./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/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 fde4aa10540dafc8826e147080809d5acc35a439830c8d5d4d25a271d8a78822 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:03:55,568 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:03:55,679 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:03:55,687 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:03:55,688 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:03:55,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:03:55,734 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:03:55,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:03:55,737 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:03:55,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:03:55,739 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:03:55,739 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:03:55,740 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:03:55,740 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:03:55,743 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:03:55,743 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:03:55,744 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:03:55,744 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:03:55,744 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:03:55,745 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:03:55,745 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:03:55,750 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:03:55,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:03:55,751 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:03:55,751 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:03:55,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:03:55,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:03:55,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:03:55,753 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:03:55,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:03:55,754 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:03:55,756 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:03:55,756 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:03:55,757 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:03:55,757 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:03:55,757 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:03:55,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:03:55,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:03:55,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:03:55,760 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:03:55,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:03:55,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:03:55,761 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:03:55,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:03:55,762 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:03:55,763 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:03:55,763 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:03:55,763 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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fde4aa10540dafc8826e147080809d5acc35a439830c8d5d4d25a271d8a78822 [2024-11-09 06:03:56,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:03:56,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:03:56,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:03:56,167 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:03:56,167 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:03:56,169 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c Unable to find full path for "g++" [2024-11-09 06:03:58,579 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:03:59,426 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:03:59,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c [2024-11-09 06:03:59,496 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/data/0f524f0c4/3f415c76fbae459bba3bf73275b7bfd9/FLAG7d71446eb [2024-11-09 06:03:59,524 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/data/0f524f0c4/3f415c76fbae459bba3bf73275b7bfd9 [2024-11-09 06:03:59,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:03:59,529 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:03:59,534 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:03:59,535 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:03:59,542 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:03:59,543 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:59" (1/1) ... [2024-11-09 06:03:59,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18eb699c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:03:59, skipping insertion in model container [2024-11-09 06:03:59,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:03:59" (1/1) ... [2024-11-09 06:03:59,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:04:02,782 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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[382357,382370] [2024-11-09 06:04:02,826 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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[383339,383352] [2024-11-09 06:04:03,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:04:03,295 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:04:04,865 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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[382357,382370] [2024-11-09 06:04:04,872 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_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-2.c[383339,383352] [2024-11-09 06:04:04,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:04:05,065 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:04:05,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05 WrapperNode [2024-11-09 06:04:05,067 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:04:05,068 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:04:05,069 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:04:05,069 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:04:05,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:05,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:05,797 INFO L138 Inliner]: procedures = 60, calls = 66, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 12987 [2024-11-09 06:04:05,798 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:04:05,799 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:04:05,799 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:04:05,799 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:04:05,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:05,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:05,971 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:05,971 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,571 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:04:06,572 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:04:06,577 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:04:06,577 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:04:06,578 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (1/1) ... [2024-11-09 06:04:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:04:06,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:06,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:04:06,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:04:06,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:04:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 06:04:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 06:04:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 06:04:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 06:04:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 06:04:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 06:04:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure error [2024-11-09 06:04:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2024-11-09 06:04:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 06:04:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 06:04:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 06:04:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 06:04:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 06:04:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 06:04:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:04:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:04:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:04:07,103 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:04:07,106 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:04:20,142 INFO L? ?]: Removed 1735 outVars from TransFormulas that were not future-live. [2024-11-09 06:04:20,142 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:04:23,685 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:04:23,686 INFO L316 CfgBuilder]: Removed 12 assume(true) statements. [2024-11-09 06:04:23,686 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:04:23 BoogieIcfgContainer [2024-11-09 06:04:23,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:04:23,690 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:04:23,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:04:23,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:04:23,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:03:59" (1/3) ... [2024-11-09 06:04:23,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be23068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:04:23, skipping insertion in model container [2024-11-09 06:04:23,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:04:05" (2/3) ... [2024-11-09 06:04:23,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be23068 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:04:23, skipping insertion in model container [2024-11-09 06:04:23,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:04:23" (3/3) ... [2024-11-09 06:04:23,700 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.08.cil-2.c [2024-11-09 06:04:23,725 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:04:23,726 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 06:04:23,908 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:04:23,917 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;@711d9b77, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:04:23,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 06:04:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-09 06:04:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-09 06:04:23,949 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:23,952 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] [2024-11-09 06:04:23,953 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:23,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash 426814952, now seen corresponding path program 1 times [2024-11-09 06:04:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:23,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113473534] [2024-11-09 06:04:23,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:23,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:04:24,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:24,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113473534] [2024-11-09 06:04:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113473534] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:24,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:04:24,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304985225] [2024-11-09 06:04:24,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:24,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:04:24,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:24,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:04:24,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:04:24,873 INFO L87 Difference]: Start difference. First operand has 1802 states, 1768 states have (on average 1.9592760180995474) internal successors, (3464), 1773 states have internal predecessors, (3464), 24 states have call successors, (24), 7 states have call predecessors, (24), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 06:04:26,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:26,428 INFO L93 Difference]: Finished difference Result 3739 states and 7250 transitions. [2024-11-09 06:04:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:04:26,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 56 [2024-11-09 06:04:26,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:26,465 INFO L225 Difference]: With dead ends: 3739 [2024-11-09 06:04:26,465 INFO L226 Difference]: Without dead ends: 1936 [2024-11-09 06:04:26,478 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 06:04:26,483 INFO L432 NwaCegarLoop]: 3416 mSDtfsCounter, 3673 mSDsluCounter, 3332 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3673 SdHoareTripleChecker+Valid, 6748 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:26,485 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3673 Valid, 6748 Invalid, 680 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-09 06:04:26,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2024-11-09 06:04:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1935. [2024-11-09 06:04:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1935 states, 1879 states have (on average 1.9244278871740288) internal successors, (3616), 1883 states have internal predecessors, (3616), 42 states have call successors, (42), 13 states have call predecessors, (42), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 06:04:26,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1935 states to 1935 states and 3698 transitions. [2024-11-09 06:04:26,715 INFO L78 Accepts]: Start accepts. Automaton has 1935 states and 3698 transitions. Word has length 56 [2024-11-09 06:04:26,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:26,718 INFO L471 AbstractCegarLoop]: Abstraction has 1935 states and 3698 transitions. [2024-11-09 06:04:26,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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 06:04:26,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1935 states and 3698 transitions. [2024-11-09 06:04:26,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:04:26,734 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:26,735 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:26,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:04:26,735 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:26,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1612938359, now seen corresponding path program 1 times [2024-11-09 06:04:26,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:26,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964695569] [2024-11-09 06:04:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:26,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:04:27,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:27,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964695569] [2024-11-09 06:04:27,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964695569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:27,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976403791] [2024-11-09 06:04:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:27,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:27,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:27,174 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:27,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:04:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:27,521 INFO L255 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:04:27,535 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-09 06:04:27,648 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:27,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976403791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:27,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:27,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:04:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098557721] [2024-11-09 06:04:27,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:27,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:27,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:27,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:27,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:04:27,654 INFO L87 Difference]: Start difference. First operand 1935 states and 3698 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 06:04:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:28,467 INFO L93 Difference]: Finished difference Result 2506 states and 4553 transitions. [2024-11-09 06:04:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 110 [2024-11-09 06:04:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:28,492 INFO L225 Difference]: With dead ends: 2506 [2024-11-09 06:04:28,492 INFO L226 Difference]: Without dead ends: 2217 [2024-11-09 06:04:28,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 06:04:28,499 INFO L432 NwaCegarLoop]: 3297 mSDtfsCounter, 3470 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3470 SdHoareTripleChecker+Valid, 3478 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:28,500 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3470 Valid, 3478 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:04:28,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2217 states. [2024-11-09 06:04:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2217 to 2211. [2024-11-09 06:04:28,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2211 states, 2109 states have (on average 1.8724513987671882) internal successors, (3949), 2114 states have internal predecessors, (3949), 76 states have call successors, (76), 25 states have call predecessors, (76), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-09 06:04:28,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2211 states to 2211 states and 4099 transitions. [2024-11-09 06:04:28,646 INFO L78 Accepts]: Start accepts. Automaton has 2211 states and 4099 transitions. Word has length 110 [2024-11-09 06:04:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:28,647 INFO L471 AbstractCegarLoop]: Abstraction has 2211 states and 4099 transitions. [2024-11-09 06:04:28,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 06:04:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2211 states and 4099 transitions. [2024-11-09 06:04:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:04:28,654 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:28,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:28,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:04:28,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:28,860 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:28,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:28,861 INFO L85 PathProgramCache]: Analyzing trace with hash 702013975, now seen corresponding path program 1 times [2024-11-09 06:04:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:28,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866932447] [2024-11-09 06:04:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:04:29,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866932447] [2024-11-09 06:04:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866932447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:29,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902913511] [2024-11-09 06:04:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:29,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:29,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:29,163 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:29,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:04:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:29,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:04:29,477 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 06:04:29,587 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902913511] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:04:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454963440] [2024-11-09 06:04:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:29,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:29,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:29,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:04:29,595 INFO L87 Difference]: Start difference. First operand 2211 states and 4099 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 06:04:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:30,455 INFO L93 Difference]: Finished difference Result 3328 states and 5766 transitions. [2024-11-09 06:04:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 110 [2024-11-09 06:04:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:30,476 INFO L225 Difference]: With dead ends: 3328 [2024-11-09 06:04:30,477 INFO L226 Difference]: Without dead ends: 2763 [2024-11-09 06:04:30,482 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 06:04:30,483 INFO L432 NwaCegarLoop]: 3263 mSDtfsCounter, 3464 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 3444 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:30,484 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 3444 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:04:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2024-11-09 06:04:30,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2755. [2024-11-09 06:04:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2563 states have (on average 1.795942255169723) internal successors, (4603), 2570 states have internal predecessors, (4603), 142 states have call successors, (142), 49 states have call predecessors, (142), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2024-11-09 06:04:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 4885 transitions. [2024-11-09 06:04:30,667 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 4885 transitions. Word has length 110 [2024-11-09 06:04:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:30,670 INFO L471 AbstractCegarLoop]: Abstraction has 2755 states and 4885 transitions. [2024-11-09 06:04:30,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 06:04:30,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 4885 transitions. [2024-11-09 06:04:30,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:04:30,684 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:30,688 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:30,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:04:30,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:30,889 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:30,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:30,890 INFO L85 PathProgramCache]: Analyzing trace with hash -709820489, now seen corresponding path program 1 times [2024-11-09 06:04:30,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:30,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518592744] [2024-11-09 06:04:30,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:30,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:04:31,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:31,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518592744] [2024-11-09 06:04:31,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518592744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:31,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946125239] [2024-11-09 06:04:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:31,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:31,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:31,164 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:31,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:04:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:31,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:04:31,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 06:04:31,484 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:31,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946125239] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:31,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:04:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108175715] [2024-11-09 06:04:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:31,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:31,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:31,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:04:31,489 INFO L87 Difference]: Start difference. First operand 2755 states and 4885 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 06:04:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:32,323 INFO L93 Difference]: Finished difference Result 4948 states and 8142 transitions. [2024-11-09 06:04:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 110 [2024-11-09 06:04:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:32,350 INFO L225 Difference]: With dead ends: 4948 [2024-11-09 06:04:32,350 INFO L226 Difference]: Without dead ends: 3839 [2024-11-09 06:04:32,358 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 06:04:32,359 INFO L432 NwaCegarLoop]: 3293 mSDtfsCounter, 3473 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3474 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 06:04:32,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3473 Valid, 3474 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2024-11-09 06:04:32,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 3827. [2024-11-09 06:04:32,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3459 states have (on average 1.7019369760046257) internal successors, (5887), 3470 states have internal predecessors, (5887), 270 states have call successors, (270), 97 states have call predecessors, (270), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2024-11-09 06:04:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 6425 transitions. [2024-11-09 06:04:32,819 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 6425 transitions. Word has length 110 [2024-11-09 06:04:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:32,820 INFO L471 AbstractCegarLoop]: Abstraction has 3827 states and 6425 transitions. [2024-11-09 06:04:32,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 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 06:04:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 6425 transitions. [2024-11-09 06:04:32,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:04:32,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:32,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:32,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 06:04:33,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:33,033 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:33,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1840199191, now seen corresponding path program 1 times [2024-11-09 06:04:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:33,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553374363] [2024-11-09 06:04:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:04:33,235 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:33,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553374363] [2024-11-09 06:04:33,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553374363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:33,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977389855] [2024-11-09 06:04:33,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:33,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:33,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:33,241 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:33,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:04:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:33,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:04:33,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:04:33,588 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977389855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:04:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499721773] [2024-11-09 06:04:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:33,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:33,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:33,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:04:33,592 INFO L87 Difference]: Start difference. First operand 3827 states and 6425 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 06:04:34,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:34,394 INFO L93 Difference]: Finished difference Result 8140 states and 12794 transitions. [2024-11-09 06:04:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 110 [2024-11-09 06:04:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:34,431 INFO L225 Difference]: With dead ends: 8140 [2024-11-09 06:04:34,431 INFO L226 Difference]: Without dead ends: 5959 [2024-11-09 06:04:34,444 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 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 06:04:34,446 INFO L432 NwaCegarLoop]: 3245 mSDtfsCounter, 3458 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3426 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:34,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3426 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5959 states. [2024-11-09 06:04:34,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5959 to 5939. [2024-11-09 06:04:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5227 states have (on average 1.6083795676296155) internal successors, (8407), 5246 states have internal predecessors, (8407), 518 states have call successors, (518), 193 states have call predecessors, (518), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2024-11-09 06:04:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 9441 transitions. [2024-11-09 06:04:34,733 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 9441 transitions. Word has length 110 [2024-11-09 06:04:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:34,734 INFO L471 AbstractCegarLoop]: Abstraction has 5939 states and 9441 transitions. [2024-11-09 06:04:34,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 06:04:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 9441 transitions. [2024-11-09 06:04:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-09 06:04:34,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:34,745 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:34,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:04:34,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:34,946 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:34,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1013511241, now seen corresponding path program 1 times [2024-11-09 06:04:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:34,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909794678] [2024-11-09 06:04:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:34,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:04:35,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:35,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909794678] [2024-11-09 06:04:35,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909794678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:35,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:35,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:35,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955355261] [2024-11-09 06:04:35,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:35,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:35,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:35,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:35,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:35,119 INFO L87 Difference]: Start difference. First operand 5939 states and 9441 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 06:04:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:36,060 INFO L93 Difference]: Finished difference Result 9351 states and 14484 transitions. [2024-11-09 06:04:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:36,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 110 [2024-11-09 06:04:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:36,111 INFO L225 Difference]: With dead ends: 9351 [2024-11-09 06:04:36,111 INFO L226 Difference]: Without dead ends: 7139 [2024-11-09 06:04:36,122 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 06:04:36,123 INFO L432 NwaCegarLoop]: 3349 mSDtfsCounter, 99 mSDsluCounter, 3254 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6603 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:36,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 6603 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:04:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7139 states. [2024-11-09 06:04:36,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7139 to 6803. [2024-11-09 06:04:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6803 states, 6059 states have (on average 1.606700775705562) internal successors, (9735), 6078 states have internal predecessors, (9735), 534 states have call successors, (534), 209 states have call predecessors, (534), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2024-11-09 06:04:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6803 states to 6803 states and 10801 transitions. [2024-11-09 06:04:36,485 INFO L78 Accepts]: Start accepts. Automaton has 6803 states and 10801 transitions. Word has length 110 [2024-11-09 06:04:36,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:36,486 INFO L471 AbstractCegarLoop]: Abstraction has 6803 states and 10801 transitions. [2024-11-09 06:04:36,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 06:04:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 6803 states and 10801 transitions. [2024-11-09 06:04:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 06:04:36,505 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:36,505 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, 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] [2024-11-09 06:04:36,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:04:36,506 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:36,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 132683432, now seen corresponding path program 1 times [2024-11-09 06:04:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064089498] [2024-11-09 06:04:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:04:36,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:36,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064089498] [2024-11-09 06:04:36,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064089498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:36,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:36,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:36,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361908535] [2024-11-09 06:04:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:36,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:36,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:36,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:36,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:36,662 INFO L87 Difference]: Start difference. First operand 6803 states and 10801 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:37,843 INFO L93 Difference]: Finished difference Result 16972 states and 25882 transitions. [2024-11-09 06:04:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 149 [2024-11-09 06:04:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:37,926 INFO L225 Difference]: With dead ends: 16972 [2024-11-09 06:04:37,926 INFO L226 Difference]: Without dead ends: 11815 [2024-11-09 06:04:37,943 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 06:04:37,945 INFO L432 NwaCegarLoop]: 3247 mSDtfsCounter, 3459 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3459 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:37,945 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3459 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11815 states. [2024-11-09 06:04:38,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 11763. [2024-11-09 06:04:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11763 states, 10315 states have (on average 1.5394086282113426) internal successors, (15879), 10350 states have internal predecessors, (15879), 1030 states have call successors, (1030), 417 states have call predecessors, (1030), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2024-11-09 06:04:38,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11763 states to 11763 states and 17937 transitions. [2024-11-09 06:04:38,725 INFO L78 Accepts]: Start accepts. Automaton has 11763 states and 17937 transitions. Word has length 149 [2024-11-09 06:04:38,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:38,726 INFO L471 AbstractCegarLoop]: Abstraction has 11763 states and 17937 transitions. [2024-11-09 06:04:38,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11763 states and 17937 transitions. [2024-11-09 06:04:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 06:04:38,760 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:38,760 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, 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] [2024-11-09 06:04:38,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:04:38,760 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:38,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:38,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1289396014, now seen corresponding path program 1 times [2024-11-09 06:04:38,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:38,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800986393] [2024-11-09 06:04:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:38,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:04:38,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:38,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800986393] [2024-11-09 06:04:38,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800986393] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:38,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:38,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:38,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301851377] [2024-11-09 06:04:38,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:38,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:38,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:38,925 INFO L87 Difference]: Start difference. First operand 11763 states and 17937 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:40,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:40,493 INFO L93 Difference]: Finished difference Result 31708 states and 47290 transitions. [2024-11-09 06:04:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 149 [2024-11-09 06:04:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:40,622 INFO L225 Difference]: With dead ends: 31708 [2024-11-09 06:04:40,622 INFO L226 Difference]: Without dead ends: 21591 [2024-11-09 06:04:40,666 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 06:04:40,667 INFO L432 NwaCegarLoop]: 3247 mSDtfsCounter, 3461 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:40,668 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3461 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21591 states. [2024-11-09 06:04:41,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21591 to 21491. [2024-11-09 06:04:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21491 states, 18667 states have (on average 1.4917769325547758) internal successors, (27847), 18734 states have internal predecessors, (27847), 1990 states have call successors, (1990), 833 states have call predecessors, (1990), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2024-11-09 06:04:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21491 states to 21491 states and 31825 transitions. [2024-11-09 06:04:42,117 INFO L78 Accepts]: Start accepts. Automaton has 21491 states and 31825 transitions. Word has length 149 [2024-11-09 06:04:42,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:42,118 INFO L471 AbstractCegarLoop]: Abstraction has 21491 states and 31825 transitions. [2024-11-09 06:04:42,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 21491 states and 31825 transitions. [2024-11-09 06:04:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 06:04:42,173 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:42,174 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, 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] [2024-11-09 06:04:42,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:04:42,174 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:42,175 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:42,175 INFO L85 PathProgramCache]: Analyzing trace with hash -460904506, now seen corresponding path program 1 times [2024-11-09 06:04:42,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:42,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631687671] [2024-11-09 06:04:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:42,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:04:42,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:42,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631687671] [2024-11-09 06:04:42,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631687671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:42,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:42,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:42,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169783786] [2024-11-09 06:04:42,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:42,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:42,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:42,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:42,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:42,335 INFO L87 Difference]: Start difference. First operand 21491 states and 31825 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:44,501 INFO L93 Difference]: Finished difference Result 60604 states and 88922 transitions. [2024-11-09 06:04:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 149 [2024-11-09 06:04:44,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:44,707 INFO L225 Difference]: With dead ends: 60604 [2024-11-09 06:04:44,708 INFO L226 Difference]: Without dead ends: 40759 [2024-11-09 06:04:44,777 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 06:04:44,778 INFO L432 NwaCegarLoop]: 3247 mSDtfsCounter, 3463 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3463 SdHoareTripleChecker+Valid, 3428 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:44,779 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3463 Valid, 3428 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40759 states. [2024-11-09 06:04:46,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40759 to 40563. [2024-11-09 06:04:46,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40563 states, 35051 states have (on average 1.4591024507146728) internal successors, (51143), 35182 states have internal predecessors, (51143), 3846 states have call successors, (3846), 1665 states have call predecessors, (3846), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2024-11-09 06:04:47,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40563 states to 40563 states and 58833 transitions. [2024-11-09 06:04:47,069 INFO L78 Accepts]: Start accepts. Automaton has 40563 states and 58833 transitions. Word has length 149 [2024-11-09 06:04:47,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:47,070 INFO L471 AbstractCegarLoop]: Abstraction has 40563 states and 58833 transitions. [2024-11-09 06:04:47,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:47,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40563 states and 58833 transitions. [2024-11-09 06:04:47,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 06:04:47,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:47,161 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, 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] [2024-11-09 06:04:47,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 06:04:47,162 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:47,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:47,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1140757815, now seen corresponding path program 1 times [2024-11-09 06:04:47,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:47,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993039550] [2024-11-09 06:04:47,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:47,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-09 06:04:47,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:47,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993039550] [2024-11-09 06:04:47,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993039550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:47,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:47,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:47,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073915344] [2024-11-09 06:04:47,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:47,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:47,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:47,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:47,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:47,292 INFO L87 Difference]: Start difference. First operand 40563 states and 58833 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:50,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:50,985 INFO L93 Difference]: Finished difference Result 117244 states and 169818 transitions. [2024-11-09 06:04:50,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:50,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 149 [2024-11-09 06:04:50,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:51,515 INFO L225 Difference]: With dead ends: 117244 [2024-11-09 06:04:51,516 INFO L226 Difference]: Without dead ends: 78327 [2024-11-09 06:04:51,626 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 06:04:51,627 INFO L432 NwaCegarLoop]: 3262 mSDtfsCounter, 3466 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3466 SdHoareTripleChecker+Valid, 3443 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:51,628 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3466 Valid, 3443 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 06:04:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78327 states. [2024-11-09 06:04:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78327 to 77939. [2024-11-09 06:04:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77939 states, 67179 states have (on average 1.4357909465755667) internal successors, (96455), 67438 states have internal predecessors, (96455), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2024-11-09 06:04:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77939 states to 77939 states and 111313 transitions. [2024-11-09 06:04:55,167 INFO L78 Accepts]: Start accepts. Automaton has 77939 states and 111313 transitions. Word has length 149 [2024-11-09 06:04:55,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:55,169 INFO L471 AbstractCegarLoop]: Abstraction has 77939 states and 111313 transitions. [2024-11-09 06:04:55,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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 06:04:55,170 INFO L276 IsEmpty]: Start isEmpty. Operand 77939 states and 111313 transitions. [2024-11-09 06:04:55,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 06:04:55,391 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:55,391 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, 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] [2024-11-09 06:04:55,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 06:04:55,392 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:55,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1740861320, now seen corresponding path program 1 times [2024-11-09 06:04:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897109390] [2024-11-09 06:04:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:04:55,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:55,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897109390] [2024-11-09 06:04:55,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897109390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:55,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140529267] [2024-11-09 06:04:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:55,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:55,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:55,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:04:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:56,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 865 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:04:56,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 06:04:56,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140529267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:56,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:56,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:04:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507426615] [2024-11-09 06:04:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:56,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:04:56,182 INFO L87 Difference]: Start difference. First operand 77939 states and 111313 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2024-11-09 06:05:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:00,634 INFO L93 Difference]: Finished difference Result 117115 states and 169303 transitions. [2024-11-09 06:05:00,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:00,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) Word has length 172 [2024-11-09 06:05:00,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:05:01,038 INFO L225 Difference]: With dead ends: 117115 [2024-11-09 06:05:01,039 INFO L226 Difference]: Without dead ends: 78199 [2024-11-09 06:05:01,145 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:05:01,146 INFO L432 NwaCegarLoop]: 3410 mSDtfsCounter, 178 mSDsluCounter, 3239 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 6649 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:05:01,146 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 6649 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 06:05:01,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78199 states. [2024-11-09 06:05:05,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78199 to 77683. [2024-11-09 06:05:05,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77683 states, 66923 states have (on average 1.4221568070767898) internal successors, (95175), 67182 states have internal predecessors, (95175), 7430 states have call successors, (7430), 3329 states have call predecessors, (7430), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2024-11-09 06:05:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77683 states to 77683 states and 110033 transitions. [2024-11-09 06:05:05,560 INFO L78 Accepts]: Start accepts. Automaton has 77683 states and 110033 transitions. Word has length 172 [2024-11-09 06:05:05,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:05:05,561 INFO L471 AbstractCegarLoop]: Abstraction has 77683 states and 110033 transitions. [2024-11-09 06:05:05,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 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) [2024-11-09 06:05:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 77683 states and 110033 transitions. [2024-11-09 06:05:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-09 06:05:05,785 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:05:05,785 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, 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 06:05:05,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:05:05,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:05,990 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:05:05,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:05:05,991 INFO L85 PathProgramCache]: Analyzing trace with hash -277740056, now seen corresponding path program 1 times [2024-11-09 06:05:05,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:05:05,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655363223] [2024-11-09 06:05:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:05,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:05:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-09 06:05:06,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:05:06,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655363223] [2024-11-09 06:05:06,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655363223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:05:06,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854222688] [2024-11-09 06:05:06,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:05:06,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:05:06,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:05:06,408 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:05:06,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d3e03d6-a28e-444e-9f4f-0e669b9e455e/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:05:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:05:06,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:05:06,714 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:05:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:05:06,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:05:06,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854222688] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:05:06,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:05:06,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 06:05:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055579652] [2024-11-09 06:05:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:05:06,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:05:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:05:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 06:05:06,778 INFO L87 Difference]: Start difference. First operand 77683 states and 110033 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 06:05:10,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:05:10,302 INFO L93 Difference]: Finished difference Result 116731 states and 167383 transitions. [2024-11-09 06:05:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:05:10,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 172 [2024-11-09 06:05:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted.