./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:26:10,458 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:26:10,578 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:26:10,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:26:10,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:26:10,634 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:26:10,637 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:26:10,637 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:26:10,638 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:26:10,638 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:26:10,639 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:26:10,639 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:26:10,639 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:26:10,640 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:26:10,640 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:26:10,640 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:26:10,641 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:26:10,641 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:26:10,641 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:26:10,642 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:26:10,646 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:26:10,647 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:26:10,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:26:10,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:26:10,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:26:10,649 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:26:10,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:26:10,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:26:10,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:26:10,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:26:10,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:26:10,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:26:10,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:26:10,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:26:10,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:26:10,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:26:10,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:26:10,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:26:10,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:26:10,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:26:10,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:26:10,659 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:26:10,660 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:26:10,660 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:26:10,661 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:26:10,661 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:26:10,662 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:26:10,662 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9cccea737f311e9e2585bb4c0fd7fa7e4382857df72468b846279ab5798480b [2024-11-09 06:26:11,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:26:11,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:26:11,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:26:11,049 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:26:11,051 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:26:11,053 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c Unable to find full path for "g++" [2024-11-09 06:26:13,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:26:13,516 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:26:13,518 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c [2024-11-09 06:26:13,528 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/data/444172365/b00265b582324fb7b779059d45f39993/FLAG669b57c60 [2024-11-09 06:26:13,551 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/data/444172365/b00265b582324fb7b779059d45f39993 [2024-11-09 06:26:13,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:26:13,555 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:26:13,557 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:26:13,558 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:26:13,564 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:26:13,567 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,569 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a5785c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13, skipping insertion in model container [2024-11-09 06:26:13,569 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,598 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:26:13,813 WARN L250 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_e0721348-bd2b-4187-9b7c-83a5ffb05b76/sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c[952,965] [2024-11-09 06:26:13,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:26:13,831 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:26:13,850 WARN L250 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_e0721348-bd2b-4187-9b7c-83a5ffb05b76/sv-benchmarks/c/recursive-simple/fibo_2calls_25-2.c[952,965] [2024-11-09 06:26:13,851 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:26:13,870 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:26:13,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13 WrapperNode [2024-11-09 06:26:13,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:26:13,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:26:13,873 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:26:13,873 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:26:13,882 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,909 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-11-09 06:26:13,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:26:13,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:26:13,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:26:13,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:26:13,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:26:13,935 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:26:13,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:26:13,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:26:13,936 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (1/1) ... [2024-11-09 06:26:13,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:26:13,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:13,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:26:13,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:26:14,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-11-09 06:26:14,056 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-11-09 06:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-11-09 06:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-11-09 06:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:26:14,140 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:26:14,143 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:26:14,365 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-11-09 06:26:14,365 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:26:14,394 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:26:14,394 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 06:26:14,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:26:14 BoogieIcfgContainer [2024-11-09 06:26:14,395 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:26:14,398 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:26:14,398 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:26:14,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:26:14,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:26:13" (1/3) ... [2024-11-09 06:26:14,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7bf2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:26:14, skipping insertion in model container [2024-11-09 06:26:14,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:26:13" (2/3) ... [2024-11-09 06:26:14,404 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c7bf2b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:26:14, skipping insertion in model container [2024-11-09 06:26:14,404 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:26:14" (3/3) ... [2024-11-09 06:26:14,405 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_25-2.c [2024-11-09 06:26:14,426 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:26:14,426 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 06:26:14,521 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:26:14,527 INFO L333 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, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@574d364d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:26:14,527 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 06:26:14,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-09 06:26:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 06:26:14,541 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:14,542 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:14,542 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:14,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:14,548 INFO L85 PathProgramCache]: Analyzing trace with hash -389521846, now seen corresponding path program 1 times [2024-11-09 06:26:14,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:14,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580381003] [2024-11-09 06:26:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:14,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:14,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:14,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580381003] [2024-11-09 06:26:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580381003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:14,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:14,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:26:14,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127157410] [2024-11-09 06:26:14,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:14,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:26:14,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:14,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:26:14,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:14,870 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:26:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:15,005 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2024-11-09 06:26:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:26:15,008 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-11-09 06:26:15,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:15,018 INFO L225 Difference]: With dead ends: 36 [2024-11-09 06:26:15,018 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:26:15,022 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:15,026 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:15,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 80 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:26:15,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:26:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-09 06:26:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 06:26:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-09 06:26:15,076 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 9 [2024-11-09 06:26:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:15,076 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-09 06:26:15,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:26:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-09 06:26:15,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-09 06:26:15,078 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:15,079 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:15,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:26:15,079 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:15,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1524884472, now seen corresponding path program 1 times [2024-11-09 06:26:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:15,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55801168] [2024-11-09 06:26:15,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:15,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:26:15,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55801168] [2024-11-09 06:26:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55801168] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:26:15,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:26:15,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850088627] [2024-11-09 06:26:15,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:15,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:26:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:15,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:26:15,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:15,266 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:26:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:15,383 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2024-11-09 06:26:15,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 06:26:15,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-11-09 06:26:15,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:15,386 INFO L225 Difference]: With dead ends: 32 [2024-11-09 06:26:15,386 INFO L226 Difference]: Without dead ends: 28 [2024-11-09 06:26:15,387 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:26:15,390 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:15,391 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 73 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:26:15,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-09 06:26:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-11-09 06:26:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2024-11-09 06:26:15,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2024-11-09 06:26:15,412 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 10 [2024-11-09 06:26:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:15,413 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2024-11-09 06:26:15,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-09 06:26:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2024-11-09 06:26:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 06:26:15,416 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:15,417 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:15,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:26:15,419 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:15,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:15,419 INFO L85 PathProgramCache]: Analyzing trace with hash 741502751, now seen corresponding path program 1 times [2024-11-09 06:26:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:15,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020780015] [2024-11-09 06:26:15,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:15,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:26:15,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:15,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020780015] [2024-11-09 06:26:15,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020780015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:15,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796250673] [2024-11-09 06:26:15,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:15,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:15,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:15,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:15,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:26:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:15,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:26:15,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:26:15,976 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 06:26:16,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796250673] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:16,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [993717988] [2024-11-09 06:26:16,365 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2024-11-09 06:26:16,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:16,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:26:16,378 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:26:16,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:26:16,539 INFO L197 IcfgInterpreter]: Interpreting procedure fibo1 with input of size 35 for LOIs [2024-11-09 06:26:16,629 INFO L197 IcfgInterpreter]: Interpreting procedure fibo2 with input of size 35 for LOIs [2024-11-09 06:26:16,642 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:26:17,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [993717988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:17,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:17,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 7, 7] total 17 [2024-11-09 06:26:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846111099] [2024-11-09 06:26:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:17,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:26:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:17,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:26:17,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:26:17,016 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:26:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:17,194 INFO L93 Difference]: Finished difference Result 68 states and 91 transitions. [2024-11-09 06:26:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:26:17,195 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-11-09 06:26:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:17,197 INFO L225 Difference]: With dead ends: 68 [2024-11-09 06:26:17,197 INFO L226 Difference]: Without dead ends: 44 [2024-11-09 06:26:17,198 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:26:17,199 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 16 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:17,200 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:26:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-09 06:26:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2024-11-09 06:26:17,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-09 06:26:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-11-09 06:26:17,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 22 [2024-11-09 06:26:17,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:17,216 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-11-09 06:26:17,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-09 06:26:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-11-09 06:26:17,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 06:26:17,221 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:17,221 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:17,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:17,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:17,426 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:17,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:17,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1754399412, now seen corresponding path program 1 times [2024-11-09 06:26:17,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:17,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764052942] [2024-11-09 06:26:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:17,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:26:17,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764052942] [2024-11-09 06:26:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764052942] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228674454] [2024-11-09 06:26:17,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:17,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:17,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:17,559 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:17,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:26:17,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:17,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:26:17,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:26:17,746 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:26:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228674454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1233460024] [2024-11-09 06:26:18,211 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:18,211 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:18,213 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:18,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:18,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 14 [2024-11-09 06:26:18,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029142010] [2024-11-09 06:26:18,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:18,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 06:26:18,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 06:26:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-09 06:26:18,219 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 06:26:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:18,496 INFO L93 Difference]: Finished difference Result 85 states and 121 transitions. [2024-11-09 06:26:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:26:18,498 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 35 [2024-11-09 06:26:18,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:18,501 INFO L225 Difference]: With dead ends: 85 [2024-11-09 06:26:18,502 INFO L226 Difference]: Without dead ends: 53 [2024-11-09 06:26:18,503 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:26:18,506 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:18,508 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 140 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:26:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-09 06:26:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-09 06:26:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2024-11-09 06:26:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-11-09 06:26:18,537 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2024-11-09 06:26:18,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:18,538 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-11-09 06:26:18,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 14 states have internal predecessors, (44), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 06:26:18,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-11-09 06:26:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-09 06:26:18,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:18,542 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:18,567 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:26:18,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:18,743 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:18,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2101254926, now seen corresponding path program 1 times [2024-11-09 06:26:18,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:18,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29526183] [2024-11-09 06:26:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:18,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 06:26:18,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:18,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29526183] [2024-11-09 06:26:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29526183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:18,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127415287] [2024-11-09 06:26:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:18,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:18,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:26:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:19,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:26:19,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 06:26:19,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:26:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127415287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:19,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1054652414] [2024-11-09 06:26:19,569 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:19,570 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:19,571 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:19,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:19,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 18 [2024-11-09 06:26:19,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327116034] [2024-11-09 06:26:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:19,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:26:19,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:26:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-11-09 06:26:19,578 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 06:26:20,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:20,098 INFO L93 Difference]: Finished difference Result 123 states and 210 transitions. [2024-11-09 06:26:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:26:20,099 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2024-11-09 06:26:20,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:20,102 INFO L225 Difference]: With dead ends: 123 [2024-11-09 06:26:20,102 INFO L226 Difference]: Without dead ends: 79 [2024-11-09 06:26:20,104 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2024-11-09 06:26:20,105 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:20,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 225 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:26:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-09 06:26:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-11-09 06:26:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.15) internal successors, (46), 43 states have internal predecessors, (46), 14 states have call successors, (14), 5 states have call predecessors, (14), 8 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-11-09 06:26:20,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 91 transitions. [2024-11-09 06:26:20,128 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 91 transitions. Word has length 36 [2024-11-09 06:26:20,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:20,128 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 91 transitions. [2024-11-09 06:26:20,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.0625) internal successors, (49), 18 states have internal predecessors, (49), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2024-11-09 06:26:20,129 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 91 transitions. [2024-11-09 06:26:20,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 06:26:20,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:20,131 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:20,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:20,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:20,333 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:20,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 644290867, now seen corresponding path program 1 times [2024-11-09 06:26:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805092302] [2024-11-09 06:26:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 06:26:20,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805092302] [2024-11-09 06:26:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805092302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963584731] [2024-11-09 06:26:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:20,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:20,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:20,546 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:20,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:26:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:20,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 06:26:20,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:26:20,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 06:26:21,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963584731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:21,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [858253016] [2024-11-09 06:26:21,424 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:21,424 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:21,425 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:21,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:21,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-11-09 06:26:21,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920100652] [2024-11-09 06:26:21,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:21,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 06:26:21,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:21,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 06:26:21,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:26:21,429 INFO L87 Difference]: Start difference. First operand 63 states and 91 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-09 06:26:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:21,766 INFO L93 Difference]: Finished difference Result 121 states and 210 transitions. [2024-11-09 06:26:21,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:26:21,767 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) Word has length 50 [2024-11-09 06:26:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:21,770 INFO L225 Difference]: With dead ends: 121 [2024-11-09 06:26:21,770 INFO L226 Difference]: Without dead ends: 99 [2024-11-09 06:26:21,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2024-11-09 06:26:21,772 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:21,773 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 147 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:26:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-09 06:26:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2024-11-09 06:26:21,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 49 states have internal predecessors, (52), 14 states have call successors, (14), 5 states have call predecessors, (14), 11 states have return successors, (39), 17 states have call predecessors, (39), 14 states have call successors, (39) [2024-11-09 06:26:21,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 105 transitions. [2024-11-09 06:26:21,797 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 105 transitions. Word has length 50 [2024-11-09 06:26:21,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:21,797 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 105 transitions. [2024-11-09 06:26:21,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 1 states have call predecessors, (14), 8 states have return successors, (18), 8 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-09 06:26:21,798 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 105 transitions. [2024-11-09 06:26:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-09 06:26:21,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:21,808 INFO L215 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:21,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:22,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:26:22,010 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:22,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash -988387816, now seen corresponding path program 1 times [2024-11-09 06:26:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:22,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914153244] [2024-11-09 06:26:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:22,403 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 59 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-09 06:26:22,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:22,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914153244] [2024-11-09 06:26:22,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914153244] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:22,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70201353] [2024-11-09 06:26:22,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:22,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:22,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:22,406 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:22,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:26:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:22,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:26:22,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-09 06:26:22,706 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 06:26:23,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70201353] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:23,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1255676352] [2024-11-09 06:26:23,939 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:23,939 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:23,939 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:23,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:23,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 23 [2024-11-09 06:26:23,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090351760] [2024-11-09 06:26:23,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:23,942 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:26:23,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:23,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:26:23,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:26:23,945 INFO L87 Difference]: Start difference. First operand 72 states and 105 transitions. Second operand has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-09 06:26:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:24,872 INFO L93 Difference]: Finished difference Result 206 states and 415 transitions. [2024-11-09 06:26:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 06:26:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) Word has length 92 [2024-11-09 06:26:24,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:24,877 INFO L225 Difference]: With dead ends: 206 [2024-11-09 06:26:24,877 INFO L226 Difference]: Without dead ends: 117 [2024-11-09 06:26:24,880 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 167 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:26:24,881 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:24,881 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 346 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:26:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-09 06:26:24,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2024-11-09 06:26:24,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 19 states have call successors, (19), 8 states have call predecessors, (19), 15 states have return successors, (51), 23 states have call predecessors, (51), 19 states have call successors, (51) [2024-11-09 06:26:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 146 transitions. [2024-11-09 06:26:24,907 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 146 transitions. Word has length 92 [2024-11-09 06:26:24,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:24,907 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 146 transitions. [2024-11-09 06:26:24,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 23 states have internal predecessors, (75), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 10 states have call predecessors, (27), 18 states have call successors, (27) [2024-11-09 06:26:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 146 transitions. [2024-11-09 06:26:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-11-09 06:26:24,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:24,911 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 9, 9, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:24,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:26:25,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:25,116 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:25,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:25,117 INFO L85 PathProgramCache]: Analyzing trace with hash -280847514, now seen corresponding path program 2 times [2024-11-09 06:26:25,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:25,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645234598] [2024-11-09 06:26:25,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:25,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 39 proven. 116 refuted. 0 times theorem prover too weak. 373 trivial. 0 not checked. [2024-11-09 06:26:25,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:25,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645234598] [2024-11-09 06:26:25,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645234598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092287028] [2024-11-09 06:26:25,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:26:25,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:25,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:25,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:25,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:26:25,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 06:26:25,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:25,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 06:26:25,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-09 06:26:25,410 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:26:25,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092287028] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:26:25,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:26:25,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2024-11-09 06:26:25,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090404199] [2024-11-09 06:26:25,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:26:25,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:26:25,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:26:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:25,413 INFO L87 Difference]: Start difference. First operand 100 states and 146 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:26:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:25,479 INFO L93 Difference]: Finished difference Result 190 states and 311 transitions. [2024-11-09 06:26:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:26:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 142 [2024-11-09 06:26:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:25,481 INFO L225 Difference]: With dead ends: 190 [2024-11-09 06:26:25,482 INFO L226 Difference]: Without dead ends: 100 [2024-11-09 06:26:25,483 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:26:25,484 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:25,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-09 06:26:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-09 06:26:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2024-11-09 06:26:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 65 states have (on average 1.1692307692307693) internal successors, (76), 68 states have internal predecessors, (76), 19 states have call successors, (19), 8 states have call predecessors, (19), 15 states have return successors, (48), 23 states have call predecessors, (48), 19 states have call successors, (48) [2024-11-09 06:26:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 143 transitions. [2024-11-09 06:26:25,508 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 143 transitions. Word has length 142 [2024-11-09 06:26:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:25,509 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 143 transitions. [2024-11-09 06:26:25,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 06:26:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 143 transitions. [2024-11-09 06:26:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 06:26:25,512 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:25,512 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 11, 11, 11, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:25,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:26:25,715 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:25,716 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:25,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash 175421652, now seen corresponding path program 3 times [2024-11-09 06:26:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694192569] [2024-11-09 06:26:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:25,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 54 proven. 198 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-11-09 06:26:26,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694192569] [2024-11-09 06:26:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694192569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057227568] [2024-11-09 06:26:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:26:26,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:26,081 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:26,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:26:26,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:26:26,201 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:26,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 06:26:26,210 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 315 proven. 6 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-09 06:26:26,309 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 791 backedges. 69 proven. 184 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2024-11-09 06:26:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057227568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1581854022] [2024-11-09 06:26:27,217 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:27,217 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:27,218 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:27,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:27,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-11-09 06:26:27,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659297893] [2024-11-09 06:26:27,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:27,224 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 06:26:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:27,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 06:26:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-11-09 06:26:27,225 INFO L87 Difference]: Start difference. First operand 100 states and 143 transitions. Second operand has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 12 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 12 states have call successors, (27) [2024-11-09 06:26:27,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:27,885 INFO L93 Difference]: Finished difference Result 222 states and 343 transitions. [2024-11-09 06:26:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:26:27,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 12 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 12 states have call successors, (27) Word has length 172 [2024-11-09 06:26:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:27,888 INFO L225 Difference]: With dead ends: 222 [2024-11-09 06:26:27,888 INFO L226 Difference]: Without dead ends: 132 [2024-11-09 06:26:27,890 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 335 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-11-09 06:26:27,890 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:27,891 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 237 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:26:27,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-09 06:26:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 95. [2024-11-09 06:26:27,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 19 states have call successors, (19), 8 states have call predecessors, (19), 13 states have return successors, (43), 22 states have call predecessors, (43), 19 states have call successors, (43) [2024-11-09 06:26:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 135 transitions. [2024-11-09 06:26:27,930 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 135 transitions. Word has length 172 [2024-11-09 06:26:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:27,931 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 135 transitions. [2024-11-09 06:26:27,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.411764705882353) internal successors, (75), 18 states have internal predecessors, (75), 12 states have call successors, (22), 2 states have call predecessors, (22), 9 states have return successors, (27), 9 states have call predecessors, (27), 12 states have call successors, (27) [2024-11-09 06:26:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 135 transitions. [2024-11-09 06:26:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-09 06:26:27,934 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:27,934 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 10, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:27,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:26:28,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:28,140 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:28,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -225787115, now seen corresponding path program 1 times [2024-11-09 06:26:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:28,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517983830] [2024-11-09 06:26:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 67 proven. 171 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-09 06:26:28,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517983830] [2024-11-09 06:26:28,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517983830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:28,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210245195] [2024-11-09 06:26:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:28,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:28,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:28,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:28,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:26:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:28,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:26:28,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 30 proven. 250 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2024-11-09 06:26:28,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 30 proven. 266 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2024-11-09 06:26:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210245195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1876853490] [2024-11-09 06:26:30,707 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:30,708 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:30,708 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:30,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:30,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 15] total 25 [2024-11-09 06:26:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259652866] [2024-11-09 06:26:30,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:30,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 06:26:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 06:26:30,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:26:30,713 INFO L87 Difference]: Start difference. First operand 95 states and 135 transitions. Second operand has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 25 states have internal predecessors, (81), 20 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (32), 11 states have call predecessors, (32), 20 states have call successors, (32) [2024-11-09 06:26:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:31,635 INFO L93 Difference]: Finished difference Result 250 states and 437 transitions. [2024-11-09 06:26:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 06:26:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 25 states have internal predecessors, (81), 20 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (32), 11 states have call predecessors, (32), 20 states have call successors, (32) Word has length 160 [2024-11-09 06:26:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:31,639 INFO L225 Difference]: With dead ends: 250 [2024-11-09 06:26:31,639 INFO L226 Difference]: Without dead ends: 135 [2024-11-09 06:26:31,641 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 300 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=321, Invalid=1571, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:26:31,642 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 104 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:31,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 362 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:26:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-09 06:26:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2024-11-09 06:26:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 78 states have internal predecessors, (92), 23 states have call successors, (23), 11 states have call predecessors, (23), 15 states have return successors, (56), 25 states have call predecessors, (56), 23 states have call successors, (56) [2024-11-09 06:26:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 171 transitions. [2024-11-09 06:26:31,670 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 171 transitions. Word has length 160 [2024-11-09 06:26:31,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:31,671 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 171 transitions. [2024-11-09 06:26:31,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 25 states have internal predecessors, (81), 20 states have call successors, (26), 1 states have call predecessors, (26), 10 states have return successors, (32), 11 states have call predecessors, (32), 20 states have call successors, (32) [2024-11-09 06:26:31,671 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 171 transitions. [2024-11-09 06:26:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-11-09 06:26:31,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:31,676 INFO L215 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 15, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 6, 5, 5, 3, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:31,701 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:26:31,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:31,881 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:31,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:31,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1601843718, now seen corresponding path program 4 times [2024-11-09 06:26:31,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:31,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984726314] [2024-11-09 06:26:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:31,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 138 proven. 287 refuted. 0 times theorem prover too weak. 1355 trivial. 0 not checked. [2024-11-09 06:26:32,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:32,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984726314] [2024-11-09 06:26:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984726314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834703455] [2024-11-09 06:26:32,331 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:26:32,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:32,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:32,333 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:32,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:26:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:32,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:26:32,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 89 proven. 482 refuted. 0 times theorem prover too weak. 1209 trivial. 0 not checked. [2024-11-09 06:26:32,691 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1780 backedges. 89 proven. 506 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2024-11-09 06:26:35,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834703455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [808340512] [2024-11-09 06:26:35,228 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:35,228 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:35,228 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:35,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:35,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 17] total 23 [2024-11-09 06:26:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683781905] [2024-11-09 06:26:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:35,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 06:26:35,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 06:26:35,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2024-11-09 06:26:35,233 INFO L87 Difference]: Start difference. First operand 115 states and 171 transitions. Second operand has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 19 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) [2024-11-09 06:26:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:35,607 INFO L93 Difference]: Finished difference Result 165 states and 290 transitions. [2024-11-09 06:26:35,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:26:35,608 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 19 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) Word has length 254 [2024-11-09 06:26:35,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:35,614 INFO L225 Difference]: With dead ends: 165 [2024-11-09 06:26:35,614 INFO L226 Difference]: Without dead ends: 141 [2024-11-09 06:26:35,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 491 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2024-11-09 06:26:35,617 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:35,618 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 157 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:26:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-09 06:26:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2024-11-09 06:26:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 83 states have (on average 1.1927710843373494) internal successors, (99), 85 states have internal predecessors, (99), 24 states have call successors, (24), 11 states have call predecessors, (24), 18 states have return successors, (65), 29 states have call predecessors, (65), 24 states have call successors, (65) [2024-11-09 06:26:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 188 transitions. [2024-11-09 06:26:35,674 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 188 transitions. Word has length 254 [2024-11-09 06:26:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:35,675 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 188 transitions. [2024-11-09 06:26:35,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.6666666666666665) internal successors, (77), 23 states have internal predecessors, (77), 19 states have call successors, (23), 1 states have call predecessors, (23), 11 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) [2024-11-09 06:26:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 188 transitions. [2024-11-09 06:26:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2024-11-09 06:26:35,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:35,701 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 51, 51, 42, 41, 27, 27, 27, 27, 27, 27, 27, 25, 25, 25, 25, 25, 25, 25, 17, 14, 12, 10, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:35,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 06:26:35,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:35,903 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:35,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:35,903 INFO L85 PathProgramCache]: Analyzing trace with hash -529100490, now seen corresponding path program 5 times [2024-11-09 06:26:35,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:35,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453226053] [2024-11-09 06:26:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:35,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 15109 backedges. 273 proven. 1874 refuted. 0 times theorem prover too weak. 12962 trivial. 0 not checked. [2024-11-09 06:26:37,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453226053] [2024-11-09 06:26:37,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453226053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:37,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586479085] [2024-11-09 06:26:37,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:26:37,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:37,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:37,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:26:37,762 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-09 06:26:37,762 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:37,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 06:26:37,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15109 backedges. 2505 proven. 34 refuted. 0 times theorem prover too weak. 12570 trivial. 0 not checked. [2024-11-09 06:26:37,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15109 backedges. 1749 proven. 73 refuted. 0 times theorem prover too weak. 13287 trivial. 0 not checked. [2024-11-09 06:26:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586479085] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:41,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [781949641] [2024-11-09 06:26:41,125 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:41,125 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:41,126 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:41,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:41,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2024-11-09 06:26:41,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528272015] [2024-11-09 06:26:41,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:41,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-09 06:26:41,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:41,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-09 06:26:41,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-11-09 06:26:41,132 INFO L87 Difference]: Start difference. First operand 126 states and 188 transitions. Second operand has 24 states, 23 states have (on average 4.086956521739131) internal successors, (94), 24 states have internal predecessors, (94), 19 states have call successors, (28), 2 states have call predecessors, (28), 13 states have return successors, (37), 14 states have call predecessors, (37), 19 states have call successors, (37) [2024-11-09 06:26:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:42,138 INFO L93 Difference]: Finished difference Result 310 states and 567 transitions. [2024-11-09 06:26:42,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:26:42,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.086956521739131) internal successors, (94), 24 states have internal predecessors, (94), 19 states have call successors, (28), 2 states have call predecessors, (28), 13 states have return successors, (37), 14 states have call predecessors, (37), 19 states have call successors, (37) Word has length 716 [2024-11-09 06:26:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:42,144 INFO L225 Difference]: With dead ends: 310 [2024-11-09 06:26:42,144 INFO L226 Difference]: Without dead ends: 182 [2024-11-09 06:26:42,147 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1476 GetRequests, 1421 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2024-11-09 06:26:42,148 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:42,148 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 260 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 06:26:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-09 06:26:42,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 155. [2024-11-09 06:26:42,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 105 states have internal predecessors, (122), 31 states have call successors, (31), 17 states have call predecessors, (31), 19 states have return successors, (96), 32 states have call predecessors, (96), 31 states have call successors, (96) [2024-11-09 06:26:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 249 transitions. [2024-11-09 06:26:42,193 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 249 transitions. Word has length 716 [2024-11-09 06:26:42,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:42,194 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 249 transitions. [2024-11-09 06:26:42,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.086956521739131) internal successors, (94), 24 states have internal predecessors, (94), 19 states have call successors, (28), 2 states have call predecessors, (28), 13 states have return successors, (37), 14 states have call predecessors, (37), 19 states have call successors, (37) [2024-11-09 06:26:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 249 transitions. [2024-11-09 06:26:42,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2024-11-09 06:26:42,220 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:42,220 INFO L215 NwaCegarLoop]: trace histogram [57, 57, 50, 50, 43, 43, 28, 28, 28, 28, 28, 28, 28, 25, 25, 25, 25, 25, 25, 25, 18, 15, 14, 7, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:42,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 06:26:42,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:42,425 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:42,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:42,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1703630143, now seen corresponding path program 6 times [2024-11-09 06:26:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695105573] [2024-11-09 06:26:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:42,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:42,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 15802 backedges. 389 proven. 1546 refuted. 0 times theorem prover too weak. 13867 trivial. 0 not checked. [2024-11-09 06:26:43,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695105573] [2024-11-09 06:26:43,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695105573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:43,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958088096] [2024-11-09 06:26:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:26:43,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:43,691 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:43,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:26:44,053 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:26:44,053 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:44,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 06:26:44,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 15802 backedges. 3872 proven. 68 refuted. 0 times theorem prover too weak. 11862 trivial. 0 not checked. [2024-11-09 06:26:44,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15802 backedges. 437 proven. 1961 refuted. 0 times theorem prover too weak. 13404 trivial. 0 not checked. [2024-11-09 06:26:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958088096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:47,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [236449466] [2024-11-09 06:26:47,824 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:47,824 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:47,824 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:47,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:47,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15] total 25 [2024-11-09 06:26:47,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928235141] [2024-11-09 06:26:47,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:47,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-09 06:26:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-09 06:26:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:26:47,831 INFO L87 Difference]: Start difference. First operand 155 states and 249 transitions. Second operand has 25 states, 24 states have (on average 4.125) internal successors, (99), 25 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (38), 13 states have call predecessors, (38), 20 states have call successors, (38) [2024-11-09 06:26:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:48,959 INFO L93 Difference]: Finished difference Result 353 states and 669 transitions. [2024-11-09 06:26:48,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-09 06:26:48,960 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 25 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (38), 13 states have call predecessors, (38), 20 states have call successors, (38) Word has length 731 [2024-11-09 06:26:48,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:48,964 INFO L225 Difference]: With dead ends: 353 [2024-11-09 06:26:48,965 INFO L226 Difference]: Without dead ends: 208 [2024-11-09 06:26:48,968 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1505 GetRequests, 1447 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=2328, Unknown=0, NotChecked=0, Total=2756 [2024-11-09 06:26:48,969 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 109 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:48,969 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 336 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:26:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-11-09 06:26:48,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2024-11-09 06:26:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 111 states have (on average 1.162162162162162) internal successors, (129), 111 states have internal predecessors, (129), 32 states have call successors, (32), 19 states have call predecessors, (32), 20 states have return successors, (90), 33 states have call predecessors, (90), 32 states have call successors, (90) [2024-11-09 06:26:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 251 transitions. [2024-11-09 06:26:49,000 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 251 transitions. Word has length 731 [2024-11-09 06:26:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:49,000 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 251 transitions. [2024-11-09 06:26:49,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.125) internal successors, (99), 25 states have internal predecessors, (99), 20 states have call successors, (30), 2 states have call predecessors, (30), 13 states have return successors, (38), 13 states have call predecessors, (38), 20 states have call successors, (38) [2024-11-09 06:26:49,001 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 251 transitions. [2024-11-09 06:26:49,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 624 [2024-11-09 06:26:49,007 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:49,007 INFO L215 NwaCegarLoop]: trace histogram [47, 47, 44, 44, 38, 36, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 16, 13, 9, 8, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:49,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:26:49,211 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 06:26:49,212 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:49,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:49,212 INFO L85 PathProgramCache]: Analyzing trace with hash -177719005, now seen corresponding path program 7 times [2024-11-09 06:26:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763497333] [2024-11-09 06:26:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:50,211 INFO L134 CoverageAnalysis]: Checked inductivity of 11377 backedges. 395 proven. 1229 refuted. 0 times theorem prover too weak. 9753 trivial. 0 not checked. [2024-11-09 06:26:50,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763497333] [2024-11-09 06:26:50,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763497333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:50,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989482410] [2024-11-09 06:26:50,212 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:26:50,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:50,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:50,214 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:50,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:26:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:50,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 1404 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 06:26:50,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 11377 backedges. 279 proven. 1784 refuted. 0 times theorem prover too weak. 9314 trivial. 0 not checked. [2024-11-09 06:26:50,777 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:26:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11377 backedges. 279 proven. 1828 refuted. 0 times theorem prover too weak. 9270 trivial. 0 not checked. [2024-11-09 06:26:56,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989482410] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:26:56,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438534006] [2024-11-09 06:26:56,245 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:26:56,246 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:26:56,246 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:26:56,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:26:56,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 21] total 28 [2024-11-09 06:26:56,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650510836] [2024-11-09 06:26:56,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:26:56,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:26:56,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:26:56,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:26:56,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-09 06:26:56,251 INFO L87 Difference]: Start difference. First operand 164 states and 251 transitions. Second operand has 28 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 28 states have internal predecessors, (92), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-09 06:26:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:26:56,713 INFO L93 Difference]: Finished difference Result 226 states and 425 transitions. [2024-11-09 06:26:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 06:26:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 28 states have internal predecessors, (92), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) Word has length 623 [2024-11-09 06:26:56,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:26:56,722 INFO L225 Difference]: With dead ends: 226 [2024-11-09 06:26:56,723 INFO L226 Difference]: Without dead ends: 202 [2024-11-09 06:26:56,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1273 GetRequests, 1226 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-11-09 06:26:56,725 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:26:56,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 221 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:26:56,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-09 06:26:56,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 187. [2024-11-09 06:26:56,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 125 states have (on average 1.144) internal successors, (143), 125 states have internal predecessors, (143), 36 states have call successors, (36), 19 states have call predecessors, (36), 25 states have return successors, (128), 42 states have call predecessors, (128), 36 states have call successors, (128) [2024-11-09 06:26:56,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 307 transitions. [2024-11-09 06:26:56,767 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 307 transitions. Word has length 623 [2024-11-09 06:26:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:26:56,768 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 307 transitions. [2024-11-09 06:26:56,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 28 states have internal predecessors, (92), 24 states have call successors, (28), 1 states have call predecessors, (28), 14 states have return successors, (39), 15 states have call predecessors, (39), 24 states have call successors, (39) [2024-11-09 06:26:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 307 transitions. [2024-11-09 06:26:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1236 [2024-11-09 06:26:56,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:26:56,784 INFO L215 NwaCegarLoop]: trace histogram [91, 91, 90, 90, 74, 72, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 45, 29, 27, 18, 17, 1, 1, 1, 1, 1, 1] [2024-11-09 06:26:56,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:26:56,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:56,985 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:26:56,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:26:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash -473978396, now seen corresponding path program 8 times [2024-11-09 06:26:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:26:56,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489857297] [2024-11-09 06:26:56,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:26:56,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:26:57,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:26:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 45577 backedges. 799 proven. 3040 refuted. 0 times theorem prover too weak. 41738 trivial. 0 not checked. [2024-11-09 06:26:59,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:26:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489857297] [2024-11-09 06:26:59,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489857297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:26:59,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227965913] [2024-11-09 06:26:59,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:26:59,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:26:59,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:26:59,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:26:59,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:26:59,706 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-09 06:26:59,707 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:26:59,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:26:59,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:26:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 45577 backedges. 3778 proven. 146 refuted. 0 times theorem prover too weak. 41653 trivial. 0 not checked. [2024-11-09 06:26:59,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 45577 backedges. 3778 proven. 152 refuted. 0 times theorem prover too weak. 41647 trivial. 0 not checked. [2024-11-09 06:27:05,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227965913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [241364984] [2024-11-09 06:27:05,025 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:27:05,025 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:05,025 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:27:05,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:05,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 17] total 28 [2024-11-09 06:27:05,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903432118] [2024-11-09 06:27:05,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:05,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:27:05,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:05,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:27:05,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2024-11-09 06:27:05,031 INFO L87 Difference]: Start difference. First operand 187 states and 307 transitions. Second operand has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 19 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) [2024-11-09 06:27:06,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:06,423 INFO L93 Difference]: Finished difference Result 532 states and 1110 transitions. [2024-11-09 06:27:06,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-09 06:27:06,424 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 19 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) Word has length 1235 [2024-11-09 06:27:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:06,433 INFO L225 Difference]: With dead ends: 532 [2024-11-09 06:27:06,433 INFO L226 Difference]: Without dead ends: 344 [2024-11-09 06:27:06,438 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2519 GetRequests, 2453 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=3017, Unknown=0, NotChecked=0, Total=3540 [2024-11-09 06:27:06,438 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 144 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:06,439 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 342 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:27:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-09 06:27:06,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 257. [2024-11-09 06:27:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 175 states have (on average 1.1371428571428572) internal successors, (199), 173 states have internal predecessors, (199), 52 states have call successors, (52), 32 states have call predecessors, (52), 29 states have return successors, (207), 51 states have call predecessors, (207), 52 states have call successors, (207) [2024-11-09 06:27:06,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 458 transitions. [2024-11-09 06:27:06,485 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 458 transitions. Word has length 1235 [2024-11-09 06:27:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:06,486 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 458 transitions. [2024-11-09 06:27:06,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.6296296296296298) internal successors, (98), 28 states have internal predecessors, (98), 19 states have call successors, (29), 1 states have call predecessors, (29), 15 states have return successors, (39), 20 states have call predecessors, (39), 19 states have call successors, (39) [2024-11-09 06:27:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 458 transitions. [2024-11-09 06:27:06,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1619 [2024-11-09 06:27:06,511 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:06,512 INFO L215 NwaCegarLoop]: trace histogram [122, 122, 115, 115, 98, 95, 61, 61, 61, 61, 61, 61, 61, 57, 57, 57, 57, 57, 57, 57, 41, 34, 24, 20, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:06,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:27:06,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 06:27:06,713 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:06,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1492490114, now seen corresponding path program 9 times [2024-11-09 06:27:06,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:06,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920278106] [2024-11-09 06:27:06,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 78666 backedges. 790 proven. 4309 refuted. 0 times theorem prover too weak. 73567 trivial. 0 not checked. [2024-11-09 06:27:10,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:10,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920278106] [2024-11-09 06:27:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920278106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:10,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156643196] [2024-11-09 06:27:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:27:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:10,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:10,035 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:27:10,647 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:27:10,648 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:10,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 2879 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 06:27:10,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 78666 backedges. 13887 proven. 176 refuted. 0 times theorem prover too weak. 64603 trivial. 0 not checked. [2024-11-09 06:27:10,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 78666 backedges. 856 proven. 5993 refuted. 0 times theorem prover too weak. 71817 trivial. 0 not checked. [2024-11-09 06:27:18,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156643196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:18,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617071122] [2024-11-09 06:27:18,654 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:27:18,655 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:18,655 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:27:18,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 19] total 29 [2024-11-09 06:27:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459003704] [2024-11-09 06:27:18,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:18,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-09 06:27:18,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-09 06:27:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-11-09 06:27:18,662 INFO L87 Difference]: Start difference. First operand 257 states and 458 transitions. Second operand has 29 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 29 states have internal predecessors, (111), 24 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (44), 15 states have call predecessors, (44), 24 states have call successors, (44) [2024-11-09 06:27:19,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:19,907 INFO L93 Difference]: Finished difference Result 668 states and 1628 transitions. [2024-11-09 06:27:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-09 06:27:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 29 states have internal predecessors, (111), 24 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (44), 15 states have call predecessors, (44), 24 states have call successors, (44) Word has length 1618 [2024-11-09 06:27:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:19,919 INFO L225 Difference]: With dead ends: 668 [2024-11-09 06:27:19,919 INFO L226 Difference]: Without dead ends: 421 [2024-11-09 06:27:19,926 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3288 GetRequests, 3217 SyntacticMatches, 9 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2024-11-09 06:27:19,927 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 145 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:19,927 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 400 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:27:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-09 06:27:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 367. [2024-11-09 06:27:19,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 256 states have (on average 1.1015625) internal successors, (282), 247 states have internal predecessors, (282), 75 states have call successors, (75), 55 states have call predecessors, (75), 35 states have return successors, (359), 64 states have call predecessors, (359), 75 states have call successors, (359) [2024-11-09 06:27:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 716 transitions. [2024-11-09 06:27:19,995 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 716 transitions. Word has length 1618 [2024-11-09 06:27:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:19,996 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 716 transitions. [2024-11-09 06:27:19,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 29 states have internal predecessors, (111), 24 states have call successors, (34), 2 states have call predecessors, (34), 15 states have return successors, (44), 15 states have call predecessors, (44), 24 states have call successors, (44) [2024-11-09 06:27:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 716 transitions. [2024-11-09 06:27:20,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1645 [2024-11-09 06:27:20,023 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:20,024 INFO L215 NwaCegarLoop]: trace histogram [122, 122, 119, 119, 98, 97, 61, 61, 61, 61, 61, 61, 61, 59, 59, 59, 59, 59, 59, 59, 39, 36, 24, 22, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:20,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:20,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:27:20,224 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:20,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:20,225 INFO L85 PathProgramCache]: Analyzing trace with hash 611401642, now seen corresponding path program 10 times [2024-11-09 06:27:20,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:20,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10979162] [2024-11-09 06:27:20,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:20,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 81181 backedges. 749 proven. 5729 refuted. 0 times theorem prover too weak. 74703 trivial. 0 not checked. [2024-11-09 06:27:23,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10979162] [2024-11-09 06:27:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10979162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:23,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474638189] [2024-11-09 06:27:23,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:27:23,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:23,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:23,855 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:23,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:27:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:24,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 3671 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:27:24,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 81181 backedges. 749 proven. 5729 refuted. 0 times theorem prover too weak. 74703 trivial. 0 not checked. [2024-11-09 06:27:24,848 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:34,272 INFO L134 CoverageAnalysis]: Checked inductivity of 81181 backedges. 749 proven. 5785 refuted. 0 times theorem prover too weak. 74647 trivial. 0 not checked. [2024-11-09 06:27:34,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474638189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:34,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422418383] [2024-11-09 06:27:34,275 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:27:34,275 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:34,276 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:27:34,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:34,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 23] total 26 [2024-11-09 06:27:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598039076] [2024-11-09 06:27:34,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:34,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 06:27:34,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:34,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 06:27:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:27:34,283 INFO L87 Difference]: Start difference. First operand 367 states and 716 transitions. Second operand has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 26 states have internal predecessors, (86), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2024-11-09 06:27:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:34,811 INFO L93 Difference]: Finished difference Result 399 states and 808 transitions. [2024-11-09 06:27:34,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:27:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 26 states have internal predecessors, (86), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) Word has length 1644 [2024-11-09 06:27:34,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:34,823 INFO L225 Difference]: With dead ends: 399 [2024-11-09 06:27:34,824 INFO L226 Difference]: Without dead ends: 385 [2024-11-09 06:27:34,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3318 GetRequests, 3275 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=967, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:27:34,826 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 105 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:34,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 227 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:27:34,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-09 06:27:34,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 367. [2024-11-09 06:27:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 256 states have (on average 1.1015625) internal successors, (282), 247 states have internal predecessors, (282), 75 states have call successors, (75), 55 states have call predecessors, (75), 35 states have return successors, (359), 64 states have call predecessors, (359), 75 states have call successors, (359) [2024-11-09 06:27:34,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 716 transitions. [2024-11-09 06:27:34,888 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 716 transitions. Word has length 1644 [2024-11-09 06:27:34,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:34,890 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 716 transitions. [2024-11-09 06:27:34,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.5833333333333335) internal successors, (86), 26 states have internal predecessors, (86), 23 states have call successors, (26), 1 states have call predecessors, (26), 11 states have return successors, (33), 11 states have call predecessors, (33), 23 states have call successors, (33) [2024-11-09 06:27:34,890 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 716 transitions. [2024-11-09 06:27:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2122 [2024-11-09 06:27:34,929 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:34,930 INFO L215 NwaCegarLoop]: trace histogram [158, 158, 153, 153, 129, 123, 79, 79, 79, 79, 79, 79, 79, 76, 76, 76, 76, 76, 76, 76, 53, 44, 30, 29, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:34,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 06:27:35,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:27:35,131 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:35,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:35,132 INFO L85 PathProgramCache]: Analyzing trace with hash -300634601, now seen corresponding path program 11 times [2024-11-09 06:27:35,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:35,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160084454] [2024-11-09 06:27:35,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:35,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 135607 backedges. 1042 proven. 6536 refuted. 0 times theorem prover too weak. 128029 trivial. 0 not checked. [2024-11-09 06:27:39,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160084454] [2024-11-09 06:27:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160084454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:39,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341744013] [2024-11-09 06:27:39,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:27:39,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:39,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:39,400 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:39,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 06:27:39,893 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-09 06:27:39,893 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:39,896 INFO L255 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 06:27:39,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 135607 backedges. 7139 proven. 86 refuted. 0 times theorem prover too weak. 128382 trivial. 0 not checked. [2024-11-09 06:27:40,131 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:27:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 135607 backedges. 7139 proven. 92 refuted. 0 times theorem prover too weak. 128376 trivial. 0 not checked. [2024-11-09 06:27:48,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341744013] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:27:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [554154949] [2024-11-09 06:27:48,615 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:27:48,615 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:27:48,616 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:27:48,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:27:48,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 17] total 28 [2024-11-09 06:27:48,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573466236] [2024-11-09 06:27:48,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:27:48,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-09 06:27:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:27:48,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-09 06:27:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2024-11-09 06:27:48,623 INFO L87 Difference]: Start difference. First operand 367 states and 716 transitions. Second operand has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 28 states have internal predecessors, (97), 21 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (38), 17 states have call predecessors, (38), 21 states have call successors, (38) [2024-11-09 06:27:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:27:49,988 INFO L93 Difference]: Finished difference Result 787 states and 1755 transitions. [2024-11-09 06:27:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-09 06:27:49,989 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 28 states have internal predecessors, (97), 21 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (38), 17 states have call predecessors, (38), 21 states have call successors, (38) Word has length 2121 [2024-11-09 06:27:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:27:49,999 INFO L225 Difference]: With dead ends: 787 [2024-11-09 06:27:49,999 INFO L226 Difference]: Without dead ends: 430 [2024-11-09 06:27:50,006 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4294 GetRequests, 4227 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=3123, Unknown=0, NotChecked=0, Total=3660 [2024-11-09 06:27:50,007 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 167 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:27:50,007 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 374 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:27:50,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-09 06:27:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 384. [2024-11-09 06:27:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 268 states have (on average 1.1007462686567164) internal successors, (295), 263 states have internal predecessors, (295), 83 states have call successors, (83), 60 states have call predecessors, (83), 32 states have return successors, (334), 60 states have call predecessors, (334), 83 states have call successors, (334) [2024-11-09 06:27:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 712 transitions. [2024-11-09 06:27:50,073 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 712 transitions. Word has length 2121 [2024-11-09 06:27:50,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:27:50,074 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 712 transitions. [2024-11-09 06:27:50,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.5925925925925926) internal successors, (97), 28 states have internal predecessors, (97), 21 states have call successors, (28), 1 states have call predecessors, (28), 15 states have return successors, (38), 17 states have call predecessors, (38), 21 states have call successors, (38) [2024-11-09 06:27:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 712 transitions. [2024-11-09 06:27:50,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2762 [2024-11-09 06:27:50,188 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:27:50,188 INFO L215 NwaCegarLoop]: trace histogram [208, 208, 197, 197, 167, 161, 104, 104, 104, 104, 104, 104, 104, 98, 98, 98, 98, 98, 98, 98, 69, 57, 41, 36, 1, 1, 1, 1, 1, 1] [2024-11-09 06:27:50,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 06:27:50,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:27:50,389 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:27:50,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:27:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1119140248, now seen corresponding path program 12 times [2024-11-09 06:27:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:27:50,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592937478] [2024-11-09 06:27:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:27:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:27:51,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:27:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 230513 backedges. 2280 proven. 7652 refuted. 0 times theorem prover too weak. 220581 trivial. 0 not checked. [2024-11-09 06:27:57,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:27:57,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592937478] [2024-11-09 06:27:57,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592937478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:27:57,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530476913] [2024-11-09 06:27:57,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:27:57,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:27:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:27:57,353 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:27:57,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 06:27:58,460 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:27:58,461 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:27:58,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 4913 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 06:27:58,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:27:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 230513 backedges. 35247 proven. 409 refuted. 0 times theorem prover too weak. 194857 trivial. 0 not checked. [2024-11-09 06:27:58,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 230513 backedges. 1823 proven. 12911 refuted. 0 times theorem prover too weak. 215779 trivial. 0 not checked. [2024-11-09 06:28:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530476913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019091793] [2024-11-09 06:28:13,764 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:28:13,764 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:13,765 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:28:13,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:13,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 23] total 32 [2024-11-09 06:28:13,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730432302] [2024-11-09 06:28:13,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:13,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-09 06:28:13,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-09 06:28:13,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-11-09 06:28:13,773 INFO L87 Difference]: Start difference. First operand 384 states and 712 transitions. Second operand has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (48), 16 states have call predecessors, (48), 27 states have call successors, (48) [2024-11-09 06:28:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:15,602 INFO L93 Difference]: Finished difference Result 970 states and 2142 transitions. [2024-11-09 06:28:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-09 06:28:15,603 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (48), 16 states have call predecessors, (48), 27 states have call successors, (48) Word has length 2761 [2024-11-09 06:28:15,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:15,619 INFO L225 Difference]: With dead ends: 970 [2024-11-09 06:28:15,619 INFO L226 Difference]: Without dead ends: 585 [2024-11-09 06:28:15,628 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5578 GetRequests, 5500 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=717, Invalid=3975, Unknown=0, NotChecked=0, Total=4692 [2024-11-09 06:28:15,629 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 175 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:15,629 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 543 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 06:28:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2024-11-09 06:28:15,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 488. [2024-11-09 06:28:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 344 states have (on average 1.1075581395348837) internal successors, (381), 335 states have internal predecessors, (381), 109 states have call successors, (109), 83 states have call predecessors, (109), 34 states have return successors, (483), 69 states have call predecessors, (483), 109 states have call successors, (483) [2024-11-09 06:28:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 973 transitions. [2024-11-09 06:28:15,729 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 973 transitions. Word has length 2761 [2024-11-09 06:28:15,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:15,731 INFO L471 AbstractCegarLoop]: Abstraction has 488 states and 973 transitions. [2024-11-09 06:28:15,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.870967741935484) internal successors, (120), 32 states have internal predecessors, (120), 27 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (48), 16 states have call predecessors, (48), 27 states have call successors, (48) [2024-11-09 06:28:15,731 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 973 transitions. [2024-11-09 06:28:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2911 [2024-11-09 06:28:15,807 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:15,808 INFO L215 NwaCegarLoop]: trace histogram [219, 219, 208, 208, 173, 172, 109, 109, 109, 109, 109, 109, 109, 104, 104, 104, 104, 104, 104, 104, 69, 63, 46, 36, 1, 1, 1, 1, 1, 1] [2024-11-09 06:28:15,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 06:28:16,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:16,009 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:28:16,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1769607949, now seen corresponding path program 13 times [2024-11-09 06:28:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:16,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847005083] [2024-11-09 06:28:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:16,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 256148 backedges. 3873 proven. 12843 refuted. 0 times theorem prover too weak. 239432 trivial. 0 not checked. [2024-11-09 06:28:27,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:28:27,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847005083] [2024-11-09 06:28:27,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847005083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:28:27,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544776259] [2024-11-09 06:28:27,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:28:27,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:27,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:28:27,358 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:28:27,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 06:28:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:28:28,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 6482 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 06:28:28,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:28:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 256148 backedges. 1287 proven. 11599 refuted. 0 times theorem prover too weak. 243262 trivial. 0 not checked. [2024-11-09 06:28:29,379 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:28:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 256148 backedges. 1287 proven. 11669 refuted. 0 times theorem prover too weak. 243192 trivial. 0 not checked. [2024-11-09 06:28:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544776259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:28:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [152041202] [2024-11-09 06:28:48,505 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:28:48,506 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:28:48,506 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:28:48,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:28:48,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 25] total 44 [2024-11-09 06:28:48,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554724398] [2024-11-09 06:28:48,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:28:48,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-09 06:28:48,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:28:48,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-09 06:28:48,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1693, Unknown=0, NotChecked=0, Total=1892 [2024-11-09 06:28:48,514 INFO L87 Difference]: Start difference. First operand 488 states and 973 transitions. Second operand has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 44 states have internal predecessors, (138), 38 states have call successors, (44), 1 states have call predecessors, (44), 23 states have return successors, (62), 25 states have call predecessors, (62), 38 states have call successors, (62) [2024-11-09 06:28:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:28:52,203 INFO L93 Difference]: Finished difference Result 1052 states and 2409 transitions. [2024-11-09 06:28:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-11-09 06:28:52,204 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 44 states have internal predecessors, (138), 38 states have call successors, (44), 1 states have call predecessors, (44), 23 states have return successors, (62), 25 states have call predecessors, (62), 38 states have call successors, (62) Word has length 2910 [2024-11-09 06:28:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:28:52,219 INFO L225 Difference]: With dead ends: 1052 [2024-11-09 06:28:52,220 INFO L226 Difference]: Without dead ends: 530 [2024-11-09 06:28:52,233 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5908 GetRequests, 5796 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3131 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1320, Invalid=9186, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 06:28:52,234 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 176 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 2759 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:28:52,235 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 1308 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2759 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:28:52,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2024-11-09 06:28:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 339. [2024-11-09 06:28:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 235 states have (on average 1.0765957446808512) internal successors, (253), 232 states have internal predecessors, (253), 72 states have call successors, (72), 49 states have call predecessors, (72), 31 states have return successors, (220), 57 states have call predecessors, (220), 72 states have call successors, (220) [2024-11-09 06:28:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 545 transitions. [2024-11-09 06:28:52,316 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 545 transitions. Word has length 2910 [2024-11-09 06:28:52,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:28:52,317 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 545 transitions. [2024-11-09 06:28:52,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 44 states have internal predecessors, (138), 38 states have call successors, (44), 1 states have call predecessors, (44), 23 states have return successors, (62), 25 states have call predecessors, (62), 38 states have call successors, (62) [2024-11-09 06:28:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 545 transitions. [2024-11-09 06:28:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4055 [2024-11-09 06:28:52,458 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:28:52,459 INFO L215 NwaCegarLoop]: trace histogram [299, 299, 296, 296, 241, 240, 149, 149, 149, 149, 149, 149, 149, 148, 148, 148, 148, 148, 148, 148, 93, 91, 58, 56, 1, 1, 1, 1, 1, 1] [2024-11-09 06:28:52,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 06:28:52,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:28:52,661 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:28:52,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:28:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1032297929, now seen corresponding path program 14 times [2024-11-09 06:28:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:28:52,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449792074] [2024-11-09 06:28:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:28:52,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:28:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:29:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 498060 backedges. 13202 proven. 17522 refuted. 0 times theorem prover too weak. 467336 trivial. 0 not checked. [2024-11-09 06:29:18,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:29:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449792074] [2024-11-09 06:29:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449792074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:29:18,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271319799] [2024-11-09 06:29:18,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:29:18,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:18,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:29:18,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:29:18,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 06:29:19,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-09 06:29:19,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:29:19,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 1722 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 06:29:19,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:29:20,037 INFO L134 CoverageAnalysis]: Checked inductivity of 498060 backedges. 2226 proven. 17505 refuted. 0 times theorem prover too weak. 478329 trivial. 0 not checked. [2024-11-09 06:29:20,037 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:29:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 498060 backedges. 2226 proven. 17590 refuted. 0 times theorem prover too weak. 478244 trivial. 0 not checked. [2024-11-09 06:29:44,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271319799] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:29:44,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [12347272] [2024-11-09 06:29:44,521 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:29:44,521 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:29:44,521 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:29:44,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:29:44,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 17, 27] total 47 [2024-11-09 06:29:44,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306509469] [2024-11-09 06:29:44,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:29:44,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 06:29:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:29:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 06:29:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:29:44,531 INFO L87 Difference]: Start difference. First operand 339 states and 545 transitions. Second operand has 47 states, 45 states have (on average 3.2) internal successors, (144), 47 states have internal predecessors, (144), 40 states have call successors, (46), 1 states have call predecessors, (46), 25 states have return successors, (64), 26 states have call predecessors, (64), 40 states have call successors, (64) [2024-11-09 06:29:47,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:29:47,469 INFO L93 Difference]: Finished difference Result 800 states and 1642 transitions. [2024-11-09 06:29:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-11-09 06:29:47,471 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 3.2) internal successors, (144), 47 states have internal predecessors, (144), 40 states have call successors, (46), 1 states have call predecessors, (46), 25 states have return successors, (64), 26 states have call predecessors, (64), 40 states have call successors, (64) Word has length 4054 [2024-11-09 06:29:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:29:47,482 INFO L225 Difference]: With dead ends: 800 [2024-11-09 06:29:47,483 INFO L226 Difference]: Without dead ends: 430 [2024-11-09 06:29:47,491 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8210 GetRequests, 8090 SyntacticMatches, 12 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1470, Invalid=10520, Unknown=0, NotChecked=0, Total=11990 [2024-11-09 06:29:47,492 INFO L432 NwaCegarLoop]: 71 mSDtfsCounter, 279 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 2095 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 2095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:29:47,493 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 1033 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 2095 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 06:29:47,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-09 06:29:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 337. [2024-11-09 06:29:47,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 237 states have (on average 1.0590717299578059) internal successors, (251), 233 states have internal predecessors, (251), 72 states have call successors, (72), 54 states have call predecessors, (72), 27 states have return successors, (151), 49 states have call predecessors, (151), 72 states have call successors, (151) [2024-11-09 06:29:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 474 transitions. [2024-11-09 06:29:47,563 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 474 transitions. Word has length 4054 [2024-11-09 06:29:47,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:29:47,565 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 474 transitions. [2024-11-09 06:29:47,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 3.2) internal successors, (144), 47 states have internal predecessors, (144), 40 states have call successors, (46), 1 states have call predecessors, (46), 25 states have return successors, (64), 26 states have call predecessors, (64), 40 states have call successors, (64) [2024-11-09 06:29:47,566 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 474 transitions. [2024-11-09 06:29:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8767 [2024-11-09 06:29:48,035 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:29:48,036 INFO L215 NwaCegarLoop]: trace histogram [645, 645, 642, 642, 521, 520, 322, 322, 322, 322, 322, 322, 322, 321, 321, 321, 321, 321, 321, 321, 200, 198, 124, 122, 1, 1, 1, 1, 1, 1] [2024-11-09 06:29:48,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 06:29:48,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:29:48,237 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:29:48,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:29:48,240 INFO L85 PathProgramCache]: Analyzing trace with hash -532658115, now seen corresponding path program 15 times [2024-11-09 06:29:48,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:29:48,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133115682] [2024-11-09 06:29:48,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:29:48,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:29:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:31:45,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2336368 backedges. 16749 proven. 60161 refuted. 0 times theorem prover too weak. 2259458 trivial. 0 not checked. [2024-11-09 06:31:45,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:31:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133115682] [2024-11-09 06:31:45,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133115682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:31:45,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646774375] [2024-11-09 06:31:45,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 06:31:45,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:31:45,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:31:45,484 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:31:45,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 06:31:48,746 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 06:31:48,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:31:48,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 15600 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-09 06:31:48,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:31:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2336368 backedges. 1185660 proven. 23680 refuted. 0 times theorem prover too weak. 1127028 trivial. 0 not checked. [2024-11-09 06:31:49,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:32:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2336368 backedges. 18019 proven. 65036 refuted. 0 times theorem prover too weak. 2253313 trivial. 0 not checked. [2024-11-09 06:32:51,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646774375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:32:51,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818085905] [2024-11-09 06:32:51,141 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:32:51,141 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:32:51,142 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:32:51,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:32:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 47] total 55 [2024-11-09 06:32:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212882923] [2024-11-09 06:32:51,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:32:51,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-09 06:32:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:32:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-09 06:32:51,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=2680, Unknown=0, NotChecked=0, Total=2970 [2024-11-09 06:32:51,162 INFO L87 Difference]: Start difference. First operand 337 states and 474 transitions. Second operand has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 48 states have call successors, (58), 2 states have call predecessors, (58), 25 states have return successors, (77), 25 states have call predecessors, (77), 48 states have call successors, (77) [2024-11-09 06:32:55,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:32:55,140 INFO L93 Difference]: Finished difference Result 766 states and 1214 transitions. [2024-11-09 06:32:55,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-09 06:32:55,142 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 48 states have call successors, (58), 2 states have call predecessors, (58), 25 states have return successors, (77), 25 states have call predecessors, (77), 48 states have call successors, (77) Word has length 8766 [2024-11-09 06:32:55,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:32:55,159 INFO L225 Difference]: With dead ends: 766 [2024-11-09 06:32:55,159 INFO L226 Difference]: Without dead ends: 447 [2024-11-09 06:32:55,164 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17633 GetRequests, 17499 SyntacticMatches, 23 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1639, Invalid=11017, Unknown=0, NotChecked=0, Total=12656 [2024-11-09 06:32:55,165 INFO L432 NwaCegarLoop]: 73 mSDtfsCounter, 248 mSDsluCounter, 1211 mSDsCounter, 0 mSdLazyCounter, 2918 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 2918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:32:55,166 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1284 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 2918 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-09 06:32:55,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2024-11-09 06:32:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 356. [2024-11-09 06:32:55,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 250 states have (on average 1.044) internal successors, (261), 246 states have internal predecessors, (261), 77 states have call successors, (77), 57 states have call predecessors, (77), 28 states have return successors, (191), 52 states have call predecessors, (191), 77 states have call successors, (191) [2024-11-09 06:32:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 529 transitions. [2024-11-09 06:32:55,244 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 529 transitions. Word has length 8766 [2024-11-09 06:32:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:32:55,249 INFO L471 AbstractCegarLoop]: Abstraction has 356 states and 529 transitions. [2024-11-09 06:32:55,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.381818181818182) internal successors, (186), 55 states have internal predecessors, (186), 48 states have call successors, (58), 2 states have call predecessors, (58), 25 states have return successors, (77), 25 states have call predecessors, (77), 48 states have call successors, (77) [2024-11-09 06:32:55,250 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 529 transitions. [2024-11-09 06:32:55,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6057 [2024-11-09 06:32:55,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:32:55,456 INFO L215 NwaCegarLoop]: trace histogram [445, 445, 444, 444, 360, 359, 222, 222, 222, 222, 222, 222, 222, 222, 222, 222, 222, 222, 222, 222, 138, 137, 86, 84, 1, 1, 1, 1, 1, 1] [2024-11-09 06:32:55,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 06:32:55,656 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 06:32:55,657 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:32:55,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:32:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -601386592, now seen corresponding path program 16 times [2024-11-09 06:32:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:32:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70969029] [2024-11-09 06:32:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:32:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:32:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1113673 backedges. 6916 proven. 20254 refuted. 0 times theorem prover too weak. 1086503 trivial. 0 not checked. [2024-11-09 06:33:36,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:33:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70969029] [2024-11-09 06:33:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70969029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:33:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094610785] [2024-11-09 06:33:36,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 06:33:36,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:33:36,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:33:36,676 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:33:36,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 06:33:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:33:39,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 13467 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 06:33:39,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:33:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1113673 backedges. 3369 proven. 28831 refuted. 0 times theorem prover too weak. 1081473 trivial. 0 not checked. [2024-11-09 06:33:39,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:34:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1113673 backedges. 3369 proven. 28933 refuted. 0 times theorem prover too weak. 1081371 trivial. 0 not checked. [2024-11-09 06:34:15,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094610785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:34:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603733701] [2024-11-09 06:34:15,499 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:34:15,499 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:34:15,500 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:34:15,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:34:15,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 29] total 35 [2024-11-09 06:34:15,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2272829] [2024-11-09 06:34:15,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:34:15,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 06:34:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:34:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 06:34:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-11-09 06:34:15,513 INFO L87 Difference]: Start difference. First operand 356 states and 529 transitions. Second operand has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2024-11-09 06:34:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:34:16,163 INFO L93 Difference]: Finished difference Result 399 states and 659 transitions. [2024-11-09 06:34:16,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 06:34:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) Word has length 6056 [2024-11-09 06:34:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:34:16,175 INFO L225 Difference]: With dead ends: 399 [2024-11-09 06:34:16,175 INFO L226 Difference]: Without dead ends: 375 [2024-11-09 06:34:16,176 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12150 GetRequests, 12089 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=447, Invalid=2003, Unknown=0, NotChecked=0, Total=2450 [2024-11-09 06:34:16,178 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:34:16,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 241 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:34:16,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-09 06:34:16,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 362. [2024-11-09 06:34:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 254 states have (on average 1.0433070866141732) internal successors, (265), 250 states have internal predecessors, (265), 77 states have call successors, (77), 57 states have call predecessors, (77), 30 states have return successors, (202), 54 states have call predecessors, (202), 77 states have call successors, (202) [2024-11-09 06:34:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 544 transitions. [2024-11-09 06:34:16,255 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 544 transitions. Word has length 6056 [2024-11-09 06:34:16,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:34:16,256 INFO L471 AbstractCegarLoop]: Abstraction has 362 states and 544 transitions. [2024-11-09 06:34:16,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 35 states have internal predecessors, (113), 31 states have call successors, (35), 1 states have call predecessors, (35), 17 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2024-11-09 06:34:16,257 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 544 transitions. [2024-11-09 06:34:16,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9979 [2024-11-09 06:34:16,886 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:34:16,887 INFO L215 NwaCegarLoop]: trace histogram [733, 733, 732, 732, 593, 592, 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, 366, 227, 226, 141, 139, 1, 1, 1, 1, 1, 1] [2024-11-09 06:34:16,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 06:34:17,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 06:34:17,088 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:34:17,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:34:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1021055900, now seen corresponding path program 17 times [2024-11-09 06:34:17,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:34:17,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889001226] [2024-11-09 06:34:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:34:17,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:34:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:36:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3028120 backedges. 5017 proven. 52535 refuted. 0 times theorem prover too weak. 2970568 trivial. 0 not checked. [2024-11-09 06:36:20,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:36:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889001226] [2024-11-09 06:36:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889001226] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:36:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21705196] [2024-11-09 06:36:20,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 06:36:20,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:36:20,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:36:20,642 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:36:20,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 06:36:22,729 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2024-11-09 06:36:22,729 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 06:36:22,741 INFO L255 TraceCheckSpWp]: Trace formula consists of 2040 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 06:36:22,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:36:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3028120 backedges. 5017 proven. 52535 refuted. 0 times theorem prover too weak. 2970568 trivial. 0 not checked. [2024-11-09 06:36:23,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:37:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3028120 backedges. 5017 proven. 52655 refuted. 0 times theorem prover too weak. 2970448 trivial. 0 not checked. [2024-11-09 06:37:18,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21705196] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:37:18,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1720346146] [2024-11-09 06:37:18,993 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2024-11-09 06:37:18,993 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:37:18,994 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:96) 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:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) 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:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:426) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:143) 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:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) 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) [2024-11-09 06:37:18,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:37:19,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 31] total 34 [2024-11-09 06:37:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664586480] [2024-11-09 06:37:19,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:37:19,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 06:37:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:37:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 06:37:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 06:37:19,007 INFO L87 Difference]: Start difference. First operand 362 states and 544 transitions. Second operand has 34 states, 32 states have (on average 3.4375) internal successors, (110), 34 states have internal predecessors, (110), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) [2024-11-09 06:37:19,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:37:19,580 INFO L93 Difference]: Finished difference Result 389 states and 619 transitions. [2024-11-09 06:37:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 06:37:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.4375) internal successors, (110), 34 states have internal predecessors, (110), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) Word has length 9978 [2024-11-09 06:37:19,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:37:19,597 INFO L225 Difference]: With dead ends: 389 [2024-11-09 06:37:19,598 INFO L226 Difference]: Without dead ends: 375 [2024-11-09 06:37:19,599 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19998 GetRequests, 19939 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2024-11-09 06:37:19,600 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:37:19,600 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 291 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:37:19,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2024-11-09 06:37:19,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 365. [2024-11-09 06:37:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 256 states have (on average 1.04296875) internal successors, (267), 252 states have internal predecessors, (267), 77 states have call successors, (77), 57 states have call predecessors, (77), 31 states have return successors, (208), 55 states have call predecessors, (208), 77 states have call successors, (208) [2024-11-09 06:37:19,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 552 transitions. [2024-11-09 06:37:19,664 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 552 transitions. Word has length 9978 [2024-11-09 06:37:19,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:37:19,665 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 552 transitions. [2024-11-09 06:37:19,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.4375) internal successors, (110), 34 states have internal predecessors, (110), 31 states have call successors, (34), 1 states have call predecessors, (34), 15 states have return successors, (45), 15 states have call predecessors, (45), 31 states have call successors, (45) [2024-11-09 06:37:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 552 transitions. [2024-11-09 06:37:21,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15113 [2024-11-09 06:37:21,080 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:37:21,082 INFO L215 NwaCegarLoop]: trace histogram [1111, 1111, 1108, 1108, 898, 897, 555, 555, 555, 555, 555, 555, 555, 554, 554, 554, 554, 554, 554, 554, 343, 343, 214, 210, 1, 1, 1, 1, 1, 1] [2024-11-09 06:37:21,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 06:37:21,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0721348-bd2b-4187-9b7c-83a5ffb05b76/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:37:21,283 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:37:21,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:37:21,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1678396169, now seen corresponding path program 18 times [2024-11-09 06:37:21,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:37:21,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279803093] [2024-11-09 06:37:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:37:21,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:37:47,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat