47,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:27:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384648951] [2022-11-22 00:27:47,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:47,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:27:47,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:47,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:27:47,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:27:47,242 INFO L87 Difference]: Start difference. First operand has 24 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 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) [2022-11-22 00:27:47,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:47,374 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-11-22 00:27:47,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 00:27:47,377 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2022-11-22 00:27:47,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:47,384 INFO L225 Difference]: With dead ends: 26 [2022-11-22 00:27:47,384 INFO L226 Difference]: Without dead ends: 20 [2022-11-22 00:27:47,387 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:27:47,391 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:47,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 28 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:47,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-22 00:27:47,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-22 00:27:47,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 17 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 00:27:47,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-11-22 00:27:47,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2022-11-22 00:27:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:47,429 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-11-22 00:27:47,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-11-22 00:27:47,430 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-11-22 00:27:47,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 00:27:47,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:47,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:47,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 00:27:47,431 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:47,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:47,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1344921665, now seen corresponding path program 1 times [2022-11-22 00:27:47,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:47,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411702232] [2022-11-22 00:27:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:47,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:47,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:47,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:47,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411702232] [2022-11-22 00:27:47,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411702232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:47,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:47,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 00:27:47,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071589028] [2022-11-22 00:27:47,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:47,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 00:27:47,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:47,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 00:27:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-22 00:27:47,505 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:47,564 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-11-22 00:27:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:27:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 00:27:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:47,567 INFO L225 Difference]: With dead ends: 39 [2022-11-22 00:27:47,567 INFO L226 Difference]: Without dead ends: 36 [2022-11-22 00:27:47,568 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:27:47,569 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:47,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 52 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:27:47,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-22 00:27:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-11-22 00:27:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-22 00:27:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-11-22 00:27:47,599 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2022-11-22 00:27:47,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:47,600 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-11-22 00:27:47,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-11-22 00:27:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 00:27:47,602 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:47,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:47,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 00:27:47,602 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:47,603 INFO L85 PathProgramCache]: Analyzing trace with hash -168070099, now seen corresponding path program 1 times [2022-11-22 00:27:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:47,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835847819] [2022-11-22 00:27:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:47,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:47,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:47,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835847819] [2022-11-22 00:27:47,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835847819] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883217617] [2022-11-22 00:27:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:47,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:47,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 00:27:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:47,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 00:27:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:47,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:47,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883217617] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:47,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1442088333] [2022-11-22 00:27:47,962 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:27:47,963 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:47,968 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:27:47,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:47,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-22 00:27:47,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886794515] [2022-11-22 00:27:47,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:47,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 00:27:47,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 00:27:47,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:27:47,983 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-11-22 00:27:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:48,238 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-11-22 00:27:48,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-22 00:27:48,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 12 [2022-11-22 00:27:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:48,244 INFO L225 Difference]: With dead ends: 91 [2022-11-22 00:27:48,244 INFO L226 Difference]: Without dead ends: 90 [2022-11-22 00:27:48,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-11-22 00:27:48,250 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 185 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:48,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 105 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:48,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-22 00:27:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 66. [2022-11-22 00:27:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 55 states have internal predecessors, (75), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-22 00:27:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2022-11-22 00:27:48,274 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 12 [2022-11-22 00:27:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:48,275 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2022-11-22 00:27:48,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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) [2022-11-22 00:27:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2022-11-22 00:27:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 00:27:48,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:48,276 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:48,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:48,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:48,488 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:48,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1692888866, now seen corresponding path program 1 times [2022-11-22 00:27:48,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:48,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863267356] [2022-11-22 00:27:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:48,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 00:27:48,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:48,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863267356] [2022-11-22 00:27:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863267356] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:48,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 00:27:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 00:27:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438200126] [2022-11-22 00:27:48,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:48,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 00:27:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 00:27:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 00:27:48,552 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 00:27:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:48,586 INFO L93 Difference]: Finished difference Result 103 states and 139 transitions. [2022-11-22 00:27:48,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 00:27:48,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-22 00:27:48,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:48,588 INFO L225 Difference]: With dead ends: 103 [2022-11-22 00:27:48,588 INFO L226 Difference]: Without dead ends: 92 [2022-11-22 00:27:48,589 INFO L412 NwaCegarLoop]: 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 [2022-11-22 00:27:48,590 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:48,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:27:48,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-22 00:27:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-22 00:27:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 77 states have internal predecessors, (97), 6 states have call successors, (6), 5 states have call predecessors, (6), 7 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-22 00:27:48,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-11-22 00:27:48,602 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 14 [2022-11-22 00:27:48,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:48,602 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-11-22 00:27:48,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-22 00:27:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-11-22 00:27:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:27:48,604 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:48,604 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1] [2022-11-22 00:27:48,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 00:27:48,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:48,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1195792703, now seen corresponding path program 2 times [2022-11-22 00:27:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:48,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082598512] [2022-11-22 00:27:48,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:48,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:48,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082598512] [2022-11-22 00:27:48,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082598512] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:48,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254916798] [2022-11-22 00:27:48,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:27:48,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:48,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:48,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 00:27:48,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:27:48,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:48,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 00:27:48,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:49,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:49,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254916798] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:49,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1214181037] [2022-11-22 00:27:49,297 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:27:49,297 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:49,297 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:27:49,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:49,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-22 00:27:49,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886012766] [2022-11-22 00:27:49,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:49,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 00:27:49,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:49,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 00:27:49,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:27:49,301 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:49,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:49,878 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2022-11-22 00:27:49,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-22 00:27:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-22 00:27:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:49,880 INFO L225 Difference]: With dead ends: 247 [2022-11-22 00:27:49,881 INFO L226 Difference]: Without dead ends: 246 [2022-11-22 00:27:49,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=515, Invalid=1207, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 00:27:49,883 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 542 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:49,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 242 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 00:27:49,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-11-22 00:27:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 206. [2022-11-22 00:27:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 170 states have (on average 1.311764705882353) internal successors, (223), 173 states have internal predecessors, (223), 12 states have call successors, (12), 11 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 11 states have call successors, (21) [2022-11-22 00:27:49,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 256 transitions. [2022-11-22 00:27:49,904 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 256 transitions. Word has length 27 [2022-11-22 00:27:49,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:49,905 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 256 transitions. [2022-11-22 00:27:49,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 14 states have internal predecessors, (43), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 256 transitions. [2022-11-22 00:27:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 00:27:49,906 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:49,906 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:49,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:50,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:50,112 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:50,112 INFO L85 PathProgramCache]: Analyzing trace with hash 753695794, now seen corresponding path program 1 times [2022-11-22 00:27:50,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:50,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971491817] [2022-11-22 00:27:50,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:50,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:50,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971491817] [2022-11-22 00:27:50,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971491817] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:50,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372607345] [2022-11-22 00:27:50,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:50,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:50,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:50,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 00:27:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:50,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:27:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:50,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:50,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372607345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:50,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1639846750] [2022-11-22 00:27:50,478 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:27:50,478 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:50,479 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:27:50,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:50,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-22 00:27:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206401810] [2022-11-22 00:27:50,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:50,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 00:27:50,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 00:27:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:27:50,483 INFO L87 Difference]: Start difference. First operand 206 states and 256 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:27:50,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:50,564 INFO L93 Difference]: Finished difference Result 399 states and 548 transitions. [2022-11-22 00:27:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 00:27:50,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) Word has length 26 [2022-11-22 00:27:50,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:50,571 INFO L225 Difference]: With dead ends: 399 [2022-11-22 00:27:50,571 INFO L226 Difference]: Without dead ends: 397 [2022-11-22 00:27:50,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-22 00:27:50,573 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:50,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-22 00:27:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 376. [2022-11-22 00:27:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 314 states have (on average 1.2547770700636942) internal successors, (394), 313 states have internal predecessors, (394), 12 states have call successors, (12), 11 states have call predecessors, (12), 46 states have return successors, (51), 51 states have call predecessors, (51), 11 states have call successors, (51) [2022-11-22 00:27:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 457 transitions. [2022-11-22 00:27:50,634 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 457 transitions. Word has length 26 [2022-11-22 00:27:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:50,635 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 457 transitions. [2022-11-22 00:27:50,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (5), 5 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-22 00:27:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 457 transitions. [2022-11-22 00:27:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 00:27:50,636 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:50,637 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 00:27:50,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:50,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:50,842 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:50,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:50,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1889733178, now seen corresponding path program 1 times [2022-11-22 00:27:50,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:50,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530608842] [2022-11-22 00:27:50,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:50,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:50,973 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:50,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530608842] [2022-11-22 00:27:50,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530608842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:50,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372897142] [2022-11-22 00:27:50,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:50,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:50,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:50,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:51,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 00:27:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 00:27:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 00:27:51,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 00:27:51,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372897142] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 00:27:51,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 00:27:51,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-11-22 00:27:51,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441245092] [2022-11-22 00:27:51,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 00:27:51,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 00:27:51,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:51,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 00:27:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:27:51,083 INFO L87 Difference]: Start difference. First operand 376 states and 457 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:27:51,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:51,126 INFO L93 Difference]: Finished difference Result 376 states and 457 transitions. [2022-11-22 00:27:51,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 00:27:51,127 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-22 00:27:51,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:51,129 INFO L225 Difference]: With dead ends: 376 [2022-11-22 00:27:51,129 INFO L226 Difference]: Without dead ends: 332 [2022-11-22 00:27:51,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-22 00:27:51,131 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 4 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:51,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 33 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 00:27:51,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-22 00:27:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-11-22 00:27:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 278 states have (on average 1.0611510791366907) internal successors, (295), 275 states have internal predecessors, (295), 12 states have call successors, (12), 11 states have call predecessors, (12), 40 states have return successors, (45), 45 states have call predecessors, (45), 11 states have call successors, (45) [2022-11-22 00:27:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 352 transitions. [2022-11-22 00:27:51,146 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 352 transitions. Word has length 27 [2022-11-22 00:27:51,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:51,147 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 352 transitions. [2022-11-22 00:27:51,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-22 00:27:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 352 transitions. [2022-11-22 00:27:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 00:27:51,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:51,149 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1] [2022-11-22 00:27:51,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 00:27:51,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:51,354 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:51,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2009114495, now seen corresponding path program 3 times [2022-11-22 00:27:51,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:51,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465092152] [2022-11-22 00:27:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:51,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:51,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465092152] [2022-11-22 00:27:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465092152] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949845296] [2022-11-22 00:27:51,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:27:51,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:51,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:51,914 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:51,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 00:27:51,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:27:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:51,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 00:27:51,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:52,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:52,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949845296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:52,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66707134] [2022-11-22 00:27:52,845 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:27:52,845 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:52,845 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:27:52,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:52,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-11-22 00:27:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918391787] [2022-11-22 00:27:52,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 00:27:52,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:52,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 00:27:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:27:52,848 INFO L87 Difference]: Start difference. First operand 332 states and 352 transitions. Second operand has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:54,256 INFO L93 Difference]: Finished difference Result 799 states and 832 transitions. [2022-11-22 00:27:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-22 00:27:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-11-22 00:27:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:54,263 INFO L225 Difference]: With dead ends: 799 [2022-11-22 00:27:54,263 INFO L226 Difference]: Without dead ends: 798 [2022-11-22 00:27:54,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2204, Invalid=5278, Unknown=0, NotChecked=0, Total=7482 [2022-11-22 00:27:54,268 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1354 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:54,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 437 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 00:27:54,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-11-22 00:27:54,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 776. [2022-11-22 00:27:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 650 states have (on average 1.063076923076923) internal successors, (691), 647 states have internal predecessors, (691), 24 states have call successors, (24), 23 states have call predecessors, (24), 100 states have return successors, (105), 105 states have call predecessors, (105), 23 states have call successors, (105) [2022-11-22 00:27:54,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 820 transitions. [2022-11-22 00:27:54,306 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 820 transitions. Word has length 57 [2022-11-22 00:27:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:54,306 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 820 transitions. [2022-11-22 00:27:54,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.022222222222222) internal successors, (91), 26 states have internal predecessors, (91), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:27:54,307 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 820 transitions. [2022-11-22 00:27:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 00:27:54,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:54,318 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-22 00:27:54,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:54,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash -769826526, now seen corresponding path program 2 times [2022-11-22 00:27:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:54,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791393809] [2022-11-22 00:27:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 00:27:54,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791393809] [2022-11-22 00:27:54,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791393809] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680576897] [2022-11-22 00:27:54,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:27:54,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:54,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:54,688 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:54,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 00:27:54,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 00:27:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:27:54,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 00:27:54,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 00:27:54,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:27:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 00:27:55,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680576897] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:27:55,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153348060] [2022-11-22 00:27:55,653 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:27:55,653 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:27:55,654 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:27:55,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:27:55,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-11-22 00:27:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965517174] [2022-11-22 00:27:55,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:27:55,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-22 00:27:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:27:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-22 00:27:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:27:55,656 INFO L87 Difference]: Start difference. First operand 776 states and 820 transitions. Second operand has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-22 00:27:55,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:27:55,770 INFO L93 Difference]: Finished difference Result 1713 states and 1894 transitions. [2022-11-22 00:27:55,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 00:27:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) Word has length 62 [2022-11-22 00:27:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:27:55,789 INFO L225 Difference]: With dead ends: 1713 [2022-11-22 00:27:55,793 INFO L226 Difference]: Without dead ends: 1415 [2022-11-22 00:27:55,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-22 00:27:55,800 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 00:27:55,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 00:27:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2022-11-22 00:27:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1415. [2022-11-22 00:27:55,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1202 states have (on average 1.0291181364392679) internal successors, (1237), 1193 states have internal predecessors, (1237), 24 states have call successors, (24), 23 states have call predecessors, (24), 187 states have return successors, (198), 198 states have call predecessors, (198), 23 states have call successors, (198) [2022-11-22 00:27:55,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 1459 transitions. [2022-11-22 00:27:55,859 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 1459 transitions. Word has length 62 [2022-11-22 00:27:55,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:27:55,860 INFO L495 AbstractCegarLoop]: Abstraction has 1415 states and 1459 transitions. [2022-11-22 00:27:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.0) internal successors, (69), 24 states have internal predecessors, (69), 1 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (11), 11 states have call predecessors, (11), 1 states have call successors, (11) [2022-11-22 00:27:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 1459 transitions. [2022-11-22 00:27:55,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-22 00:27:55,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:27:55,864 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1] [2022-11-22 00:27:55,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 00:27:56,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:56,070 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:27:56,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:27:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1606022143, now seen corresponding path program 4 times [2022-11-22 00:27:56,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:27:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181631116] [2022-11-22 00:27:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:27:56,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:27:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:57,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:27:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181631116] [2022-11-22 00:27:57,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181631116] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:27:57,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792793101] [2022-11-22 00:27:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:27:57,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:27:57,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:27:57,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:27:57,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 00:27:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:27:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 00:27:57,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:27:57,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:27:57,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:28:00,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792793101] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:00,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1798581246] [2022-11-22 00:28:00,396 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:28:00,396 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:00,397 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:28:00,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:00,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-11-22 00:28:00,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768432721] [2022-11-22 00:28:00,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:00,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-22 00:28:00,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:00,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-22 00:28:00,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-11-22 00:28:00,404 INFO L87 Difference]: Start difference. First operand 1415 states and 1459 transitions. Second operand has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:04,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:04,782 INFO L93 Difference]: Finished difference Result 3358 states and 3427 transitions. [2022-11-22 00:28:04,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-22 00:28:04,782 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2022-11-22 00:28:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:04,794 INFO L225 Difference]: With dead ends: 3358 [2022-11-22 00:28:04,795 INFO L226 Difference]: Without dead ends: 3357 [2022-11-22 00:28:04,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9119, Invalid=22033, Unknown=0, NotChecked=0, Total=31152 [2022-11-22 00:28:04,807 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 3072 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3074 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:04,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3074 Valid, 997 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-22 00:28:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-11-22 00:28:04,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 3311. [2022-11-22 00:28:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3311 states, 2810 states have (on average 1.0295373665480427) internal successors, (2893), 2801 states have internal predecessors, (2893), 48 states have call successors, (48), 47 states have call predecessors, (48), 451 states have return successors, (462), 462 states have call predecessors, (462), 47 states have call successors, (462) [2022-11-22 00:28:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3311 states to 3311 states and 3403 transitions. [2022-11-22 00:28:04,892 INFO L78 Accepts]: Start accepts. Automaton has 3311 states and 3403 transitions. Word has length 117 [2022-11-22 00:28:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:04,893 INFO L495 AbstractCegarLoop]: Abstraction has 3311 states and 3403 transitions. [2022-11-22 00:28:04,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.010752688172043) internal successors, (187), 50 states have internal predecessors, (187), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3311 states and 3403 transitions. [2022-11-22 00:28:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-22 00:28:04,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:04,896 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2022-11-22 00:28:04,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:05,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 00:28:05,102 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:28:05,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash 747703330, now seen corresponding path program 3 times [2022-11-22 00:28:05,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:05,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639940191] [2022-11-22 00:28:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:05,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-22 00:28:05,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:05,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639940191] [2022-11-22 00:28:05,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639940191] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:05,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525610560] [2022-11-22 00:28:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:28:05,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:05,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:05,676 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:05,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 00:28:05,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:28:05,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:28:05,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 00:28:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-22 00:28:05,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-11-22 00:28:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525610560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [432494451] [2022-11-22 00:28:11,455 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:28:11,455 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:11,455 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:28:11,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:11,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 47 [2022-11-22 00:28:11,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846590409] [2022-11-22 00:28:11,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-22 00:28:11,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-22 00:28:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:28:11,461 INFO L87 Difference]: Start difference. First operand 3311 states and 3403 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-22 00:28:11,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:11,716 INFO L93 Difference]: Finished difference Result 7200 states and 7855 transitions. [2022-11-22 00:28:11,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-22 00:28:11,717 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) Word has length 134 [2022-11-22 00:28:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:11,736 INFO L225 Difference]: With dead ends: 7200 [2022-11-22 00:28:11,736 INFO L226 Difference]: Without dead ends: 5849 [2022-11-22 00:28:11,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1657, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 00:28:11,742 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:11,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 122 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:28:11,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5849 states. [2022-11-22 00:28:11,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5849 to 5849. [2022-11-22 00:28:11,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4994 states have (on average 1.014217060472567) internal successors, (5065), 4973 states have internal predecessors, (5065), 48 states have call successors, (48), 47 states have call predecessors, (48), 805 states have return successors, (828), 828 states have call predecessors, (828), 47 states have call successors, (828) [2022-11-22 00:28:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 5941 transitions. [2022-11-22 00:28:11,906 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 5941 transitions. Word has length 134 [2022-11-22 00:28:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:11,907 INFO L495 AbstractCegarLoop]: Abstraction has 5849 states and 5941 transitions. [2022-11-22 00:28:11,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 48 states have internal predecessors, (141), 1 states have call successors, (2), 1 states have call predecessors, (2), 23 states have return successors, (23), 23 states have call predecessors, (23), 1 states have call successors, (23) [2022-11-22 00:28:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 5941 transitions. [2022-11-22 00:28:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-11-22 00:28:11,912 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:11,912 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1] [2022-11-22 00:28:11,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:12,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 00:28:12,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:28:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash 464473343, now seen corresponding path program 5 times [2022-11-22 00:28:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:12,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828375282] [2022-11-22 00:28:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:28:17,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828375282] [2022-11-22 00:28:17,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828375282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889547504] [2022-11-22 00:28:17,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:28:17,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:17,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:17,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:17,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 00:28:17,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2022-11-22 00:28:17,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:28:17,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-22 00:28:17,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:18,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:28:18,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:28:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:28:26,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889547504] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:28:26,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1210396875] [2022-11-22 00:28:26,191 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:28:26,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:28:26,192 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:28:26,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:28:26,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2022-11-22 00:28:26,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940060075] [2022-11-22 00:28:26,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:28:26,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-11-22 00:28:26,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:28:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-11-22 00:28:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2022-11-22 00:28:26,205 INFO L87 Difference]: Start difference. First operand 5849 states and 5941 transitions. Second operand has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:28:43,059 INFO L93 Difference]: Finished difference Result 13768 states and 13909 transitions. [2022-11-22 00:28:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 264 states. [2022-11-22 00:28:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-11-22 00:28:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:28:43,105 INFO L225 Difference]: With dead ends: 13768 [2022-11-22 00:28:43,106 INFO L226 Difference]: Without dead ends: 13767 [2022-11-22 00:28:43,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 377 SyntacticMatches, 1 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30092 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=37097, Invalid=89995, Unknown=0, NotChecked=0, Total=127092 [2022-11-22 00:28:43,123 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 6634 mSDsluCounter, 2141 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 1676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6636 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 3649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1676 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 00:28:43,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6636 Valid, 2280 Invalid, 3649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1676 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 00:28:43,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13767 states. [2022-11-22 00:28:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13767 to 13673. [2022-11-22 00:28:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13673 states, 11666 states have (on average 1.0143151037202125) internal successors, (11833), 11645 states have internal predecessors, (11833), 96 states have call successors, (96), 95 states have call predecessors, (96), 1909 states have return successors, (1932), 1932 states have call predecessors, (1932), 95 states have call successors, (1932) [2022-11-22 00:28:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13673 states to 13673 states and 13861 transitions. [2022-11-22 00:28:43,506 INFO L78 Accepts]: Start accepts. Automaton has 13673 states and 13861 transitions. Word has length 237 [2022-11-22 00:28:43,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:28:43,507 INFO L495 AbstractCegarLoop]: Abstraction has 13673 states and 13861 transitions. [2022-11-22 00:28:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.005291005291005) internal successors, (379), 98 states have internal predecessors, (379), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:28:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 13673 states and 13861 transitions. [2022-11-22 00:28:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-11-22 00:28:43,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:28:43,518 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2022-11-22 00:28:43,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 00:28:43,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:43,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:28:43,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:28:43,730 INFO L85 PathProgramCache]: Analyzing trace with hash -100933086, now seen corresponding path program 4 times [2022-11-22 00:28:43,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:28:43,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461404997] [2022-11-22 00:28:43,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:28:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:28:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:45,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-11-22 00:28:45,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:28:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461404997] [2022-11-22 00:28:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461404997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:28:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657262678] [2022-11-22 00:28:45,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:28:45,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:28:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:28:45,610 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:28:45,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 00:28:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:28:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-22 00:28:45,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:28:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-11-22 00:28:46,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:29:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3016 backedges. 0 proven. 1705 refuted. 0 times theorem prover too weak. 1311 trivial. 0 not checked. [2022-11-22 00:29:33,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657262678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:29:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1671096791] [2022-11-22 00:29:33,484 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:29:33,484 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:29:33,484 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:29:33,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:29:33,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 63 [2022-11-22 00:29:33,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287417100] [2022-11-22 00:29:33,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:29:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-22 00:29:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:29:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-22 00:29:33,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 00:29:33,488 INFO L87 Difference]: Start difference. First operand 13673 states and 13861 transitions. Second operand has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2022-11-22 00:29:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:29:33,806 INFO L93 Difference]: Finished difference Result 18954 states and 19901 transitions. [2022-11-22 00:29:33,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-22 00:29:33,807 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) Word has length 278 [2022-11-22 00:29:33,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:29:33,865 INFO L225 Difference]: With dead ends: 18954 [2022-11-22 00:29:33,866 INFO L226 Difference]: Without dead ends: 17493 [2022-11-22 00:29:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 507 SyntacticMatches, 32 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1055, Invalid=2977, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 00:29:33,878 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:29:33,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 100 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:29:33,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17493 states. [2022-11-22 00:29:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17493 to 17493. [2022-11-22 00:29:34,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17493 states, 14946 states have (on average 1.0106382978723405) internal successors, (15105), 14917 states have internal predecessors, (15105), 96 states have call successors, (96), 95 states have call predecessors, (96), 2449 states have return successors, (2480), 2480 states have call predecessors, (2480), 95 states have call successors, (2480) [2022-11-22 00:29:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17493 states to 17493 states and 17681 transitions. [2022-11-22 00:29:34,236 INFO L78 Accepts]: Start accepts. Automaton has 17493 states and 17681 transitions. Word has length 278 [2022-11-22 00:29:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:29:34,237 INFO L495 AbstractCegarLoop]: Abstraction has 17493 states and 17681 transitions. [2022-11-22 00:29:34,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.0634920634920637) internal successors, (193), 64 states have internal predecessors, (193), 1 states have call successors, (2), 1 states have call predecessors, (2), 31 states have return successors, (31), 31 states have call predecessors, (31), 1 states have call successors, (31) [2022-11-22 00:29:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 17493 states and 17681 transitions. [2022-11-22 00:29:34,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-11-22 00:29:34,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:29:34,254 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 1, 1, 1, 1, 1] [2022-11-22 00:29:34,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 00:29:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 00:29:34,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:29:34,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:29:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash -123746782, now seen corresponding path program 5 times [2022-11-22 00:29:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:29:34,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294244998] [2022-11-22 00:29:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:29:34,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:29:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:29:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-11-22 00:29:36,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:29:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294244998] [2022-11-22 00:29:36,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294244998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:29:36,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931272714] [2022-11-22 00:29:36,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 00:29:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:29:36,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:29:36,931 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:29:36,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 00:29:38,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2022-11-22 00:29:38,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:29:38,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 00:29:38,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:29:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 152 refuted. 0 times theorem prover too weak. 2235 trivial. 0 not checked. [2022-11-22 00:29:38,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:31:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 5552 backedges. 3165 proven. 1922 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2022-11-22 00:31:51,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931272714] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:31:51,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [620268826] [2022-11-22 00:31:51,592 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-22 00:31:51,592 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:31:51,592 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:31:51,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:31:51,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 67] total 68 [2022-11-22 00:31:51,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364821317] [2022-11-22 00:31:51,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:31:51,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-22 00:31:51,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:31:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-22 00:31:51,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3431, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 00:31:51,606 INFO L87 Difference]: Start difference. First operand 17493 states and 17681 transitions. Second operand has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-22 00:31:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:31:52,605 INFO L93 Difference]: Finished difference Result 17963 states and 18152 transitions. [2022-11-22 00:31:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-22 00:31:52,606 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) Word has length 374 [2022-11-22 00:31:52,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:31:52,612 INFO L225 Difference]: With dead ends: 17963 [2022-11-22 00:31:52,613 INFO L226 Difference]: Without dead ends: 479 [2022-11-22 00:31:52,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 712 SyntacticMatches, 35 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3269, Invalid=6631, Unknown=0, NotChecked=0, Total=9900 [2022-11-22 00:31:52,637 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 156 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 958 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 00:31:52,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 958 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 00:31:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-22 00:31:52,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 478. [2022-11-22 00:31:52,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 382 states have (on average 1.0026178010471205) internal successors, (383), 382 states have internal predecessors, (383), 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) [2022-11-22 00:31:52,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 478 transitions. [2022-11-22 00:31:52,665 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 478 transitions. Word has length 374 [2022-11-22 00:31:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:31:52,666 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 478 transitions. [2022-11-22 00:31:52,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 4.7164179104477615) internal successors, (316), 67 states have internal predecessors, (316), 33 states have call successors, (33), 2 states have call predecessors, (33), 31 states have return successors, (61), 31 states have call predecessors, (61), 32 states have call successors, (61) [2022-11-22 00:31:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 478 transitions. [2022-11-22 00:31:52,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2022-11-22 00:31:52,678 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:31:52,678 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1] [2022-11-22 00:31:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 00:31:52,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 00:31:52,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:31:52,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:31:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash -886767873, now seen corresponding path program 6 times [2022-11-22 00:31:52,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:31:52,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500767731] [2022-11-22 00:31:52,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:31:52,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:31:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:32:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:13,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:32:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500767731] [2022-11-22 00:32:13,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500767731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:32:13,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350053111] [2022-11-22 00:32:13,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 00:32:13,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:32:13,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:32:13,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:32:13,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 00:32:15,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 00:32:15,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 00:32:15,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 884 conjuncts, 192 conjunts are in the unsatisfiable core [2022-11-22 00:32:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:32:16,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:16,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:32:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:32:47,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350053111] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:32:47,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134859251] [2022-11-22 00:32:47,060 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:32:47,060 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:32:47,060 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:32:47,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:32:47,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2022-11-22 00:32:47,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253952339] [2022-11-22 00:32:47,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:32:47,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-11-22 00:32:47,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:32:47,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-11-22 00:32:47,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2022-11-22 00:32:47,084 INFO L87 Difference]: Start difference. First operand 478 states and 478 transitions. Second operand has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:26,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 00:33:26,599 INFO L93 Difference]: Finished difference Result 960 states and 1055 transitions. [2022-11-22 00:33:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-11-22 00:33:26,600 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 477 [2022-11-22 00:33:26,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 00:33:26,603 INFO L225 Difference]: With dead ends: 960 [2022-11-22 00:33:26,603 INFO L226 Difference]: Without dead ends: 959 [2022-11-22 00:33:26,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1334 GetRequests, 761 SyntacticMatches, 1 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 63.8s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2022-11-22 00:33:26,618 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 3821 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3821 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-22 00:33:26,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3821 Valid, 28 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-22 00:33:26,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-11-22 00:33:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2022-11-22 00:33:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 766 states have (on average 1.0013054830287207) internal successors, (767), 766 states have internal predecessors, (767), 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) [2022-11-22 00:33:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 958 transitions. [2022-11-22 00:33:26,671 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 958 transitions. Word has length 477 [2022-11-22 00:33:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 00:33:26,672 INFO L495 AbstractCegarLoop]: Abstraction has 958 states and 958 transitions. [2022-11-22 00:33:26,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.0026246719160103) internal successors, (763), 194 states have internal predecessors, (763), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 00:33:26,672 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 958 transitions. [2022-11-22 00:33:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2022-11-22 00:33:26,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 00:33:26,705 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1] [2022-11-22 00:33:26,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 00:33:26,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:33:26,920 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [hanoiErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, hanoiErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-11-22 00:33:26,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 00:33:26,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1002675457, now seen corresponding path program 7 times [2022-11-22 00:33:26,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 00:33:26,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862949177] [2022-11-22 00:33:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 00:33:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 00:33:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:09,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 00:35:09,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862949177] [2022-11-22 00:35:09,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862949177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 00:35:09,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972163993] [2022-11-22 00:35:09,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 00:35:09,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 00:35:09,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 [2022-11-22 00:35:09,324 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 00:35:09,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c9333a7e-dcc9-4820-9327-d8e092e49974/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 00:35:11,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 00:35:11,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 384 conjunts are in the unsatisfiable core [2022-11-22 00:35:11,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 00:35:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:35:13,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 00:37:17,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 00:37:17,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972163993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 00:37:17,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624224407] [2022-11-22 00:37:17,302 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 00:37:17,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 00:37:17,302 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:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-22 00:37:17,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 00:37:17,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2022-11-22 00:37:17,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551715355] [2022-11-22 00:37:17,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 00:37:17,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-11-22 00:37:17,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 00:37:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-11-22 00:37:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2022-11-22 00:37:17,379 INFO L87 Difference]: Start difference. First operand 958 states and 958 transitions. Second operand has 768 states, 765 states have (on average 2.0013071895424837) internal successors, (1531), 386 states have internal predecessors, (1531), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)