./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/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_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/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_5463b947-7653-441c-8608-4b1b3d554ae0/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 b445a4f49d9151eb44c8190083d36f280681906d4dfab457d725a1f68c1551d8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:23:30,472 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:23:30,556 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:23:30,561 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:23:30,562 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:23:30,587 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:23:30,588 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:23:30,588 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:23:30,589 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:23:30,589 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:23:30,590 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:23:30,590 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:23:30,591 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:23:30,591 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:23:30,591 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:23:30,592 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:23:30,592 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:23:30,593 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:23:30,593 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:23:30,594 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:23:30,594 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:23:30,595 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:23:30,595 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:23:30,596 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:23:30,596 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:23:30,596 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:23:30,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:23:30,597 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:23:30,597 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:23:30,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:23:30,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:23:30,598 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:23:30,599 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:23:30,599 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:23:30,599 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:23:30,600 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:23:30,600 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:23:30,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:23:30,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:23:30,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:23:30,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:23:30,603 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:23:30,604 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:23:30,604 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:23:30,604 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:23:30,604 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:23:30,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:23:30,605 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_5463b947-7653-441c-8608-4b1b3d554ae0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b445a4f49d9151eb44c8190083d36f280681906d4dfab457d725a1f68c1551d8 [2024-11-09 05:23:30,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:23:30,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:23:30,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:23:30,863 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:23:30,864 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:23:30,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c Unable to find full path for "g++" [2024-11-09 05:23:32,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:23:33,628 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:23:33,630 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c [2024-11-09 05:23:33,685 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/data/9a14365fb/81b7149653064c3296987158040ab42a/FLAG51253288a [2024-11-09 05:23:33,709 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/data/9a14365fb/81b7149653064c3296987158040ab42a [2024-11-09 05:23:33,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:23:33,715 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:23:33,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:23:33,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:23:33,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:23:33,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:23:33" (1/1) ... [2024-11-09 05:23:33,727 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b0585cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:33, skipping insertion in model container [2024-11-09 05:23:33,727 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:23:33" (1/1) ... [2024-11-09 05:23:33,962 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:23:36,210 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_5463b947-7653-441c-8608-4b1b3d554ae0/sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c[380323,380336] [2024-11-09 05:23:36,244 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_5463b947-7653-441c-8608-4b1b3d554ae0/sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c[383339,383352] [2024-11-09 05:23:36,615 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:23:36,631 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:23:37,894 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_5463b947-7653-441c-8608-4b1b3d554ae0/sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c[380323,380336] [2024-11-09 05:23:37,899 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_5463b947-7653-441c-8608-4b1b3d554ae0/sv-benchmarks/c/combinations/Problem05_label45+token_ring.09.cil-2.c[383339,383352] [2024-11-09 05:23:37,922 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:23:38,031 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:23:38,031 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38 WrapperNode [2024-11-09 05:23:38,032 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:23:38,033 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:23:38,033 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:23:38,033 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:23:38,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,529 INFO L138 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 13046 [2024-11-09 05:23:38,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:23:38,538 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:23:38,538 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:23:38,538 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:23:38,564 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,631 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,940 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:38,990 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:39,019 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:39,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:39,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:23:39,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:23:39,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:23:39,184 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:23:39,185 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (1/1) ... [2024-11-09 05:23:39,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:23:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:39,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:23:39,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:23:39,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:23:39,328 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 05:23:39,329 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 05:23:39,329 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:23:39,330 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:23:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 05:23:39,330 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 05:23:39,330 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 05:23:39,330 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 05:23:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 05:23:39,331 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 05:23:39,331 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 05:23:39,347 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 05:23:39,347 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 05:23:39,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 05:23:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:23:39,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:23:39,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:23:39,592 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:23:39,594 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:23:49,534 INFO L? ?]: Removed 1741 outVars from TransFormulas that were not future-live. [2024-11-09 05:23:49,534 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:23:52,408 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:23:52,409 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-09 05:23:52,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:23:52 BoogieIcfgContainer [2024-11-09 05:23:52,410 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:23:52,413 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:23:52,413 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:23:52,416 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:23:52,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:23:33" (1/3) ... [2024-11-09 05:23:52,418 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2085117e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:23:52, skipping insertion in model container [2024-11-09 05:23:52,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:23:38" (2/3) ... [2024-11-09 05:23:52,419 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2085117e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:23:52, skipping insertion in model container [2024-11-09 05:23:52,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:23:52" (3/3) ... [2024-11-09 05:23:52,420 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.09.cil-2.c [2024-11-09 05:23:52,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:23:52,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:23:52,558 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:23:52,563 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;@7cb5dd59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:23:52,563 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:23:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand has 1814 states, 1779 states have (on average 1.956717256885891) internal successors, (3481), 1784 states have internal predecessors, (3481), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 05:23:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-09 05:23:52,585 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:23:52,586 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] [2024-11-09 05:23:52,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:23:52,592 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:23:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash 443031527, now seen corresponding path program 1 times [2024-11-09 05:23:52,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:23:52,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259362961] [2024-11-09 05:23:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:52,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:23:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:53,219 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 05:23:53,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:53,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259362961] [2024-11-09 05:23:53,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259362961] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:23:53,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:23:53,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:23:53,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352600339] [2024-11-09 05:23:53,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:23:53,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:23:53,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:23:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:23:53,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:23:53,269 INFO L87 Difference]: Start difference. First operand has 1814 states, 1779 states have (on average 1.956717256885891) internal successors, (3481), 1784 states have internal predecessors, (3481), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:23:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:23:54,587 INFO L93 Difference]: Finished difference Result 3775 states and 7309 transitions. [2024-11-09 05:23:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:23:54,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2024-11-09 05:23:54,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:23:54,614 INFO L225 Difference]: With dead ends: 3775 [2024-11-09 05:23:54,614 INFO L226 Difference]: Without dead ends: 1960 [2024-11-09 05:23:54,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:23:54,626 INFO L432 NwaCegarLoop]: 3448 mSDtfsCounter, 3708 mSDsluCounter, 3360 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3708 SdHoareTripleChecker+Valid, 6808 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:23:54,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3708 Valid, 6808 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:23:54,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2024-11-09 05:23:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1959. [2024-11-09 05:23:54,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1959 states, 1901 states have (on average 1.9200420831141505) internal successors, (3650), 1905 states have internal predecessors, (3650), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-09 05:23:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1959 states to 1959 states and 3736 transitions. [2024-11-09 05:23:54,916 INFO L78 Accepts]: Start accepts. Automaton has 1959 states and 3736 transitions. Word has length 59 [2024-11-09 05:23:54,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:23:54,917 INFO L471 AbstractCegarLoop]: Abstraction has 1959 states and 3736 transitions. [2024-11-09 05:23:54,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:23:54,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1959 states and 3736 transitions. [2024-11-09 05:23:54,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:23:54,930 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:23:54,931 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] [2024-11-09 05:23:54,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:23:54,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:23:54,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:23:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1660167665, now seen corresponding path program 1 times [2024-11-09 05:23:54,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:23:54,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459103553] [2024-11-09 05:23:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:54,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:23:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:55,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:23:55,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:55,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459103553] [2024-11-09 05:23:55,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459103553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:23:55,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937006447] [2024-11-09 05:23:55,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:55,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:55,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:55,345 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:23:55,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:23:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:55,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:23:55,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:23:55,714 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:23:55,715 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:23:55,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937006447] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:23:55,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:23:55,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:23:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876168222] [2024-11-09 05:23:55,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:23:55,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:23:55,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:23:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:23:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:55,719 INFO L87 Difference]: Start difference. First operand 1959 states and 3736 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:56,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:23:56,333 INFO L93 Difference]: Finished difference Result 2578 states and 4669 transitions. [2024-11-09 05:23:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:23:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-09 05:23:56,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:23:56,372 INFO L225 Difference]: With dead ends: 2578 [2024-11-09 05:23:56,373 INFO L226 Difference]: Without dead ends: 2265 [2024-11-09 05:23:56,376 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:56,377 INFO L432 NwaCegarLoop]: 3315 mSDtfsCounter, 3471 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:23:56,378 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3471 Valid, 3512 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:23:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2024-11-09 05:23:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 2259. [2024-11-09 05:23:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2259 states, 2153 states have (on average 1.8657686948444032) internal successors, (4017), 2158 states have internal predecessors, (4017), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2024-11-09 05:23:56,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2259 states to 2259 states and 4175 transitions. [2024-11-09 05:23:56,464 INFO L78 Accepts]: Start accepts. Automaton has 2259 states and 4175 transitions. Word has length 117 [2024-11-09 05:23:56,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:23:56,466 INFO L471 AbstractCegarLoop]: Abstraction has 2259 states and 4175 transitions. [2024-11-09 05:23:56,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2259 states and 4175 transitions. [2024-11-09 05:23:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:23:56,475 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:23:56,475 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] [2024-11-09 05:23:56,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:23:56,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-09 05:23:56,676 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:23:56,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:23:56,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1048330509, now seen corresponding path program 1 times [2024-11-09 05:23:56,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:23:56,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840415266] [2024-11-09 05:23:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:56,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:23:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:23:56,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:56,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840415266] [2024-11-09 05:23:56,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840415266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:23:56,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738532986] [2024-11-09 05:23:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:56,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:56,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:56,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:23:56,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:23:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:57,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:23:57,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:23:57,213 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:23:57,213 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:23:57,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738532986] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:23:57,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:23:57,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:23:57,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424404619] [2024-11-09 05:23:57,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:23:57,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:23:57,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:23:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:23:57,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:57,219 INFO L87 Difference]: Start difference. First operand 2259 states and 4175 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:23:57,882 INFO L93 Difference]: Finished difference Result 3472 states and 5998 transitions. [2024-11-09 05:23:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:23:57,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-09 05:23:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:23:57,905 INFO L225 Difference]: With dead ends: 3472 [2024-11-09 05:23:57,905 INFO L226 Difference]: Without dead ends: 2859 [2024-11-09 05:23:57,913 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:57,914 INFO L432 NwaCegarLoop]: 3313 mSDtfsCounter, 3489 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3489 SdHoareTripleChecker+Valid, 3510 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:23:57,914 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3489 Valid, 3510 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:23:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2024-11-09 05:23:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2851. [2024-11-09 05:23:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2651 states have (on average 1.7876273104488871) internal successors, (4739), 2658 states have internal predecessors, (4739), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2024-11-09 05:23:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 5037 transitions. [2024-11-09 05:23:58,078 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 5037 transitions. Word has length 117 [2024-11-09 05:23:58,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:23:58,079 INFO L471 AbstractCegarLoop]: Abstraction has 2851 states and 5037 transitions. [2024-11-09 05:23:58,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:58,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 5037 transitions. [2024-11-09 05:23:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:23:58,084 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:23:58,085 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] [2024-11-09 05:23:58,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:23:58,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:58,289 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:23:58,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:23:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1441539211, now seen corresponding path program 1 times [2024-11-09 05:23:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:23:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212284923] [2024-11-09 05:23:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:23:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:23:58,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:58,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212284923] [2024-11-09 05:23:58,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212284923] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:23:58,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655633547] [2024-11-09 05:23:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:58,519 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:23:58,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:23:58,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:58,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:23:58,756 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:23:58,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:23:58,818 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:23:58,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655633547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:23:58,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:23:58,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:23:58,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970969984] [2024-11-09 05:23:58,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:23:58,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:23:58,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:23:58,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:23:58,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:58,822 INFO L87 Difference]: Start difference. First operand 2851 states and 5037 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:23:59,477 INFO L93 Difference]: Finished difference Result 5236 states and 8606 transitions. [2024-11-09 05:23:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:23:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-09 05:23:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:23:59,495 INFO L225 Difference]: With dead ends: 5236 [2024-11-09 05:23:59,495 INFO L226 Difference]: Without dead ends: 4031 [2024-11-09 05:23:59,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:23:59,501 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3483 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3483 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:23:59,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3483 Valid, 3458 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:23:59,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2024-11-09 05:23:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 4019. [2024-11-09 05:23:59,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4019 states, 3635 states have (on average 1.694360385144429) internal successors, (6159), 3646 states have internal predecessors, (6159), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2024-11-09 05:23:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4019 states to 4019 states and 6729 transitions. [2024-11-09 05:23:59,641 INFO L78 Accepts]: Start accepts. Automaton has 4019 states and 6729 transitions. Word has length 117 [2024-11-09 05:23:59,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:23:59,642 INFO L471 AbstractCegarLoop]: Abstraction has 4019 states and 6729 transitions. [2024-11-09 05:23:59,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:23:59,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4019 states and 6729 transitions. [2024-11-09 05:23:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:23:59,648 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:23:59,648 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] [2024-11-09 05:23:59,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:23:59,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:59,849 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:23:59,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:23:59,850 INFO L85 PathProgramCache]: Analyzing trace with hash -703856265, now seen corresponding path program 1 times [2024-11-09 05:23:59,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:23:59,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660711061] [2024-11-09 05:23:59,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:59,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:23:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:23:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:23:59,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:23:59,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660711061] [2024-11-09 05:23:59,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660711061] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:23:59,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768757934] [2024-11-09 05:23:59,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:23:59,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:23:59,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:23:59,997 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:23:59,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:24:00,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:00,192 INFO L255 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:24:00,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:24:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 05:24:00,250 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:24:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768757934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:00,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:24:00,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:24:00,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345550600] [2024-11-09 05:24:00,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:00,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:00,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:00,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:00,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:24:00,254 INFO L87 Difference]: Start difference. First operand 4019 states and 6729 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:24:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:00,924 INFO L93 Difference]: Finished difference Result 8716 states and 13722 transitions. [2024-11-09 05:24:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:00,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-09 05:24:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:00,959 INFO L225 Difference]: With dead ends: 8716 [2024-11-09 05:24:00,959 INFO L226 Difference]: Without dead ends: 6343 [2024-11-09 05:24:00,971 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:24:00,972 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3492 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3492 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:00,972 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3492 Valid, 3458 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:24:00,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2024-11-09 05:24:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6323. [2024-11-09 05:24:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6323 states, 5579 states have (on average 1.604409392364223) internal successors, (8951), 5598 states have internal predecessors, (8951), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2024-11-09 05:24:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 10049 transitions. [2024-11-09 05:24:01,286 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 10049 transitions. Word has length 117 [2024-11-09 05:24:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:01,287 INFO L471 AbstractCegarLoop]: Abstraction has 6323 states and 10049 transitions. [2024-11-09 05:24:01,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:24:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 10049 transitions. [2024-11-09 05:24:01,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:24:01,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:01,298 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] [2024-11-09 05:24:01,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 05:24:01,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:24:01,500 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:01,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:01,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1886485941, now seen corresponding path program 1 times [2024-11-09 05:24:01,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:01,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356626863] [2024-11-09 05:24:01,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:01,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:24:01,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356626863] [2024-11-09 05:24:01,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356626863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:24:01,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47136763] [2024-11-09 05:24:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:01,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:24:01,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:24:01,740 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:24:01,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:24:01,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:01,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:24:01,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:24:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:24:01,993 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:24:01,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47136763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:01,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:24:01,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:24:01,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303313623] [2024-11-09 05:24:01,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:01,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:01,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:01,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:01,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:24:01,996 INFO L87 Difference]: Start difference. First operand 6323 states and 10049 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:24:02,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:02,763 INFO L93 Difference]: Finished difference Result 15580 states and 23754 transitions. [2024-11-09 05:24:02,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:02,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 117 [2024-11-09 05:24:02,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:02,846 INFO L225 Difference]: With dead ends: 15580 [2024-11-09 05:24:02,846 INFO L226 Difference]: Without dead ends: 10903 [2024-11-09 05:24:02,866 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:24:02,867 INFO L432 NwaCegarLoop]: 3261 mSDtfsCounter, 3477 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3477 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:02,868 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3477 Valid, 3458 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:24:02,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10903 states. [2024-11-09 05:24:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10903 to 10867. [2024-11-09 05:24:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10867 states, 9419 states have (on average 1.5329652829387408) internal successors, (14439), 9454 states have internal predecessors, (14439), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2024-11-09 05:24:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10867 states to 10867 states and 16561 transitions. [2024-11-09 05:24:03,317 INFO L78 Accepts]: Start accepts. Automaton has 10867 states and 16561 transitions. Word has length 117 [2024-11-09 05:24:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:03,317 INFO L471 AbstractCegarLoop]: Abstraction has 10867 states and 16561 transitions. [2024-11-09 05:24:03,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 05:24:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10867 states and 16561 transitions. [2024-11-09 05:24:03,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-11-09 05:24:03,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:03,333 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] [2024-11-09 05:24:03,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:24:03,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:24:03,537 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:03,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1794559287, now seen corresponding path program 1 times [2024-11-09 05:24:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931847300] [2024-11-09 05:24:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 05:24:03,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931847300] [2024-11-09 05:24:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931847300] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920194577] [2024-11-09 05:24:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:03,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:03,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:03,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:03,692 INFO L87 Difference]: Start difference. First operand 10867 states and 16561 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:24:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:04,791 INFO L93 Difference]: Finished difference Result 18199 states and 27444 transitions. [2024-11-09 05:24:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:04,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2024-11-09 05:24:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:04,848 INFO L225 Difference]: With dead ends: 18199 [2024-11-09 05:24:04,848 INFO L226 Difference]: Without dead ends: 13459 [2024-11-09 05:24:04,862 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 05:24:04,863 INFO L432 NwaCegarLoop]: 3375 mSDtfsCounter, 109 mSDsluCounter, 3271 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6646 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:04,863 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6646 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:24:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13459 states. [2024-11-09 05:24:05,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13459 to 12771. [2024-11-09 05:24:05,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12771 states, 11259 states have (on average 1.5439204192201794) internal successors, (17383), 11294 states have internal predecessors, (17383), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2024-11-09 05:24:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12771 states to 12771 states and 19569 transitions. [2024-11-09 05:24:05,379 INFO L78 Accepts]: Start accepts. Automaton has 12771 states and 19569 transitions. Word has length 117 [2024-11-09 05:24:05,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:05,380 INFO L471 AbstractCegarLoop]: Abstraction has 12771 states and 19569 transitions. [2024-11-09 05:24:05,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:24:05,381 INFO L276 IsEmpty]: Start isEmpty. Operand 12771 states and 19569 transitions. [2024-11-09 05:24:05,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:24:05,411 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:05,411 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:24:05,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:24:05,411 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:05,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:05,412 INFO L85 PathProgramCache]: Analyzing trace with hash -380399098, now seen corresponding path program 1 times [2024-11-09 05:24:05,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:05,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294756218] [2024-11-09 05:24:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:05,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 05:24:05,544 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294756218] [2024-11-09 05:24:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294756218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:05,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:05,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85511161] [2024-11-09 05:24:05,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:05,547 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:05,548 INFO L87 Difference]: Start difference. First operand 12771 states and 19569 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:06,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:06,757 INFO L93 Difference]: Finished difference Result 34732 states and 52250 transitions. [2024-11-09 05:24:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-09 05:24:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:06,847 INFO L225 Difference]: With dead ends: 34732 [2024-11-09 05:24:06,847 INFO L226 Difference]: Without dead ends: 23607 [2024-11-09 05:24:06,875 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 05:24:06,876 INFO L432 NwaCegarLoop]: 3263 mSDtfsCounter, 3478 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3478 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:06,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3478 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:24:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23607 states. [2024-11-09 05:24:07,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23607 to 23507. [2024-11-09 05:24:07,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23507 states, 20555 states have (on average 1.501094624179032) internal successors, (30855), 20622 states have internal predecessors, (30855), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2024-11-09 05:24:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23507 states to 23507 states and 35089 transitions. [2024-11-09 05:24:07,788 INFO L78 Accepts]: Start accepts. Automaton has 23507 states and 35089 transitions. Word has length 159 [2024-11-09 05:24:07,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:07,789 INFO L471 AbstractCegarLoop]: Abstraction has 23507 states and 35089 transitions. [2024-11-09 05:24:07,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:07,789 INFO L276 IsEmpty]: Start isEmpty. Operand 23507 states and 35089 transitions. [2024-11-09 05:24:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:24:07,845 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:07,846 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:24:07,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 05:24:07,846 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:07,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:07,846 INFO L85 PathProgramCache]: Analyzing trace with hash -760808176, now seen corresponding path program 1 times [2024-11-09 05:24:07,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:07,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777979206] [2024-11-09 05:24:07,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:07,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:07,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:07,964 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 05:24:07,965 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:07,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777979206] [2024-11-09 05:24:07,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777979206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:07,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:07,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:07,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413966803] [2024-11-09 05:24:07,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:07,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:07,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:07,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:07,967 INFO L87 Difference]: Start difference. First operand 23507 states and 35089 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:10,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:10,002 INFO L93 Difference]: Finished difference Result 66652 states and 98842 transitions. [2024-11-09 05:24:10,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:10,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-09 05:24:10,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:10,204 INFO L225 Difference]: With dead ends: 66652 [2024-11-09 05:24:10,204 INFO L226 Difference]: Without dead ends: 44791 [2024-11-09 05:24:10,266 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 05:24:10,268 INFO L432 NwaCegarLoop]: 3263 mSDtfsCounter, 3480 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3480 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:10,269 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3480 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:24:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44791 states. [2024-11-09 05:24:12,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44791 to 44595. [2024-11-09 05:24:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44595 states, 38827 states have (on average 1.4721456718263064) internal successors, (57159), 38958 states have internal predecessors, (57159), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2024-11-09 05:24:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44595 states to 44595 states and 65361 transitions. [2024-11-09 05:24:12,378 INFO L78 Accepts]: Start accepts. Automaton has 44595 states and 65361 transitions. Word has length 159 [2024-11-09 05:24:12,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:12,379 INFO L471 AbstractCegarLoop]: Abstraction has 44595 states and 65361 transitions. [2024-11-09 05:24:12,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:12,379 INFO L276 IsEmpty]: Start isEmpty. Operand 44595 states and 65361 transitions. [2024-11-09 05:24:12,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:24:12,599 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:12,600 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:24:12,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 05:24:12,600 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:12,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:12,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1517102943, now seen corresponding path program 1 times [2024-11-09 05:24:12,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:12,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065412379] [2024-11-09 05:24:12,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:12,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 05:24:12,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:12,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065412379] [2024-11-09 05:24:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065412379] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:12,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:12,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:12,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670587557] [2024-11-09 05:24:12,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:12,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:12,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:12,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:12,718 INFO L87 Difference]: Start difference. First operand 44595 states and 65361 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:16,101 INFO L93 Difference]: Finished difference Result 129340 states and 189658 transitions. [2024-11-09 05:24:16,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-09 05:24:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:16,502 INFO L225 Difference]: With dead ends: 129340 [2024-11-09 05:24:16,502 INFO L226 Difference]: Without dead ends: 86391 [2024-11-09 05:24:16,605 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 05:24:16,606 INFO L432 NwaCegarLoop]: 3263 mSDtfsCounter, 3482 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3460 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:16,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3482 Valid, 3460 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:24:16,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86391 states. [2024-11-09 05:24:20,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86391 to 86003. [2024-11-09 05:24:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86003 states, 74731 states have (on average 1.4517000976836922) internal successors, (108487), 74990 states have internal predecessors, (108487), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2024-11-09 05:24:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86003 states to 86003 states and 124369 transitions. [2024-11-09 05:24:20,604 INFO L78 Accepts]: Start accepts. Automaton has 86003 states and 124369 transitions. Word has length 159 [2024-11-09 05:24:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:20,605 INFO L471 AbstractCegarLoop]: Abstraction has 86003 states and 124369 transitions. [2024-11-09 05:24:20,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 86003 states and 124369 transitions. [2024-11-09 05:24:21,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-09 05:24:21,227 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:21,228 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:24:21,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 05:24:21,228 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:21,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash -281524714, now seen corresponding path program 1 times [2024-11-09 05:24:21,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:21,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672524628] [2024-11-09 05:24:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:21,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2024-11-09 05:24:21,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672524628] [2024-11-09 05:24:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672524628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:21,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:21,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862998371] [2024-11-09 05:24:21,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:21,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:21,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:21,338 INFO L87 Difference]: Start difference. First operand 86003 states and 124369 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:26,584 INFO L93 Difference]: Finished difference Result 252412 states and 366554 transitions. [2024-11-09 05:24:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:26,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 159 [2024-11-09 05:24:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:27,437 INFO L225 Difference]: With dead ends: 252412 [2024-11-09 05:24:27,438 INFO L226 Difference]: Without dead ends: 168055 [2024-11-09 05:24:27,716 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 05:24:27,717 INFO L432 NwaCegarLoop]: 3288 mSDtfsCounter, 3485 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3485 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:27,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3485 Valid, 3485 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:24:27,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168055 states. [2024-11-09 05:24:33,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168055 to 167283. [2024-11-09 05:24:33,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167283 states, 145259 states have (on average 1.4359385649081984) internal successors, (208583), 145774 states have internal predecessors, (208583), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2024-11-09 05:24:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167283 states to 167283 states and 239313 transitions. [2024-11-09 05:24:33,991 INFO L78 Accepts]: Start accepts. Automaton has 167283 states and 239313 transitions. Word has length 159 [2024-11-09 05:24:33,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:33,991 INFO L471 AbstractCegarLoop]: Abstraction has 167283 states and 239313 transitions. [2024-11-09 05:24:33,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:24:33,992 INFO L276 IsEmpty]: Start isEmpty. Operand 167283 states and 239313 transitions. [2024-11-09 05:24:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-11-09 05:24:34,991 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:34,991 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:24:34,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 05:24:34,992 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:34,992 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:34,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1014505049, now seen corresponding path program 1 times [2024-11-09 05:24:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:34,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921176591] [2024-11-09 05:24:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:35,527 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-09 05:24:35,527 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:35,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921176591] [2024-11-09 05:24:35,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921176591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:24:35,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863037144] [2024-11-09 05:24:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:35,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:24:35,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:24:35,530 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:24:35,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5463b947-7653-441c-8608-4b1b3d554ae0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:24:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:35,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:24:35,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:24:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-09 05:24:35,866 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:24:35,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863037144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:35,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:24:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:24:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101305044] [2024-11-09 05:24:35,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:35,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:35,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:35,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:24:35,870 INFO L87 Difference]: Start difference. First operand 167283 states and 239313 transitions. Second operand has 3 states, 3 states have (on average 44.333333333333336) internal successors, (133), 3 states have internal predecessors, (133), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)