./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E --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 0385e1d16d423c194d4048fc3b294994e5a7e416b8435d95ed6181aeb075af1b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:13:23,835 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:13:23,939 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:13:23,945 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:13:23,945 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:13:23,992 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:13:23,992 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:13:23,993 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:13:23,993 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:13:23,993 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:13:23,993 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:13:23,993 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:13:23,994 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:13:23,995 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:13:23,995 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:13:23,995 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:13:23,995 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:13:23,996 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:13:23,996 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:13:23,996 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:13:23,996 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:13:23,996 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:13:23,996 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:13:23,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:13:23,998 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:13:23,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:13:23,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:13:23,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:13:23,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:13:23,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:13:23,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:13:23,999 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:13:23,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:13:24,000 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:13:24,000 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:13:24,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:13:24,000 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E 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 -> 0385e1d16d423c194d4048fc3b294994e5a7e416b8435d95ed6181aeb075af1b [2024-11-14 05:13:24,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:13:24,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:13:24,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:13:24,334 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:13:24,335 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:13:24,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c Unable to find full path for "g++" [2024-11-14 05:13:26,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:13:27,221 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:13:27,222 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c [2024-11-14 05:13:27,281 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/data/3fb3c8980/451f885353bf41b0b228d9a229d9f762/FLAG93676dae1 [2024-11-14 05:13:27,304 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/data/3fb3c8980/451f885353bf41b0b228d9a229d9f762 [2024-11-14 05:13:27,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:13:27,308 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:13:27,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:13:27,310 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:13:27,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:13:27,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:13:27" (1/1) ... [2024-11-14 05:13:27,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9161da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:27, skipping insertion in model container [2024-11-14 05:13:27,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:13:27" (1/1) ... [2024-11-14 05:13:27,542 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:13:29,757 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_dec33d36-40bf-47e9-ba4f-9e8977a56629/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[382357,382370] [2024-11-14 05:13:29,805 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_dec33d36-40bf-47e9-ba4f-9e8977a56629/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[383339,383352] [2024-11-14 05:13:30,176 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:13:30,190 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:13:31,530 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_dec33d36-40bf-47e9-ba4f-9e8977a56629/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[382357,382370] [2024-11-14 05:13:31,534 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_dec33d36-40bf-47e9-ba4f-9e8977a56629/sv-benchmarks/c/combinations/Problem05_label46+token_ring.08.cil-1.c[383339,383352] [2024-11-14 05:13:31,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:13:31,645 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:13:31,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31 WrapperNode [2024-11-14 05:13:31,646 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:13:31,647 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:13:31,647 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:13:31,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:13:31,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:31,750 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,364 INFO L138 Inliner]: procedures = 60, calls = 65, calls flagged for inlining = 38, calls inlined = 38, statements flattened = 12981 [2024-11-14 05:13:32,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:13:32,365 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:13:32,365 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:13:32,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:13:32,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,455 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,455 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,816 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,896 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:32,969 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:33,022 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:13:33,023 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:13:33,023 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:13:33,024 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:13:33,025 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (1/1) ... [2024-11-14 05:13:33,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:13:33,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:33,060 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:13:33,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:13:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:13:33,098 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-14 05:13:33,098 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-14 05:13:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 05:13:33,099 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 05:13:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-14 05:13:33,099 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-14 05:13:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-14 05:13:33,099 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-14 05:13:33,099 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-14 05:13:33,100 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-14 05:13:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-14 05:13:33,100 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-14 05:13:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:13:33,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:13:33,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:13:33,295 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:13:33,297 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:13:45,541 INFO L? ?]: Removed 1731 outVars from TransFormulas that were not future-live. [2024-11-14 05:13:45,542 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:13:48,298 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:13:48,299 INFO L316 CfgBuilder]: Removed 12 assume(true) statements. [2024-11-14 05:13:48,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:13:48 BoogieIcfgContainer [2024-11-14 05:13:48,300 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:13:48,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:13:48,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:13:48,307 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:13:48,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:13:27" (1/3) ... [2024-11-14 05:13:48,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c99379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:13:48, skipping insertion in model container [2024-11-14 05:13:48,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:13:31" (2/3) ... [2024-11-14 05:13:48,308 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c99379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:13:48, skipping insertion in model container [2024-11-14 05:13:48,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:13:48" (3/3) ... [2024-11-14 05:13:48,310 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.08.cil-1.c [2024-11-14 05:13:48,328 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:13:48,331 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG Problem05_label46+token_ring.08.cil-1.c that has 7 procedures, 1796 locations, 1 initial locations, 12 loop locations, and 2 error locations. [2024-11-14 05:13:48,465 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:13:48,482 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;@5a2ac9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:13:48,483 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 05:13:48,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 1796 states, 1765 states have (on average 1.9592067988668556) internal successors, (3458), 1768 states have internal predecessors, (3458), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-14 05:13:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 05:13:48,509 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:48,509 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] [2024-11-14 05:13:48,510 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:48,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1263960526, now seen corresponding path program 1 times [2024-11-14 05:13:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711764067] [2024-11-14 05:13:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:48,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:49,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711764067] [2024-11-14 05:13:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711764067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:49,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:49,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 05:13:49,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124669287] [2024-11-14 05:13:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:49,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:13:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:13:49,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:13:49,305 INFO L87 Difference]: Start difference. First operand has 1796 states, 1765 states have (on average 1.9592067988668556) internal successors, (3458), 1768 states have internal predecessors, (3458), 22 states have call successors, (22), 6 states have call predecessors, (22), 6 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:13:50,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:50,542 INFO L93 Difference]: Finished difference Result 3728 states and 7230 transitions. [2024-11-14 05:13:50,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:13:50,545 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2024-11-14 05:13:50,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:50,583 INFO L225 Difference]: With dead ends: 3728 [2024-11-14 05:13:50,583 INFO L226 Difference]: Without dead ends: 1931 [2024-11-14 05:13:50,599 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 [2024-11-14 05:13:50,602 INFO L432 NwaCegarLoop]: 3409 mSDtfsCounter, 3665 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3665 SdHoareTripleChecker+Valid, 6736 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:50,603 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3665 Valid, 6736 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:13:50,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1931 states. [2024-11-14 05:13:50,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1931 to 1930. [2024-11-14 05:13:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1876 states have (on average 1.9243070362473347) internal successors, (3610), 1879 states have internal predecessors, (3610), 40 states have call successors, (40), 12 states have call predecessors, (40), 12 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-14 05:13:50,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3690 transitions. [2024-11-14 05:13:50,839 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3690 transitions. Word has length 55 [2024-11-14 05:13:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:50,840 INFO L471 AbstractCegarLoop]: Abstraction has 1930 states and 3690 transitions. [2024-11-14 05:13:50,840 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 05:13:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3690 transitions. [2024-11-14 05:13:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:13:50,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:50,849 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] [2024-11-14 05:13:50,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:13:50,850 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:50,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:50,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1977724957, now seen corresponding path program 1 times [2024-11-14 05:13:50,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:50,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357193172] [2024-11-14 05:13:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:50,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:13:51,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:51,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357193172] [2024-11-14 05:13:51,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357193172] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:51,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140693788] [2024-11-14 05:13:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:51,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:51,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:51,207 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:51,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:13:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:51,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:13:51,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:13:51,496 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:13:51,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140693788] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:51,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:13:51,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:13:51,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831337578] [2024-11-14 05:13:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:51,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:51,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:51,498 INFO L87 Difference]: Start difference. First operand 1930 states and 3690 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:52,098 INFO L93 Difference]: Finished difference Result 2491 states and 4529 transitions. [2024-11-14 05:13:52,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:52,099 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2024-11-14 05:13:52,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:52,115 INFO L225 Difference]: With dead ends: 2491 [2024-11-14 05:13:52,115 INFO L226 Difference]: Without dead ends: 2207 [2024-11-14 05:13:52,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:52,119 INFO L432 NwaCegarLoop]: 3283 mSDtfsCounter, 3462 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3462 SdHoareTripleChecker+Valid, 3457 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:52,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3462 Valid, 3457 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:13:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2024-11-14 05:13:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2203. [2024-11-14 05:13:52,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2203 states, 2103 states have (on average 1.8720874940561103) internal successors, (3937), 2107 states have internal predecessors, (3937), 74 states have call successors, (74), 24 states have call predecessors, (74), 24 states have return successors, (74), 72 states have call predecessors, (74), 74 states have call successors, (74) [2024-11-14 05:13:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2203 states to 2203 states and 4085 transitions. [2024-11-14 05:13:52,247 INFO L78 Accepts]: Start accepts. Automaton has 2203 states and 4085 transitions. Word has length 109 [2024-11-14 05:13:52,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:52,248 INFO L471 AbstractCegarLoop]: Abstraction has 2203 states and 4085 transitions. [2024-11-14 05:13:52,248 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:52,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2203 states and 4085 transitions. [2024-11-14 05:13:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:13:52,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:52,254 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] [2024-11-14 05:13:52,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:13:52,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:52,455 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:52,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash -684059011, now seen corresponding path program 1 times [2024-11-14 05:13:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650396441] [2024-11-14 05:13:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:13:52,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650396441] [2024-11-14 05:13:52,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650396441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:52,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986289489] [2024-11-14 05:13:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:52,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:52,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:52,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:52,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:13:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:53,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 674 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:13:53,008 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:13:53,139 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:13:53,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986289489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:53,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:13:53,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:13:53,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230200668] [2024-11-14 05:13:53,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:53,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:53,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:53,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:53,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:53,141 INFO L87 Difference]: Start difference. First operand 2203 states and 4085 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:53,797 INFO L93 Difference]: Finished difference Result 3304 states and 5724 transitions. [2024-11-14 05:13:53,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:53,798 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2024-11-14 05:13:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:53,812 INFO L225 Difference]: With dead ends: 3304 [2024-11-14 05:13:53,812 INFO L226 Difference]: Without dead ends: 2747 [2024-11-14 05:13:53,815 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:53,816 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3456 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3456 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:53,817 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3456 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:13:53,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2747 states. [2024-11-14 05:13:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2747 to 2741. [2024-11-14 05:13:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2551 states have (on average 1.7949823598588788) internal successors, (4579), 2557 states have internal predecessors, (4579), 140 states have call successors, (140), 48 states have call predecessors, (140), 48 states have return successors, (140), 136 states have call predecessors, (140), 140 states have call successors, (140) [2024-11-14 05:13:53,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 4859 transitions. [2024-11-14 05:13:53,931 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 4859 transitions. Word has length 109 [2024-11-14 05:13:53,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:53,931 INFO L471 AbstractCegarLoop]: Abstraction has 2741 states and 4859 transitions. [2024-11-14 05:13:53,932 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 4859 transitions. [2024-11-14 05:13:53,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:13:53,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:53,943 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] [2024-11-14 05:13:53,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 05:13:54,143 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:54,143 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:54,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1560886051, now seen corresponding path program 1 times [2024-11-14 05:13:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794049664] [2024-11-14 05:13:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:54,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:54,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:13:54,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:54,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794049664] [2024-11-14 05:13:54,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794049664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:54,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561950295] [2024-11-14 05:13:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:54,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:54,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:54,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:54,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:13:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:54,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:13:54,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 05:13:54,609 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:13:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561950295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:54,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:13:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:13:54,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306373118] [2024-11-14 05:13:54,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:54,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:54,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:54,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:54,612 INFO L87 Difference]: Start difference. First operand 2741 states and 4859 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:55,270 INFO L93 Difference]: Finished difference Result 4906 states and 8064 transitions. [2024-11-14 05:13:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:55,271 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2024-11-14 05:13:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:55,298 INFO L225 Difference]: With dead ends: 4906 [2024-11-14 05:13:55,299 INFO L226 Difference]: Without dead ends: 3811 [2024-11-14 05:13:55,304 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:55,305 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3465 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3465 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:55,305 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3465 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:13:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2024-11-14 05:13:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3801. [2024-11-14 05:13:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3435 states have (on average 1.6998544395924309) internal successors, (5839), 3445 states have internal predecessors, (5839), 268 states have call successors, (268), 96 states have call predecessors, (268), 96 states have return successors, (268), 260 states have call predecessors, (268), 268 states have call successors, (268) [2024-11-14 05:13:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 6375 transitions. [2024-11-14 05:13:55,669 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 6375 transitions. Word has length 109 [2024-11-14 05:13:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:55,670 INFO L471 AbstractCegarLoop]: Abstraction has 3801 states and 6375 transitions. [2024-11-14 05:13:55,670 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 6375 transitions. [2024-11-14 05:13:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:13:55,679 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:55,679 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] [2024-11-14 05:13:55,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 05:13:55,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:55,880 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:55,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -785890691, now seen corresponding path program 1 times [2024-11-14 05:13:55,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:55,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740786450] [2024-11-14 05:13:55,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:55,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:13:56,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:56,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740786450] [2024-11-14 05:13:56,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740786450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:56,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906938150] [2024-11-14 05:13:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:56,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:56,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:56,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:13:56,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:56,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:13:56,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 05:13:56,387 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:13:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906938150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:13:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:13:56,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142448982] [2024-11-14 05:13:56,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:56,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:56,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:56,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:56,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:56,393 INFO L87 Difference]: Start difference. First operand 3801 states and 6375 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:57,111 INFO L93 Difference]: Finished difference Result 8062 states and 12644 transitions. [2024-11-14 05:13:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:57,112 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 109 [2024-11-14 05:13:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:57,144 INFO L225 Difference]: With dead ends: 8062 [2024-11-14 05:13:57,145 INFO L226 Difference]: Without dead ends: 5907 [2024-11-14 05:13:57,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:13:57,155 INFO L432 NwaCegarLoop]: 3238 mSDtfsCounter, 3450 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3450 SdHoareTripleChecker+Valid, 3412 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:57,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3450 Valid, 3412 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:13:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5907 states. [2024-11-14 05:13:57,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5907 to 5889. [2024-11-14 05:13:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5889 states, 5179 states have (on average 1.604749951728133) internal successors, (8311), 5197 states have internal predecessors, (8311), 516 states have call successors, (516), 192 states have call predecessors, (516), 192 states have return successors, (516), 500 states have call predecessors, (516), 516 states have call successors, (516) [2024-11-14 05:13:57,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9343 transitions. [2024-11-14 05:13:57,422 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9343 transitions. Word has length 109 [2024-11-14 05:13:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:57,423 INFO L471 AbstractCegarLoop]: Abstraction has 5889 states and 9343 transitions. [2024-11-14 05:13:57,423 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 05:13:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9343 transitions. [2024-11-14 05:13:57,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-14 05:13:57,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:57,433 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] [2024-11-14 05:13:57,454 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 05:13:57,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:57,634 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:57,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1709229859, now seen corresponding path program 1 times [2024-11-14 05:13:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:57,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978061276] [2024-11-14 05:13:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 05:13:57,777 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978061276] [2024-11-14 05:13:57,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978061276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:57,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:57,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:13:57,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104842957] [2024-11-14 05:13:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:57,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:57,779 INFO L87 Difference]: Start difference. First operand 5889 states and 9343 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:13:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:58,529 INFO L93 Difference]: Finished difference Result 9251 states and 14288 transitions. [2024-11-14 05:13:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:58,530 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2024-11-14 05:13:58,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:58,586 INFO L225 Difference]: With dead ends: 9251 [2024-11-14 05:13:58,586 INFO L226 Difference]: Without dead ends: 7089 [2024-11-14 05:13:58,599 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 [2024-11-14 05:13:58,600 INFO L432 NwaCegarLoop]: 3342 mSDtfsCounter, 99 mSDsluCounter, 3247 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 6589 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:58,601 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 6589 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:13:58,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7089 states. [2024-11-14 05:13:58,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7089 to 6753. [2024-11-14 05:13:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6753 states, 6011 states have (on average 1.603560139743803) internal successors, (9639), 6029 states have internal predecessors, (9639), 532 states have call successors, (532), 208 states have call predecessors, (532), 208 states have return successors, (532), 516 states have call predecessors, (532), 532 states have call successors, (532) [2024-11-14 05:13:58,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6753 states to 6753 states and 10703 transitions. [2024-11-14 05:13:58,885 INFO L78 Accepts]: Start accepts. Automaton has 6753 states and 10703 transitions. Word has length 109 [2024-11-14 05:13:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:58,885 INFO L471 AbstractCegarLoop]: Abstraction has 6753 states and 10703 transitions. [2024-11-14 05:13:58,885 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), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-14 05:13:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6753 states and 10703 transitions. [2024-11-14 05:13:58,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 05:13:58,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:58,903 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] [2024-11-14 05:13:58,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-14 05:13:58,903 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:58,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1851292195, now seen corresponding path program 1 times [2024-11-14 05:13:58,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:58,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672702876] [2024-11-14 05:13:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 05:13:59,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:59,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672702876] [2024-11-14 05:13:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672702876] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:13:59,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:13:59,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:13:59,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589296963] [2024-11-14 05:13:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:13:59,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:13:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:13:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:13:59,029 INFO L87 Difference]: Start difference. First operand 6753 states and 10703 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:13:59,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:59,803 INFO L93 Difference]: Finished difference Result 16822 states and 25588 transitions. [2024-11-14 05:13:59,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:13:59,804 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 05:13:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:59,858 INFO L225 Difference]: With dead ends: 16822 [2024-11-14 05:13:59,858 INFO L226 Difference]: Without dead ends: 11715 [2024-11-14 05:13:59,876 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 [2024-11-14 05:13:59,876 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3451 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:59,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3451 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:13:59,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11715 states. [2024-11-14 05:14:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11715 to 11665. [2024-11-14 05:14:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11665 states, 10219 states have (on average 1.5350817105391916) internal successors, (15687), 10253 states have internal predecessors, (15687), 1028 states have call successors, (1028), 416 states have call predecessors, (1028), 416 states have return successors, (1028), 996 states have call predecessors, (1028), 1028 states have call successors, (1028) [2024-11-14 05:14:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11665 states to 11665 states and 17743 transitions. [2024-11-14 05:14:00,511 INFO L78 Accepts]: Start accepts. Automaton has 11665 states and 17743 transitions. Word has length 148 [2024-11-14 05:14:00,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:00,513 INFO L471 AbstractCegarLoop]: Abstraction has 11665 states and 17743 transitions. [2024-11-14 05:14:00,514 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 11665 states and 17743 transitions. [2024-11-14 05:14:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 05:14:00,542 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:00,542 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] [2024-11-14 05:14:00,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 05:14:00,545 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:00,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:00,546 INFO L85 PathProgramCache]: Analyzing trace with hash 22540595, now seen corresponding path program 1 times [2024-11-14 05:14:00,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:00,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924862805] [2024-11-14 05:14:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 05:14:00,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:00,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924862805] [2024-11-14 05:14:00,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924862805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:00,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:14:00,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:14:00,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486818190] [2024-11-14 05:14:00,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:00,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:00,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:00,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:00,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:14:00,662 INFO L87 Difference]: Start difference. First operand 11665 states and 17743 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:02,044 INFO L93 Difference]: Finished difference Result 31414 states and 46708 transitions. [2024-11-14 05:14:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:02,044 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 05:14:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:02,146 INFO L225 Difference]: With dead ends: 31414 [2024-11-14 05:14:02,146 INFO L226 Difference]: Without dead ends: 21395 [2024-11-14 05:14:02,178 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 [2024-11-14 05:14:02,179 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3453 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3453 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:02,179 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3453 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21395 states. [2024-11-14 05:14:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21395 to 21297. [2024-11-14 05:14:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21297 states, 18475 states have (on average 1.4864952638700948) internal successors, (27463), 18541 states have internal predecessors, (27463), 1988 states have call successors, (1988), 832 states have call predecessors, (1988), 832 states have return successors, (1988), 1924 states have call predecessors, (1988), 1988 states have call successors, (1988) [2024-11-14 05:14:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21297 states to 21297 states and 31439 transitions. [2024-11-14 05:14:03,112 INFO L78 Accepts]: Start accepts. Automaton has 21297 states and 31439 transitions. Word has length 148 [2024-11-14 05:14:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:03,112 INFO L471 AbstractCegarLoop]: Abstraction has 21297 states and 31439 transitions. [2024-11-14 05:14:03,112 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 21297 states and 31439 transitions. [2024-11-14 05:14:03,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 05:14:03,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:03,168 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] [2024-11-14 05:14:03,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 05:14:03,168 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:03,168 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1142639284, now seen corresponding path program 1 times [2024-11-14 05:14:03,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:03,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858549427] [2024-11-14 05:14:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:03,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 05:14:03,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:03,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858549427] [2024-11-14 05:14:03,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858549427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:03,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:14:03,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:14:03,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919086062] [2024-11-14 05:14:03,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:03,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:03,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:03,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:03,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:14:03,292 INFO L87 Difference]: Start difference. First operand 21297 states and 31439 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:04,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:04,952 INFO L93 Difference]: Finished difference Result 60022 states and 87764 transitions. [2024-11-14 05:14:04,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:04,953 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 05:14:04,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:05,124 INFO L225 Difference]: With dead ends: 60022 [2024-11-14 05:14:05,124 INFO L226 Difference]: Without dead ends: 40371 [2024-11-14 05:14:05,167 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 [2024-11-14 05:14:05,168 INFO L432 NwaCegarLoop]: 3240 mSDtfsCounter, 3455 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3455 SdHoareTripleChecker+Valid, 3414 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:05,168 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3455 Valid, 3414 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40371 states. [2024-11-14 05:14:06,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40371 to 40177. [2024-11-14 05:14:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40177 states, 34667 states have (on average 1.453111027778579) internal successors, (50375), 34797 states have internal predecessors, (50375), 3844 states have call successors, (3844), 1664 states have call predecessors, (3844), 1664 states have return successors, (3844), 3716 states have call predecessors, (3844), 3844 states have call successors, (3844) [2024-11-14 05:14:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40177 states to 40177 states and 58063 transitions. [2024-11-14 05:14:06,600 INFO L78 Accepts]: Start accepts. Automaton has 40177 states and 58063 transitions. Word has length 148 [2024-11-14 05:14:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:06,600 INFO L471 AbstractCegarLoop]: Abstraction has 40177 states and 58063 transitions. [2024-11-14 05:14:06,600 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 40177 states and 58063 transitions. [2024-11-14 05:14:06,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 05:14:06,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:06,701 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] [2024-11-14 05:14:06,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-14 05:14:06,702 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:06,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:06,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1945319220, now seen corresponding path program 1 times [2024-11-14 05:14:06,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:06,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776463063] [2024-11-14 05:14:06,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:06,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-11-14 05:14:06,984 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:06,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776463063] [2024-11-14 05:14:06,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776463063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:06,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:14:06,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:14:06,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445071426] [2024-11-14 05:14:06,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:06,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:06,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:06,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 05:14:06,985 INFO L87 Difference]: Start difference. First operand 40177 states and 58063 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:10,269 INFO L93 Difference]: Finished difference Result 116086 states and 167508 transitions. [2024-11-14 05:14:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:10,270 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 148 [2024-11-14 05:14:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:10,714 INFO L225 Difference]: With dead ends: 116086 [2024-11-14 05:14:10,714 INFO L226 Difference]: Without dead ends: 77555 [2024-11-14 05:14:10,869 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 [2024-11-14 05:14:10,870 INFO L432 NwaCegarLoop]: 3258 mSDtfsCounter, 3458 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3458 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:10,871 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3458 Valid, 3432 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77555 states. [2024-11-14 05:14:13,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77555 to 77169. [2024-11-14 05:14:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77169 states, 66411 states have (on average 1.429266236015118) internal successors, (94919), 66669 states have internal predecessors, (94919), 7428 states have call successors, (7428), 3328 states have call predecessors, (7428), 3328 states have return successors, (7428), 7172 states have call predecessors, (7428), 7428 states have call successors, (7428) [2024-11-14 05:14:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77169 states to 77169 states and 109775 transitions. [2024-11-14 05:14:14,121 INFO L78 Accepts]: Start accepts. Automaton has 77169 states and 109775 transitions. Word has length 148 [2024-11-14 05:14:14,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:14,121 INFO L471 AbstractCegarLoop]: Abstraction has 77169 states and 109775 transitions. [2024-11-14 05:14:14,122 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-14 05:14:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77169 states and 109775 transitions. [2024-11-14 05:14:14,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 05:14:14,597 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:14,597 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] [2024-11-14 05:14:14,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-14 05:14:14,597 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:14,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1042703688, now seen corresponding path program 1 times [2024-11-14 05:14:14,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:14,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847850885] [2024-11-14 05:14:14,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:14,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 14 proven. 59 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-14 05:14:15,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:15,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847850885] [2024-11-14 05:14:15,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847850885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:15,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592325312] [2024-11-14 05:14:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:15,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:15,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:15,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:15,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:14:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:15,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 858 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:14:15,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:15,816 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-14 05:14:15,819 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:14:15,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592325312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:15,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:14:15,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:14:15,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728932313] [2024-11-14 05:14:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:15,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:15,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:15,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:15,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:15,825 INFO L87 Difference]: Start difference. First operand 77169 states and 109775 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:14:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:20,030 INFO L93 Difference]: Finished difference Result 146805 states and 210001 transitions. [2024-11-14 05:14:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:20,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 171 [2024-11-14 05:14:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:20,459 INFO L225 Difference]: With dead ends: 146805 [2024-11-14 05:14:20,459 INFO L226 Difference]: Without dead ends: 108275 [2024-11-14 05:14:20,535 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:20,536 INFO L432 NwaCegarLoop]: 3380 mSDtfsCounter, 148 mSDsluCounter, 3248 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 6628 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:20,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 6628 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:14:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108275 states. [2024-11-14 05:14:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108275 to 95345. [2024-11-14 05:14:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95345 states, 83819 states have (on average 1.4561734213006599) internal successors, (122055), 84077 states have internal predecessors, (122055), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2024-11-14 05:14:25,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95345 states to 95345 states and 137679 transitions. [2024-11-14 05:14:25,413 INFO L78 Accepts]: Start accepts. Automaton has 95345 states and 137679 transitions. Word has length 171 [2024-11-14 05:14:25,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:25,414 INFO L471 AbstractCegarLoop]: Abstraction has 95345 states and 137679 transitions. [2024-11-14 05:14:25,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:14:25,414 INFO L276 IsEmpty]: Start isEmpty. Operand 95345 states and 137679 transitions. [2024-11-14 05:14:25,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 05:14:25,920 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:25,920 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] [2024-11-14 05:14:25,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:14:26,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:26,121 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:26,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash -27234496, now seen corresponding path program 2 times [2024-11-14 05:14:26,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:26,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797482287] [2024-11-14 05:14:26,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:26,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:14:26,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:26,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797482287] [2024-11-14 05:14:26,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797482287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:26,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045159092] [2024-11-14 05:14:26,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:14:26,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:26,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:26,440 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:26,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:14:26,632 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 05:14:26,632 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:26,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:14:26,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-11-14 05:14:26,704 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:14:26,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045159092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:26,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:14:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:14:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989457906] [2024-11-14 05:14:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:26,706 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:26,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:26,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:26,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:26,709 INFO L87 Difference]: Start difference. First operand 95345 states and 137679 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:14:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:30,159 INFO L93 Difference]: Finished difference Result 152309 states and 222801 transitions. [2024-11-14 05:14:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:30,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 171 [2024-11-14 05:14:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:30,529 INFO L225 Difference]: With dead ends: 152309 [2024-11-14 05:14:30,530 INFO L226 Difference]: Without dead ends: 95603 [2024-11-14 05:14:30,633 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:30,634 INFO L432 NwaCegarLoop]: 3403 mSDtfsCounter, 180 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 6635 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:30,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 6635 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95603 states. [2024-11-14 05:14:33,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95603 to 95089. [2024-11-14 05:14:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95089 states, 83563 states have (on average 1.4453167071550805) internal successors, (120775), 83821 states have internal predecessors, (120775), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812) [2024-11-14 05:14:34,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95089 states to 95089 states and 136399 transitions. [2024-11-14 05:14:34,214 INFO L78 Accepts]: Start accepts. Automaton has 95089 states and 136399 transitions. Word has length 171 [2024-11-14 05:14:34,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:34,214 INFO L471 AbstractCegarLoop]: Abstraction has 95089 states and 136399 transitions. [2024-11-14 05:14:34,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-14 05:14:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 95089 states and 136399 transitions. [2024-11-14 05:14:34,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-11-14 05:14:34,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:34,387 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] [2024-11-14 05:14:34,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:14:34,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:34,587 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:34,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:34,588 INFO L85 PathProgramCache]: Analyzing trace with hash -891558560, now seen corresponding path program 1 times [2024-11-14 05:14:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451487813] [2024-11-14 05:14:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:34,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-14 05:14:34,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451487813] [2024-11-14 05:14:34,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451487813] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027442933] [2024-11-14 05:14:34,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:34,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:34,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:34,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dec33d36-40bf-47e9-ba4f-9e8977a56629/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:14:35,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:35,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 05:14:35,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 05:14:35,175 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:14:35,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027442933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:14:35,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:14:35,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-14 05:14:35,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174736039] [2024-11-14 05:14:35,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:14:35,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:14:35,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:35,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:14:35,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:35,178 INFO L87 Difference]: Start difference. First operand 95089 states and 136399 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-14 05:14:38,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:38,473 INFO L93 Difference]: Finished difference Result 143029 states and 207313 transitions. [2024-11-14 05:14:38,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:14:38,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 171 [2024-11-14 05:14:38,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:38,885 INFO L225 Difference]: With dead ends: 143029 [2024-11-14 05:14:38,885 INFO L226 Difference]: Without dead ends: 95347 [2024-11-14 05:14:38,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-14 05:14:38,990 INFO L432 NwaCegarLoop]: 3386 mSDtfsCounter, 179 mSDsluCounter, 3231 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 6617 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:38,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 6617 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95347 states. [2024-11-14 05:14:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95347 to 94449. [2024-11-14 05:14:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94449 states, 82923 states have (on average 1.431774055449031) internal successors, (118727), 83181 states have internal predecessors, (118727), 7812 states have call successors, (7812), 3712 states have call predecessors, (7812), 3712 states have return successors, (7812), 7556 states have call predecessors, (7812), 7812 states have call successors, (7812)