./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label38.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_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/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_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label38.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/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_399b7d86-3f8b-4649-9e2d-79746f51e914/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 d6ab095cb4c47e2e0ab83610e7dceb2c658ebc8f7a2b4be1c26690c64da4af60 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:16:05,447 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:16:05,529 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:16:05,540 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:16:05,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:16:05,592 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:16:05,596 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:16:05,600 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:16:05,601 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:16:05,601 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:16:05,601 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:16:05,602 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:16:05,602 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:16:05,603 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:16:05,603 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:16:05,603 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:16:05,604 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:16:05,604 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:16:05,605 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:16:05,605 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:16:05,606 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:16:05,607 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:16:05,607 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:16:05,608 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:16:05,608 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:16:05,609 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:16:05,609 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:16:05,609 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:16:05,610 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:16:05,610 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:16:05,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:16:05,611 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:16:05,612 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:16:05,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:16:05,612 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:16:05,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:16:05,613 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:16:05,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:16:05,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:05,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:16:05,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:16:05,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:16:05,620 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:16:05,620 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:16:05,620 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:16:05,620 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:16:05,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:16:05,621 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_399b7d86-3f8b-4649-9e2d-79746f51e914/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6ab095cb4c47e2e0ab83610e7dceb2c658ebc8f7a2b4be1c26690c64da4af60 [2024-11-09 05:16:05,958 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:16:05,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:16:06,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:16:06,004 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:16:06,004 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:16:06,006 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/eca-rers2012/Problem03_label38.c Unable to find full path for "g++" [2024-11-09 05:16:08,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:16:08,882 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:16:08,882 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/sv-benchmarks/c/eca-rers2012/Problem03_label38.c [2024-11-09 05:16:08,907 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/data/9fc1202f8/1f1a94191fa34bcb8470775570bf029e/FLAGe7db90047 [2024-11-09 05:16:08,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/data/9fc1202f8/1f1a94191fa34bcb8470775570bf029e [2024-11-09 05:16:08,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:16:08,945 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:16:08,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:08,948 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:16:08,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:16:08,957 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:08" (1/1) ... [2024-11-09 05:16:08,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dc9450c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:08, skipping insertion in model container [2024-11-09 05:16:08,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:16:08" (1/1) ... [2024-11-09 05:16:09,070 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:16:10,028 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_399b7d86-3f8b-4649-9e2d-79746f51e914/sv-benchmarks/c/eca-rers2012/Problem03_label38.c[61364,61377] [2024-11-09 05:16:10,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:10,087 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:16:10,428 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_399b7d86-3f8b-4649-9e2d-79746f51e914/sv-benchmarks/c/eca-rers2012/Problem03_label38.c[61364,61377] [2024-11-09 05:16:10,439 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:16:10,472 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:16:10,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10 WrapperNode [2024-11-09 05:16:10,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:16:10,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:10,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:16:10,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:16:10,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,545 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,680 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2024-11-09 05:16:10,680 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:16:10,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:16:10,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:16:10,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:16:10,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,707 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,708 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,790 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,831 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,863 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,890 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:16:10,891 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:16:10,891 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:16:10,891 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:16:10,892 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (1/1) ... [2024-11-09 05:16:10,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:16:10,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:10,935 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:16:10,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:16:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:16:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:16:10,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:16:10,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:16:11,248 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:16:11,251 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:16:14,000 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-09 05:16:14,001 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:16:14,587 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:16:14,588 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 05:16:14,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:14 BoogieIcfgContainer [2024-11-09 05:16:14,590 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:16:14,593 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:16:14,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:16:14,598 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:16:14,599 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:16:08" (1/3) ... [2024-11-09 05:16:14,600 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d9d397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:14, skipping insertion in model container [2024-11-09 05:16:14,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:16:10" (2/3) ... [2024-11-09 05:16:14,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41d9d397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:16:14, skipping insertion in model container [2024-11-09 05:16:14,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:16:14" (3/3) ... [2024-11-09 05:16:14,605 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2024-11-09 05:16:14,628 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:16:14,630 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-09 05:16:14,732 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:16:14,744 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;@7dc14ef8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:16:14,748 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-09 05:16:14,757 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 05:16:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-09 05:16:14,776 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:14,777 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 05:16:14,778 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:14,787 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:14,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1934939628, now seen corresponding path program 1 times [2024-11-09 05:16:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565988560] [2024-11-09 05:16:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:14,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:16,029 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 05:16:16,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565988560] [2024-11-09 05:16:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565988560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695603890] [2024-11-09 05:16:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:16,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:16,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:16,090 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 05:16:17,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:17,579 INFO L93 Difference]: Finished difference Result 440 states and 860 transitions. [2024-11-09 05:16:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:17,582 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 05:16:17,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:17,596 INFO L225 Difference]: With dead ends: 440 [2024-11-09 05:16:17,597 INFO L226 Difference]: Without dead ends: 289 [2024-11-09 05:16:17,601 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 05:16:17,606 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 29 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:17,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 51 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-09 05:16:17,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-09 05:16:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2024-11-09 05:16:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.7881944444444444) internal successors, (515), 288 states have internal predecessors, (515), 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 05:16:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 515 transitions. [2024-11-09 05:16:17,685 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 515 transitions. Word has length 143 [2024-11-09 05:16:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:17,691 INFO L471 AbstractCegarLoop]: Abstraction has 289 states and 515 transitions. [2024-11-09 05:16:17,691 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 05:16:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 515 transitions. [2024-11-09 05:16:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 05:16:17,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:17,696 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 05:16:17,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:16:17,697 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:17,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash 588551475, now seen corresponding path program 1 times [2024-11-09 05:16:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:17,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412964673] [2024-11-09 05:16:17,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:17,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:18,188 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 05:16:18,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:18,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412964673] [2024-11-09 05:16:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412964673] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:18,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:18,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50372172] [2024-11-09 05:16:18,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:18,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:18,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:18,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:18,195 INFO L87 Difference]: Start difference. First operand 289 states and 515 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 05:16:19,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:19,457 INFO L93 Difference]: Finished difference Result 863 states and 1542 transitions. [2024-11-09 05:16:19,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:19,458 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 05:16:19,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:19,462 INFO L225 Difference]: With dead ends: 863 [2024-11-09 05:16:19,463 INFO L226 Difference]: Without dead ends: 575 [2024-11-09 05:16:19,464 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 05:16:19,466 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 157 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:19,467 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 25 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:16:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-09 05:16:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2024-11-09 05:16:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 1.740418118466899) internal successors, (999), 574 states have internal predecessors, (999), 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 05:16:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 999 transitions. [2024-11-09 05:16:19,509 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 999 transitions. Word has length 151 [2024-11-09 05:16:19,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:19,509 INFO L471 AbstractCegarLoop]: Abstraction has 575 states and 999 transitions. [2024-11-09 05:16:19,510 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 05:16:19,510 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 999 transitions. [2024-11-09 05:16:19,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-11-09 05:16:19,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:19,517 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 05:16:19,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:16:19,518 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:19,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -656866150, now seen corresponding path program 1 times [2024-11-09 05:16:19,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:19,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128136819] [2024-11-09 05:16:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:19,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:20,154 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 05:16:20,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:20,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128136819] [2024-11-09 05:16:20,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128136819] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:20,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:20,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:16:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766880367] [2024-11-09 05:16:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:20,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:20,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:20,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:20,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:20,165 INFO L87 Difference]: Start difference. First operand 575 states and 999 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 05:16:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:21,257 INFO L93 Difference]: Finished difference Result 1721 states and 2994 transitions. [2024-11-09 05:16:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:21,258 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 05:16:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:21,263 INFO L225 Difference]: With dead ends: 1721 [2024-11-09 05:16:21,264 INFO L226 Difference]: Without dead ends: 1147 [2024-11-09 05:16:21,267 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 05:16:21,268 INFO L432 NwaCegarLoop]: 258 mSDtfsCounter, 151 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:21,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 262 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:16:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2024-11-09 05:16:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1147. [2024-11-09 05:16:21,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 1.4764397905759161) internal successors, (1692), 1146 states have internal predecessors, (1692), 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 05:16:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 1692 transitions. [2024-11-09 05:16:21,325 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 1692 transitions. Word has length 163 [2024-11-09 05:16:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:21,326 INFO L471 AbstractCegarLoop]: Abstraction has 1147 states and 1692 transitions. [2024-11-09 05:16:21,326 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 05:16:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 1692 transitions. [2024-11-09 05:16:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-11-09 05:16:21,335 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:21,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:21,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:16:21,342 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:21,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:21,342 INFO L85 PathProgramCache]: Analyzing trace with hash -379341474, now seen corresponding path program 1 times [2024-11-09 05:16:21,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:21,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845283988] [2024-11-09 05:16:21,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:21,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:21,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:21,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845283988] [2024-11-09 05:16:21,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845283988] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:21,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:21,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137308841] [2024-11-09 05:16:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:21,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:21,926 INFO L87 Difference]: Start difference. First operand 1147 states and 1692 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 05:16:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:23,026 INFO L93 Difference]: Finished difference Result 3439 states and 5074 transitions. [2024-11-09 05:16:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 166 [2024-11-09 05:16:23,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:23,036 INFO L225 Difference]: With dead ends: 3439 [2024-11-09 05:16:23,037 INFO L226 Difference]: Without dead ends: 2293 [2024-11-09 05:16:23,039 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 05:16:23,041 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 173 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:23,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 25 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:16:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2024-11-09 05:16:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2291. [2024-11-09 05:16:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2291 states, 2290 states have (on average 1.456768558951965) internal successors, (3336), 2290 states have internal predecessors, (3336), 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 05:16:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2291 states to 2291 states and 3336 transitions. [2024-11-09 05:16:23,109 INFO L78 Accepts]: Start accepts. Automaton has 2291 states and 3336 transitions. Word has length 166 [2024-11-09 05:16:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:23,109 INFO L471 AbstractCegarLoop]: Abstraction has 2291 states and 3336 transitions. [2024-11-09 05:16:23,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 05:16:23,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2291 states and 3336 transitions. [2024-11-09 05:16:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-11-09 05:16:23,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:23,117 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:23,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:16:23,118 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:23,119 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:23,119 INFO L85 PathProgramCache]: Analyzing trace with hash 998028735, now seen corresponding path program 1 times [2024-11-09 05:16:23,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:23,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356945675] [2024-11-09 05:16:23,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:23,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:23,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:23,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356945675] [2024-11-09 05:16:23,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356945675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:23,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:23,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:23,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551362050] [2024-11-09 05:16:23,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:23,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:23,618 INFO L87 Difference]: Start difference. First operand 2291 states and 3336 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 05:16:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:24,701 INFO L93 Difference]: Finished difference Result 6871 states and 10006 transitions. [2024-11-09 05:16:24,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:24,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 169 [2024-11-09 05:16:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:24,722 INFO L225 Difference]: With dead ends: 6871 [2024-11-09 05:16:24,723 INFO L226 Difference]: Without dead ends: 4581 [2024-11-09 05:16:24,727 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 05:16:24,728 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 131 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:24,729 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 74 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:16:24,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2024-11-09 05:16:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4007. [2024-11-09 05:16:24,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4772840738891662) internal successors, (5918), 4006 states have internal predecessors, (5918), 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 05:16:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5918 transitions. [2024-11-09 05:16:24,896 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5918 transitions. Word has length 169 [2024-11-09 05:16:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:24,897 INFO L471 AbstractCegarLoop]: Abstraction has 4007 states and 5918 transitions. [2024-11-09 05:16:24,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 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 05:16:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5918 transitions. [2024-11-09 05:16:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2024-11-09 05:16:24,911 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:24,912 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 05:16:24,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:16:24,913 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:24,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash -257381369, now seen corresponding path program 1 times [2024-11-09 05:16:24,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:24,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84328111] [2024-11-09 05:16:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:24,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:25,241 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 05:16:25,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:25,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84328111] [2024-11-09 05:16:25,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84328111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:25,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:25,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:25,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251872514] [2024-11-09 05:16:25,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:25,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:25,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:25,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:25,246 INFO L87 Difference]: Start difference. First operand 4007 states and 5918 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 05:16:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:25,872 INFO L93 Difference]: Finished difference Result 8013 states and 11835 transitions. [2024-11-09 05:16:25,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:25,873 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 05:16:25,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:25,890 INFO L225 Difference]: With dead ends: 8013 [2024-11-09 05:16:25,891 INFO L226 Difference]: Without dead ends: 4007 [2024-11-09 05:16:25,896 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 05:16:25,897 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:25,898 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 4 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:16:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2024-11-09 05:16:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 4007. [2024-11-09 05:16:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4007 states, 4006 states have (on average 1.4231153270094858) internal successors, (5701), 4006 states have internal predecessors, (5701), 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 05:16:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4007 states to 4007 states and 5701 transitions. [2024-11-09 05:16:26,063 INFO L78 Accepts]: Start accepts. Automaton has 4007 states and 5701 transitions. Word has length 176 [2024-11-09 05:16:26,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:26,065 INFO L471 AbstractCegarLoop]: Abstraction has 4007 states and 5701 transitions. [2024-11-09 05:16:26,066 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 05:16:26,066 INFO L276 IsEmpty]: Start isEmpty. Operand 4007 states and 5701 transitions. [2024-11-09 05:16:26,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2024-11-09 05:16:26,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:26,076 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:26,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:16:26,077 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:26,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1954799545, now seen corresponding path program 1 times [2024-11-09 05:16:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:26,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208736312] [2024-11-09 05:16:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:26,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:26,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:26,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208736312] [2024-11-09 05:16:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208736312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134519574] [2024-11-09 05:16:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:26,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:26,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:26,780 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:26,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:16:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:27,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:16:27,031 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:16:27,119 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:16:27,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134519574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:27,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:16:27,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2024-11-09 05:16:27,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337764178] [2024-11-09 05:16:27,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:27,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:27,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:27,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:27,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:16:27,123 INFO L87 Difference]: Start difference. First operand 4007 states and 5701 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 05:16:28,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:28,320 INFO L93 Difference]: Finished difference Result 12017 states and 17100 transitions. [2024-11-09 05:16:28,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:28,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 180 [2024-11-09 05:16:28,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:28,356 INFO L225 Difference]: With dead ends: 12017 [2024-11-09 05:16:28,356 INFO L226 Difference]: Without dead ends: 8011 [2024-11-09 05:16:28,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 179 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 05:16:28,364 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 143 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:28,365 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 62 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:16:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8011 states. [2024-11-09 05:16:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8011 to 7725. [2024-11-09 05:16:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7725 states, 7724 states have (on average 1.3851631279129983) internal successors, (10699), 7724 states have internal predecessors, (10699), 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 05:16:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7725 states to 7725 states and 10699 transitions. [2024-11-09 05:16:28,597 INFO L78 Accepts]: Start accepts. Automaton has 7725 states and 10699 transitions. Word has length 180 [2024-11-09 05:16:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:28,598 INFO L471 AbstractCegarLoop]: Abstraction has 7725 states and 10699 transitions. [2024-11-09 05:16:28,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 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 05:16:28,600 INFO L276 IsEmpty]: Start isEmpty. Operand 7725 states and 10699 transitions. [2024-11-09 05:16:28,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-09 05:16:28,644 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:28,645 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 05:16:28,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:16:28,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:16:28,846 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:28,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash -267832534, now seen corresponding path program 1 times [2024-11-09 05:16:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:28,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217660217] [2024-11-09 05:16:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:29,588 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 05:16:29,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217660217] [2024-11-09 05:16:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217660217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:29,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739041125] [2024-11-09 05:16:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:29,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:29,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:29,593 INFO L87 Difference]: Start difference. First operand 7725 states and 10699 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 05:16:30,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:30,833 INFO L93 Difference]: Finished difference Result 17308 states and 23900 transitions. [2024-11-09 05:16:30,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:30,834 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 05:16:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:30,871 INFO L225 Difference]: With dead ends: 17308 [2024-11-09 05:16:30,871 INFO L226 Difference]: Without dead ends: 9584 [2024-11-09 05:16:30,881 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 05:16:30,882 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:30,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 80 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:16:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9584 states. [2024-11-09 05:16:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9584 to 9584. [2024-11-09 05:16:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9584 states, 9583 states have (on average 1.3691954502765313) internal successors, (13121), 9583 states have internal predecessors, (13121), 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 05:16:31,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9584 states to 9584 states and 13121 transitions. [2024-11-09 05:16:31,114 INFO L78 Accepts]: Start accepts. Automaton has 9584 states and 13121 transitions. Word has length 184 [2024-11-09 05:16:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:31,115 INFO L471 AbstractCegarLoop]: Abstraction has 9584 states and 13121 transitions. [2024-11-09 05:16:31,116 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 05:16:31,116 INFO L276 IsEmpty]: Start isEmpty. Operand 9584 states and 13121 transitions. [2024-11-09 05:16:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2024-11-09 05:16:31,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:31,132 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 05:16:31,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 05:16:31,133 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:31,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:31,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1466490200, now seen corresponding path program 1 times [2024-11-09 05:16:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:31,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503804486] [2024-11-09 05:16:31,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:31,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:31,982 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 05:16:31,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:31,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503804486] [2024-11-09 05:16:31,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503804486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:31,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288587045] [2024-11-09 05:16:31,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:31,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:31,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:31,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:31,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:16:32,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:32,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:16:32,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:32,630 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 05:16:32,631 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:16:32,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288587045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:32,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:16:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 05:16:32,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596089516] [2024-11-09 05:16:32,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:32,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:32,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:16:32,634 INFO L87 Difference]: Start difference. First operand 9584 states and 13121 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 05:16:33,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:33,832 INFO L93 Difference]: Finished difference Result 23743 states and 32744 transitions. [2024-11-09 05:16:33,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:33,833 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 05:16:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:33,868 INFO L225 Difference]: With dead ends: 23743 [2024-11-09 05:16:33,868 INFO L226 Difference]: Without dead ends: 14732 [2024-11-09 05:16:33,882 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 05:16:33,883 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:33,883 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 236 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:16:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2024-11-09 05:16:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 14732. [2024-11-09 05:16:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 1.3383341253139638) internal successors, (19715), 14731 states have internal predecessors, (19715), 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 05:16:34,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 19715 transitions. [2024-11-09 05:16:34,210 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 19715 transitions. Word has length 191 [2024-11-09 05:16:34,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:34,211 INFO L471 AbstractCegarLoop]: Abstraction has 14732 states and 19715 transitions. [2024-11-09 05:16:34,211 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 05:16:34,211 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 19715 transitions. [2024-11-09 05:16:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-11-09 05:16:34,235 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:34,235 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:34,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:16:34,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:34,437 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:34,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:34,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1914266468, now seen corresponding path program 1 times [2024-11-09 05:16:34,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:34,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003987981] [2024-11-09 05:16:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 72 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 05:16:35,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003987981] [2024-11-09 05:16:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003987981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213205125] [2024-11-09 05:16:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:35,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:35,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:35,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:16:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:35,751 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:16:35,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:16:35,825 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:16:35,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213205125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:35,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:16:35,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 05:16:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988779300] [2024-11-09 05:16:35,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:35,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:35,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:16:35,829 INFO L87 Difference]: Start difference. First operand 14732 states and 19715 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 05:16:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:37,083 INFO L93 Difference]: Finished difference Result 32895 states and 44799 transitions. [2024-11-09 05:16:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:37,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 210 [2024-11-09 05:16:37,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:37,123 INFO L225 Difference]: With dead ends: 32895 [2024-11-09 05:16:37,124 INFO L226 Difference]: Without dead ends: 18307 [2024-11-09 05:16:37,140 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:16:37,141 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 137 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:37,142 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 85 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:16:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18307 states. [2024-11-09 05:16:37,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18307 to 15161. [2024-11-09 05:16:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 1.2730211081794196) internal successors, (19299), 15160 states have internal predecessors, (19299), 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 05:16:37,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 19299 transitions. [2024-11-09 05:16:37,455 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 19299 transitions. Word has length 210 [2024-11-09 05:16:37,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:37,456 INFO L471 AbstractCegarLoop]: Abstraction has 15161 states and 19299 transitions. [2024-11-09 05:16:37,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 05:16:37,456 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 19299 transitions. [2024-11-09 05:16:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2024-11-09 05:16:37,476 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:37,477 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 05:16:37,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:16:37,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:37,682 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:37,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 34328172, now seen corresponding path program 1 times [2024-11-09 05:16:37,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:37,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937396907] [2024-11-09 05:16:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:37,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:39,749 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 05:16:39,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937396907] [2024-11-09 05:16:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937396907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664278921] [2024-11-09 05:16:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:39,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:39,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:39,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:16:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:40,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:16:40,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:40,486 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 05:16:40,486 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:40,787 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 05:16:40,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664278921] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:40,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:16:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2024-11-09 05:16:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279337295] [2024-11-09 05:16:40,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:40,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:16:40,790 INFO L87 Difference]: Start difference. First operand 15161 states and 19299 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 05:16:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:41,872 INFO L93 Difference]: Finished difference Result 32895 states and 42164 transitions. [2024-11-09 05:16:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:41,873 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 05:16:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:41,911 INFO L225 Difference]: With dead ends: 32895 [2024-11-09 05:16:41,911 INFO L226 Difference]: Without dead ends: 17878 [2024-11-09 05:16:41,928 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 05:16:41,929 INFO L432 NwaCegarLoop]: 259 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:41,929 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 275 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:16:41,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17878 states. [2024-11-09 05:16:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17878 to 17878. [2024-11-09 05:16:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17878 states, 17877 states have (on average 1.2668232924987415) internal successors, (22647), 17877 states have internal predecessors, (22647), 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 05:16:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17878 states to 17878 states and 22647 transitions. [2024-11-09 05:16:42,334 INFO L78 Accepts]: Start accepts. Automaton has 17878 states and 22647 transitions. Word has length 221 [2024-11-09 05:16:42,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:42,335 INFO L471 AbstractCegarLoop]: Abstraction has 17878 states and 22647 transitions. [2024-11-09 05:16:42,336 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 05:16:42,336 INFO L276 IsEmpty]: Start isEmpty. Operand 17878 states and 22647 transitions. [2024-11-09 05:16:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2024-11-09 05:16:42,364 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:42,364 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 05:16:42,389 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:16:42,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:16:42,565 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:42,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2101606204, now seen corresponding path program 1 times [2024-11-09 05:16:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:42,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354109344] [2024-11-09 05:16:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:42,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:43,467 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 05:16:43,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:43,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354109344] [2024-11-09 05:16:43,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354109344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:16:43,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:16:43,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 05:16:43,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396370915] [2024-11-09 05:16:43,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:16:43,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:16:43,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:16:43,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:16:43,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:16:43,472 INFO L87 Difference]: Start difference. First operand 17878 states and 22647 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 05:16:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:16:44,716 INFO L93 Difference]: Finished difference Result 40188 states and 50887 transitions. [2024-11-09 05:16:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:16:44,717 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 05:16:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:16:44,772 INFO L225 Difference]: With dead ends: 40188 [2024-11-09 05:16:44,773 INFO L226 Difference]: Without dead ends: 22454 [2024-11-09 05:16:44,791 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 05:16:44,792 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 27 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:16:44,792 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 59 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 05:16:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22454 states. [2024-11-09 05:16:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22454 to 22454. [2024-11-09 05:16:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22454 states, 22453 states have (on average 1.2583173740702802) internal successors, (28253), 22453 states have internal predecessors, (28253), 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 05:16:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22454 states to 22454 states and 28253 transitions. [2024-11-09 05:16:45,219 INFO L78 Accepts]: Start accepts. Automaton has 22454 states and 28253 transitions. Word has length 267 [2024-11-09 05:16:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:16:45,220 INFO L471 AbstractCegarLoop]: Abstraction has 22454 states and 28253 transitions. [2024-11-09 05:16:45,220 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 05:16:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 22454 states and 28253 transitions. [2024-11-09 05:16:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2024-11-09 05:16:45,247 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:16:45,247 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 05:16:45,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 05:16:45,248 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:16:45,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:16:45,248 INFO L85 PathProgramCache]: Analyzing trace with hash 860255959, now seen corresponding path program 1 times [2024-11-09 05:16:45,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:16:45,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403668333] [2024-11-09 05:16:45,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:45,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:16:45,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:46,321 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 6 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:16:46,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:16:46,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403668333] [2024-11-09 05:16:46,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403668333] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:16:46,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832485337] [2024-11-09 05:16:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:16:46,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:16:46,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:16:46,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:16:46,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_399b7d86-3f8b-4649-9e2d-79746f51e914/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:16:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:16:46,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:16:46,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:16:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:16:47,159 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:16:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 05:16:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832485337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:16:47,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666335856] [2024-11-09 05:16:47,699 INFO L159 IcfgInterpreter]: Started Sifa with 145 locations of interest [2024-11-09 05:16:47,699 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:16:47,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:16:47,709 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:16:47,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:17:20,538 WARN L286 SmtUtils]: Spent 10.77s 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 05:17:30,685 WARN L286 SmtUtils]: Spent 10.14s 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 05:18:26,978 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-09 05:18:43,215 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-09 05:18:43,360 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 13408 conjunctions. This might take some time... [2024-11-09 05:19:02,201 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 13408 conjunctions. [2024-11-09 05:22:48,342 WARN L286 SmtUtils]: Spent 3.76m 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 05:26:43,227 WARN L286 SmtUtils]: Spent 3.91m 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)