./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.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_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/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_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/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_e5622ce7-2545-4361-92f5-bda0ea496f41/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 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:09:13,746 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:09:13,839 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 01:09:13,849 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:09:13,849 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 01:09:13,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:09:13,893 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 01:09:13,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 01:09:13,894 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:09:13,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 01:09:13,895 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 01:09:13,896 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 01:09:13,896 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 01:09:13,897 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 01:09:13,897 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 01:09:13,898 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 01:09:13,898 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 01:09:13,899 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 01:09:13,900 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 01:09:13,900 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 01:09:13,901 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 01:09:13,903 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 01:09:13,917 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:09:13,917 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:09:13,918 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:09:13,918 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:09:13,918 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:09:13,919 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:09:13,919 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:09:13,924 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:09:13,924 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:09:13,925 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:09:13,925 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:09:13,925 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:09:13,926 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:09:13,926 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:09:13,926 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 01:09:13,927 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 01:09:13,927 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:13,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:09:13,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:09:13,936 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:09:13,937 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 01:09:13,937 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:09:13,938 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 01:09:13,938 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 01:09:13,938 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 01:09:13,939 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_e5622ce7-2545-4361-92f5-bda0ea496f41/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43b1e2ddb5478e4d8ee38477d15f5851a49b7cf223d0a089a3fdb9014fd7706f [2024-11-09 01:09:14,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:09:14,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:09:14,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:09:14,343 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:09:14,344 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:09:14,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/eca-rers2012/Problem03_label42.c Unable to find full path for "g++" [2024-11-09 01:09:16,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:09:17,463 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:09:17,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/sv-benchmarks/c/eca-rers2012/Problem03_label42.c [2024-11-09 01:09:17,489 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/data/77f11a20c/c1fb5040e81747f482b39660a9eb241c/FLAG90a8310ad [2024-11-09 01:09:17,519 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/data/77f11a20c/c1fb5040e81747f482b39660a9eb241c [2024-11-09 01:09:17,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:09:17,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:09:17,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:17,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:09:17,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:09:17,540 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:17" (1/1) ... [2024-11-09 01:09:17,541 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421507c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:17, skipping insertion in model container [2024-11-09 01:09:17,542 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:09:17" (1/1) ... [2024-11-09 01:09:17,656 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:09:18,575 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_e5622ce7-2545-4361-92f5-bda0ea496f41/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2024-11-09 01:09:18,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:18,641 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:09:19,103 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_e5622ce7-2545-4361-92f5-bda0ea496f41/sv-benchmarks/c/eca-rers2012/Problem03_label42.c[60691,60704] [2024-11-09 01:09:19,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:09:19,147 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:09:19,148 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19 WrapperNode [2024-11-09 01:09:19,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:09:19,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:19,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:09:19,151 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:09:19,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,234 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,346 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-09 01:09:19,347 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:09:19,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:09:19,348 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:09:19,348 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:09:19,361 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,361 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,371 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,371 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,426 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,438 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,455 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,467 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:09:19,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:09:19,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:09:19,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:09:19,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (1/1) ... [2024-11-09 01:09:19,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 01:09:19,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:19,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 01:09:19,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 01:09:19,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:09:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:09:19,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:09:19,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:09:19,711 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:09:19,715 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:09:22,260 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-09 01:09:22,260 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:09:22,851 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:09:22,853 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 01:09:22,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:22 BoogieIcfgContainer [2024-11-09 01:09:22,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:09:22,858 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 01:09:22,859 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 01:09:22,863 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 01:09:22,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 01:09:17" (1/3) ... [2024-11-09 01:09:22,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aadab8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:22, skipping insertion in model container [2024-11-09 01:09:22,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:09:19" (2/3) ... [2024-11-09 01:09:22,868 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aadab8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 01:09:22, skipping insertion in model container [2024-11-09 01:09:22,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:09:22" (3/3) ... [2024-11-09 01:09:22,872 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label42.c [2024-11-09 01:09:22,899 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 01:09:22,900 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 01:09:23,006 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 01:09:23,016 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;@26264fb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 01:09:23,019 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 01:09:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:23,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 01:09:23,048 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:23,049 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:23,050 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:23,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1934941869, now seen corresponding path program 1 times [2024-11-09 01:09:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:23,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418747605] [2024-11-09 01:09:23,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:23,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:23,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:24,407 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 01:09:24,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:24,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418747605] [2024-11-09 01:09:24,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418747605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:24,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:24,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:24,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728177741] [2024-11-09 01:09:24,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:24,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:24,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:24,471 INFO L87 Difference]: Start difference. First operand has 148 states, 146 states have (on average 1.9726027397260273) internal successors, (288), 147 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:25,905 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-09 01:09:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:25,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2024-11-09 01:09:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:25,930 INFO L225 Difference]: With dead ends: 440 [2024-11-09 01:09:25,930 INFO L226 Difference]: Without dead ends: 289 [2024-11-09 01:09:25,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:25,943 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 38 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:25,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 01:09:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-09 01:09:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-09 01:09:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.8055555555555556) internal successors, (520), 288 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 520 transitions. [2024-11-09 01:09:26,047 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 520 transitions. Word has length 143 [2024-11-09 01:09:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:26,051 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 520 transitions. [2024-11-09 01:09:26,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 520 transitions. [2024-11-09 01:09:26,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-09 01:09:26,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:26,058 INFO L215 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:26,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 01:09:26,059 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:26,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:26,059 INFO L85 PathProgramCache]: Analyzing trace with hash -37343126, now seen corresponding path program 1 times [2024-11-09 01:09:26,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:26,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156512975] [2024-11-09 01:09:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:26,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:26,568 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156512975] [2024-11-09 01:09:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156512975] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:26,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:26,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:26,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233974887] [2024-11-09 01:09:26,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:26,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:26,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:26,573 INFO L87 Difference]: Start difference. First operand 289 states and 520 transitions. Second operand has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:27,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:27,757 INFO L93 Difference]: Finished difference Result 865 states and 1558 transitions. [2024-11-09 01:09:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2024-11-09 01:09:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:27,762 INFO L225 Difference]: With dead ends: 865 [2024-11-09 01:09:27,762 INFO L226 Difference]: Without dead ends: 577 [2024-11-09 01:09:27,764 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:27,765 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 166 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:27,766 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 69 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:09:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-11-09 01:09:27,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 575. [2024-11-09 01:09:27,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.6742160278745644) internal successors, (961), 574 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 961 transitions. [2024-11-09 01:09:27,803 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 961 transitions. Word has length 148 [2024-11-09 01:09:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:27,803 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 961 transitions. [2024-11-09 01:09:27,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.333333333333336) internal successors, (148), 2 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 961 transitions. [2024-11-09 01:09:27,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 01:09:27,809 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:27,809 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:27,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 01:09:27,810 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:27,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash 588549234, now seen corresponding path program 1 times [2024-11-09 01:09:27,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:27,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50641714] [2024-11-09 01:09:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:28,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:28,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50641714] [2024-11-09 01:09:28,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50641714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:28,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:28,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:28,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266970153] [2024-11-09 01:09:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:28,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:28,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:28,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:28,186 INFO L87 Difference]: Start difference. First operand 575 states and 961 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:29,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:29,306 INFO L93 Difference]: Finished difference Result 1721 states and 2880 transitions. [2024-11-09 01:09:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:29,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2024-11-09 01:09:29,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:29,311 INFO L225 Difference]: With dead ends: 1721 [2024-11-09 01:09:29,312 INFO L226 Difference]: Without dead ends: 1147 [2024-11-09 01:09:29,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:29,316 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:29,316 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:09:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-09 01:09:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-09 01:09:29,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.6265270506108203) internal successors, (1864), 1146 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:29,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1864 transitions. [2024-11-09 01:09:29,371 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1864 transitions. Word has length 151 [2024-11-09 01:09:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:29,372 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1864 transitions. [2024-11-09 01:09:29,372 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 2 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:29,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1864 transitions. [2024-11-09 01:09:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-09 01:09:29,377 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:29,378 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:29,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 01:09:29,378 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:29,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash -656868391, now seen corresponding path program 1 times [2024-11-09 01:09:29,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:29,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000564382] [2024-11-09 01:09:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:29,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:09:29,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000564382] [2024-11-09 01:09:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000564382] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:29,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:29,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211029843] [2024-11-09 01:09:29,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:29,787 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:29,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:29,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:29,789 INFO L87 Difference]: Start difference. First operand 1147 states and 1864 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:30,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:30,966 INFO L93 Difference]: Finished difference Result 3437 states and 5589 transitions. [2024-11-09 01:09:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2024-11-09 01:09:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:30,976 INFO L225 Difference]: With dead ends: 3437 [2024-11-09 01:09:30,976 INFO L226 Difference]: Without dead ends: 2291 [2024-11-09 01:09:30,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:30,981 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 151 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:30,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 260 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:09:30,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-09 01:09:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2024-11-09 01:09:31,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.4017467248908297) internal successors, (3210), 2290 states have internal predecessors, (3210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3210 transitions. [2024-11-09 01:09:31,053 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3210 transitions. Word has length 163 [2024-11-09 01:09:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:31,053 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3210 transitions. [2024-11-09 01:09:31,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3210 transitions. [2024-11-09 01:09:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-09 01:09:31,060 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:31,061 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:31,061 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 01:09:31,061 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:31,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:31,062 INFO L85 PathProgramCache]: Analyzing trace with hash -88239835, now seen corresponding path program 1 times [2024-11-09 01:09:31,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:31,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407708221] [2024-11-09 01:09:31,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:31,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 01:09:31,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:31,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407708221] [2024-11-09 01:09:31,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407708221] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:31,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:31,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414884166] [2024-11-09 01:09:31,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:31,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:31,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:31,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:31,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:31,358 INFO L87 Difference]: Start difference. First operand 2291 states and 3210 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:31,922 INFO L93 Difference]: Finished difference Result 4581 states and 6419 transitions. [2024-11-09 01:09:31,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:31,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2024-11-09 01:09:31,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:31,932 INFO L225 Difference]: With dead ends: 4581 [2024-11-09 01:09:31,932 INFO L226 Difference]: Without dead ends: 2291 [2024-11-09 01:09:31,935 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:31,936 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:31,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 01:09:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2024-11-09 01:09:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2291. [2024-11-09 01:09:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.3615720524017467) internal successors, (3118), 2290 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3118 transitions. [2024-11-09 01:09:31,998 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3118 transitions. Word has length 176 [2024-11-09 01:09:31,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:31,999 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3118 transitions. [2024-11-09 01:09:31,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3118 transitions. [2024-11-09 01:09:32,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-09 01:09:32,005 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:32,005 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:32,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 01:09:32,006 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:32,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:32,007 INFO L85 PathProgramCache]: Analyzing trace with hash -267834775, now seen corresponding path program 1 times [2024-11-09 01:09:32,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:32,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527058280] [2024-11-09 01:09:32,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:32,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:32,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:32,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:32,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527058280] [2024-11-09 01:09:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527058280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:32,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:32,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:32,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122877449] [2024-11-09 01:09:32,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:32,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:32,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:32,693 INFO L87 Difference]: Start difference. First operand 2291 states and 3118 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:33,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:33,824 INFO L93 Difference]: Finished difference Result 5725 states and 7762 transitions. [2024-11-09 01:09:33,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2024-11-09 01:09:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:33,845 INFO L225 Difference]: With dead ends: 5725 [2024-11-09 01:09:33,845 INFO L226 Difference]: Without dead ends: 3435 [2024-11-09 01:09:33,850 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:33,854 INFO L432 NwaCegarLoop]: 75 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:33,857 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 79 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:09:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3435 states. [2024-11-09 01:09:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3435 to 3435. [2024-11-09 01:09:33,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 1.3386721025043682) internal successors, (4597), 3434 states have internal predecessors, (4597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:33,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 4597 transitions. [2024-11-09 01:09:33,981 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 4597 transitions. Word has length 184 [2024-11-09 01:09:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:33,982 INFO L471 AbstractCegarLoop]: Abstraction has 3435 states and 4597 transitions. [2024-11-09 01:09:33,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 4597 transitions. [2024-11-09 01:09:33,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-09 01:09:33,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:33,991 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:09:33,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 01:09:33,992 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:33,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:33,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1466487959, now seen corresponding path program 1 times [2024-11-09 01:09:33,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:33,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178728644] [2024-11-09 01:09:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:33,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:34,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178728644] [2024-11-09 01:09:34,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178728644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638061056] [2024-11-09 01:09:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:34,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:34,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 01:09:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:35,126 INFO L255 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:09:35,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:09:35,482 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:09:35,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638061056] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:35,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:09:35,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 01:09:35,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866207421] [2024-11-09 01:09:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:35,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:35,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:35,488 INFO L87 Difference]: Start difference. First operand 3435 states and 4597 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:36,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:36,651 INFO L93 Difference]: Finished difference Result 7584 states and 10254 transitions. [2024-11-09 01:09:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:36,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2024-11-09 01:09:36,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:36,671 INFO L225 Difference]: With dead ends: 7584 [2024-11-09 01:09:36,671 INFO L226 Difference]: Without dead ends: 4293 [2024-11-09 01:09:36,676 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 190 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 01:09:36,678 INFO L432 NwaCegarLoop]: 225 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:36,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 229 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 01:09:36,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4293 states. [2024-11-09 01:09:36,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4293 to 4293. [2024-11-09 01:09:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4293 states, 4292 states have (on average 1.3070829450139796) internal successors, (5610), 4292 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4293 states to 4293 states and 5610 transitions. [2024-11-09 01:09:36,818 INFO L78 Accepts]: Start accepts. Automaton has 4293 states and 5610 transitions. Word has length 191 [2024-11-09 01:09:36,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:36,819 INFO L471 AbstractCegarLoop]: Abstraction has 4293 states and 5610 transitions. [2024-11-09 01:09:36,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:36,820 INFO L276 IsEmpty]: Start isEmpty. Operand 4293 states and 5610 transitions. [2024-11-09 01:09:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-09 01:09:36,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:36,834 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:36,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 01:09:37,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 01:09:37,036 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:37,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1539014233, now seen corresponding path program 1 times [2024-11-09 01:09:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:37,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699289120] [2024-11-09 01:09:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:37,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:37,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:09:37,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:37,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699289120] [2024-11-09 01:09:37,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699289120] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:37,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:37,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:37,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441739775] [2024-11-09 01:09:37,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:37,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:37,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:37,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:37,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:37,315 INFO L87 Difference]: Start difference. First operand 4293 states and 5610 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:38,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:38,351 INFO L93 Difference]: Finished difference Result 10587 states and 14242 transitions. [2024-11-09 01:09:38,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2024-11-09 01:09:38,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:38,377 INFO L225 Difference]: With dead ends: 10587 [2024-11-09 01:09:38,377 INFO L226 Difference]: Without dead ends: 6295 [2024-11-09 01:09:38,383 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:38,383 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 113 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:38,384 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 85 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:09:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6295 states. [2024-11-09 01:09:38,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6295 to 6295. [2024-11-09 01:09:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6295 states, 6294 states have (on average 1.2585001588814744) internal successors, (7921), 6294 states have internal predecessors, (7921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6295 states to 6295 states and 7921 transitions. [2024-11-09 01:09:38,536 INFO L78 Accepts]: Start accepts. Automaton has 6295 states and 7921 transitions. Word has length 194 [2024-11-09 01:09:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:38,537 INFO L471 AbstractCegarLoop]: Abstraction has 6295 states and 7921 transitions. [2024-11-09 01:09:38,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 6295 states and 7921 transitions. [2024-11-09 01:09:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2024-11-09 01:09:38,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:38,550 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:38,551 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 01:09:38,551 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:38,552 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 203469706, now seen corresponding path program 1 times [2024-11-09 01:09:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:38,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100512351] [2024-11-09 01:09:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:38,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:41,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100512351] [2024-11-09 01:09:41,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100512351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:41,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213357569] [2024-11-09 01:09:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:41,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:41,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:41,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:41,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 01:09:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:41,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:09:41,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:41,959 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:09:42,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213357569] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:42,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:09:42,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2024-11-09 01:09:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933293871] [2024-11-09 01:09:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:42,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:42,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:42,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:09:42,244 INFO L87 Difference]: Start difference. First operand 6295 states and 7921 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:43,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:43,354 INFO L93 Difference]: Finished difference Result 17022 states and 21508 transitions. [2024-11-09 01:09:43,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:43,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2024-11-09 01:09:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:43,407 INFO L225 Difference]: With dead ends: 17022 [2024-11-09 01:09:43,408 INFO L226 Difference]: Without dead ends: 10871 [2024-11-09 01:09:43,417 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:09:43,419 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 9 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:43,422 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 233 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:09:43,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10871 states. [2024-11-09 01:09:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10871 to 10871. [2024-11-09 01:09:43,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10871 states, 10870 states have (on average 1.2414903403863846) internal successors, (13495), 10870 states have internal predecessors, (13495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:43,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10871 states to 10871 states and 13495 transitions. [2024-11-09 01:09:43,728 INFO L78 Accepts]: Start accepts. Automaton has 10871 states and 13495 transitions. Word has length 221 [2024-11-09 01:09:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:43,729 INFO L471 AbstractCegarLoop]: Abstraction has 10871 states and 13495 transitions. [2024-11-09 01:09:43,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 10871 states and 13495 transitions. [2024-11-09 01:09:43,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2024-11-09 01:09:43,749 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:43,749 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:43,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 01:09:43,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:43,950 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:43,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:43,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1544794410, now seen corresponding path program 1 times [2024-11-09 01:09:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:43,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117767554] [2024-11-09 01:09:43,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:43,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 100 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 01:09:44,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:44,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117767554] [2024-11-09 01:09:44,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117767554] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:44,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247779874] [2024-11-09 01:09:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:44,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:44,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:44,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:44,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 01:09:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:45,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:09:45,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:09:45,234 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:09:45,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247779874] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:45,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:09:45,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 01:09:45,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503256642] [2024-11-09 01:09:45,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:45,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:45,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:45,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:45,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 01:09:45,238 INFO L87 Difference]: Start difference. First operand 10871 states and 13495 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:46,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:46,383 INFO L93 Difference]: Finished difference Result 26174 states and 32564 transitions. [2024-11-09 01:09:46,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:46,384 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 232 [2024-11-09 01:09:46,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:46,418 INFO L225 Difference]: With dead ends: 26174 [2024-11-09 01:09:46,418 INFO L226 Difference]: Without dead ends: 15447 [2024-11-09 01:09:46,431 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 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 01:09:46,432 INFO L432 NwaCegarLoop]: 238 mSDtfsCounter, 129 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:46,433 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 241 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 01:09:46,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15447 states. [2024-11-09 01:09:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15447 to 15304. [2024-11-09 01:09:46,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15304 states, 15303 states have (on average 1.228517284192642) internal successors, (18800), 15303 states have internal predecessors, (18800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15304 states to 15304 states and 18800 transitions. [2024-11-09 01:09:46,851 INFO L78 Accepts]: Start accepts. Automaton has 15304 states and 18800 transitions. Word has length 232 [2024-11-09 01:09:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:46,852 INFO L471 AbstractCegarLoop]: Abstraction has 15304 states and 18800 transitions. [2024-11-09 01:09:46,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:46,853 INFO L276 IsEmpty]: Start isEmpty. Operand 15304 states and 18800 transitions. [2024-11-09 01:09:46,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2024-11-09 01:09:46,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:46,877 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:46,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 01:09:47,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:47,082 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:47,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:47,083 INFO L85 PathProgramCache]: Analyzing trace with hash 103929794, now seen corresponding path program 1 times [2024-11-09 01:09:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:47,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229939409] [2024-11-09 01:09:47,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:47,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:47,591 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 01:09:47,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:47,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229939409] [2024-11-09 01:09:47,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229939409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:47,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:47,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:47,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16040332] [2024-11-09 01:09:47,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:47,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:47,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:47,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:47,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:47,594 INFO L87 Difference]: Start difference. First operand 15304 states and 18800 transitions. Second operand has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:48,548 INFO L93 Difference]: Finished difference Result 33326 states and 41025 transitions. [2024-11-09 01:09:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2024-11-09 01:09:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:48,586 INFO L225 Difference]: With dead ends: 33326 [2024-11-09 01:09:48,587 INFO L226 Difference]: Without dead ends: 18309 [2024-11-09 01:09:48,600 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:48,601 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:48,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 82 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:09:48,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18309 states. [2024-11-09 01:09:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18309 to 16877. [2024-11-09 01:09:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16877 states, 16876 states have (on average 1.2335861578573122) internal successors, (20818), 16876 states have internal predecessors, (20818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16877 states to 16877 states and 20818 transitions. [2024-11-09 01:09:49,056 INFO L78 Accepts]: Start accepts. Automaton has 16877 states and 20818 transitions. Word has length 259 [2024-11-09 01:09:49,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:49,056 INFO L471 AbstractCegarLoop]: Abstraction has 16877 states and 20818 transitions. [2024-11-09 01:09:49,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.33333333333333) internal successors, (220), 2 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:49,057 INFO L276 IsEmpty]: Start isEmpty. Operand 16877 states and 20818 transitions. [2024-11-09 01:09:49,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-11-09 01:09:49,076 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:49,076 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:49,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 01:09:49,076 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:49,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash -362872937, now seen corresponding path program 1 times [2024-11-09 01:09:49,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:49,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356062981] [2024-11-09 01:09:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:49,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 130 proven. 6 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-09 01:09:51,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:51,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356062981] [2024-11-09 01:09:51,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356062981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554084598] [2024-11-09 01:09:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:51,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:51,184 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:51,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 01:09:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:51,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:09:51,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-09 01:09:51,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:09:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 171 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-09 01:09:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554084598] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:51,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 01:09:51,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2024-11-09 01:09:51,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712277496] [2024-11-09 01:09:51,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:51,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:51,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:51,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:51,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:09:51,851 INFO L87 Difference]: Start difference. First operand 16877 states and 20818 transitions. Second operand has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:53,011 INFO L93 Difference]: Finished difference Result 37042 states and 45941 transitions. [2024-11-09 01:09:53,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:53,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 262 [2024-11-09 01:09:53,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:53,060 INFO L225 Difference]: With dead ends: 37042 [2024-11-09 01:09:53,061 INFO L226 Difference]: Without dead ends: 20452 [2024-11-09 01:09:53,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 01:09:53,079 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 139 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:53,080 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 229 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 01:09:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20452 states. [2024-11-09 01:09:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20452 to 19594. [2024-11-09 01:09:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 1.2141581176950953) internal successors, (23789), 19593 states have internal predecessors, (23789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 23789 transitions. [2024-11-09 01:09:53,452 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 23789 transitions. Word has length 262 [2024-11-09 01:09:53,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:53,452 INFO L471 AbstractCegarLoop]: Abstraction has 19594 states and 23789 transitions. [2024-11-09 01:09:53,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 23789 transitions. [2024-11-09 01:09:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-11-09 01:09:53,480 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:53,481 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:53,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 01:09:53,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:53,682 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:53,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2024219558, now seen corresponding path program 1 times [2024-11-09 01:09:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:53,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970189432] [2024-11-09 01:09:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:54,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970189432] [2024-11-09 01:09:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970189432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:54,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 01:09:54,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152828676] [2024-11-09 01:09:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:54,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:54,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:54,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:54,393 INFO L87 Difference]: Start difference. First operand 19594 states and 23789 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:55,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:55,317 INFO L93 Difference]: Finished difference Result 42905 states and 51903 transitions. [2024-11-09 01:09:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:55,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 267 [2024-11-09 01:09:55,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:55,357 INFO L225 Difference]: With dead ends: 42905 [2024-11-09 01:09:55,358 INFO L226 Difference]: Without dead ends: 23598 [2024-11-09 01:09:55,373 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:55,374 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:55,374 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 82 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:09:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23598 states. [2024-11-09 01:09:55,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23598 to 23598. [2024-11-09 01:09:55,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23598 states, 23597 states have (on average 1.1997287790820867) internal successors, (28310), 23597 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23598 states to 23598 states and 28310 transitions. [2024-11-09 01:09:55,790 INFO L78 Accepts]: Start accepts. Automaton has 23598 states and 28310 transitions. Word has length 267 [2024-11-09 01:09:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:55,791 INFO L471 AbstractCegarLoop]: Abstraction has 23598 states and 28310 transitions. [2024-11-09 01:09:55,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 2 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 23598 states and 28310 transitions. [2024-11-09 01:09:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-09 01:09:55,814 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:55,815 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:55,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 01:09:55,815 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:55,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:55,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1198541268, now seen corresponding path program 1 times [2024-11-09 01:09:55,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:55,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410931661] [2024-11-09 01:09:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:55,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:55,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:09:56,475 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:56,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410931661] [2024-11-09 01:09:56,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410931661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:56,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 01:09:56,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 01:09:56,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039543178] [2024-11-09 01:09:56,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:56,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:56,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:56,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:56,479 INFO L87 Difference]: Start difference. First operand 23598 states and 28310 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:09:57,418 INFO L93 Difference]: Finished difference Result 46480 states and 55940 transitions. [2024-11-09 01:09:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:09:57,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 271 [2024-11-09 01:09:57,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:09:57,456 INFO L225 Difference]: With dead ends: 46480 [2024-11-09 01:09:57,456 INFO L226 Difference]: Without dead ends: 23884 [2024-11-09 01:09:57,473 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 01:09:57,474 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 01:09:57,474 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 01:09:57,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23884 states. [2024-11-09 01:09:57,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23884 to 23741. [2024-11-09 01:09:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23741 states, 23740 states have (on average 1.2033698399326032) internal successors, (28568), 23740 states have internal predecessors, (28568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23741 states to 23741 states and 28568 transitions. [2024-11-09 01:09:57,880 INFO L78 Accepts]: Start accepts. Automaton has 23741 states and 28568 transitions. Word has length 271 [2024-11-09 01:09:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:09:57,881 INFO L471 AbstractCegarLoop]: Abstraction has 23741 states and 28568 transitions. [2024-11-09 01:09:57,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:09:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 23741 states and 28568 transitions. [2024-11-09 01:09:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-11-09 01:09:57,904 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:09:57,904 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:09:57,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 01:09:57,905 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:09:57,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:09:57,905 INFO L85 PathProgramCache]: Analyzing trace with hash -188553276, now seen corresponding path program 2 times [2024-11-09 01:09:57,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:09:57,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857343626] [2024-11-09 01:09:57,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:09:57,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:09:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:09:58,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:09:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857343626] [2024-11-09 01:09:58,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857343626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:09:58,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758107823] [2024-11-09 01:09:58,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 01:09:58,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:09:58,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:09:58,755 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:09:58,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 01:09:58,934 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 01:09:58,935 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 01:09:58,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 01:09:58,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:09:59,174 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 01:09:59,174 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 01:09:59,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758107823] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 01:09:59,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 01:09:59,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2024-11-09 01:09:59,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49962813] [2024-11-09 01:09:59,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 01:09:59,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 01:09:59,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 01:09:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 01:09:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:09:59,177 INFO L87 Difference]: Start difference. First operand 23741 states and 28568 transitions. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 01:10:00,082 INFO L93 Difference]: Finished difference Result 48339 states and 58259 transitions. [2024-11-09 01:10:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 01:10:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 278 [2024-11-09 01:10:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 01:10:00,114 INFO L225 Difference]: With dead ends: 48339 [2024-11-09 01:10:00,114 INFO L226 Difference]: Without dead ends: 25600 [2024-11-09 01:10:00,130 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 01:10:00,130 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 01:10:00,131 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 59 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 01:10:00,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25600 states. [2024-11-09 01:10:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25600 to 21024. [2024-11-09 01:10:00,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21024 states, 21023 states have (on average 1.1957855681872236) internal successors, (25139), 21023 states have internal predecessors, (25139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:00,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21024 states to 21024 states and 25139 transitions. [2024-11-09 01:10:00,469 INFO L78 Accepts]: Start accepts. Automaton has 21024 states and 25139 transitions. Word has length 278 [2024-11-09 01:10:00,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 01:10:00,470 INFO L471 AbstractCegarLoop]: Abstraction has 21024 states and 25139 transitions. [2024-11-09 01:10:00,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 01:10:00,470 INFO L276 IsEmpty]: Start isEmpty. Operand 21024 states and 25139 transitions. [2024-11-09 01:10:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2024-11-09 01:10:00,492 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 01:10:00,492 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 01:10:00,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 01:10:00,693 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:00,693 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 01:10:00,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:10:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1025906804, now seen corresponding path program 1 times [2024-11-09 01:10:00,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 01:10:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847351606] [2024-11-09 01:10:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:00,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:10:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 148 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 01:10:01,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 01:10:01,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847351606] [2024-11-09 01:10:01,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847351606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 01:10:01,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235765477] [2024-11-09 01:10:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 01:10:01,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 01:10:01,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 01:10:01,665 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 01:10:01,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e5622ce7-2545-4361-92f5-bda0ea496f41/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 01:10:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:10:01,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 01:10:01,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:03,628 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:10:03,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 01:10:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 01:10:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235765477] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 01:10:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594654449] [2024-11-09 01:10:04,370 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-09 01:10:04,370 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 01:10:04,375 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 01:10:04,381 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 01:10:04,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 01:10:39,963 WARN L286 SmtUtils]: Spent 10.88s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-09 01:10:52,113 WARN L286 SmtUtils]: Spent 12.15s on a formula simplification that was a NOOP. DAG size: 868 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-09 01:11:53,452 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-09 01:12:20,709 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-09 01:12:20,838 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-09 01:12:48,286 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-09 01:16:35,499 WARN L286 SmtUtils]: Spent 3.78m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2024-11-09 01:20:42,339 WARN L286 SmtUtils]: Spent 4.11m on a formula simplification that was a NOOP. DAG size: 3750 (called from [L 210] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)