./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f02c38ef7caa0913e815c21ae4fcfcf6b07193a4f02fe1bf68067d0ca7ac604d --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:03:38,011 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:03:38,107 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:03:38,116 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:03:38,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:03:38,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:03:38,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:03:38,158 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:03:38,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:03:38,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:03:38,159 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:03:38,159 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:03:38,160 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:03:38,160 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:03:38,161 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:03:38,161 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:03:38,162 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:03:38,162 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:03:38,162 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:03:38,163 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:03:38,163 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:03:38,167 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:03:38,168 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:03:38,168 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:03:38,169 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:03:38,169 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:03:38,169 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:03:38,169 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:03:38,170 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:03:38,170 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:03:38,171 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:03:38,172 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:03:38,172 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:03:38,173 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:03:38,173 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:03:38,174 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:03:38,174 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:03:38,175 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:03:38,175 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:03:38,176 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:03:38,176 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:03:38,176 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:03:38,177 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:03:38,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:03:38,178 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:03:38,178 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:03:38,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:03:38,179 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f02c38ef7caa0913e815c21ae4fcfcf6b07193a4f02fe1bf68067d0ca7ac604d [2024-11-09 05:03:38,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:03:38,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:03:38,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:03:38,513 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:03:38,514 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:03:38,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c Unable to find full path for "g++" [2024-11-09 05:03:40,600 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:03:41,341 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:03:41,344 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c [2024-11-09 05:03:41,409 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/data/7a04e3720/152b343ae68a4ff8b17f0bebf27c158e/FLAG9fc429df3 [2024-11-09 05:03:41,434 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/data/7a04e3720/152b343ae68a4ff8b17f0bebf27c158e [2024-11-09 05:03:41,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:03:41,440 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:03:41,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:03:41,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:03:41,451 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:03:41,452 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:03:41" (1/1) ... [2024-11-09 05:03:41,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@170fc20b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:41, skipping insertion in model container [2024-11-09 05:03:41,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:03:41" (1/1) ... [2024-11-09 05:03:41,714 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:03:44,329 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_e95fa706-ba62-44c3-aefb-b2a1848d6632/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c[381679,381692] [2024-11-09 05:03:44,368 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_e95fa706-ba62-44c3-aefb-b2a1848d6632/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c[383339,383352] [2024-11-09 05:03:44,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:03:44,786 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:03:46,224 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_e95fa706-ba62-44c3-aefb-b2a1848d6632/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c[381679,381692] [2024-11-09 05:03:46,230 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_e95fa706-ba62-44c3-aefb-b2a1848d6632/sv-benchmarks/c/combinations/Problem05_label43+token_ring.11.cil-2.c[383339,383352] [2024-11-09 05:03:46,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:03:46,356 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:03:46,357 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46 WrapperNode [2024-11-09 05:03:46,357 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:03:46,358 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:03:46,358 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:03:46,358 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:03:46,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:46,475 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,007 INFO L138 Inliner]: procedures = 66, calls = 74, calls flagged for inlining = 44, calls inlined = 44, statements flattened = 13158 [2024-11-09 05:03:47,008 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:03:47,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:03:47,009 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:03:47,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:03:47,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,321 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,366 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,391 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,410 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,573 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:03:47,574 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:03:47,575 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:03:47,575 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:03:47,576 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (1/1) ... [2024-11-09 05:03:47,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:03:47,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:47,664 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:03:47,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:03:47,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:03:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2024-11-09 05:03:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2024-11-09 05:03:47,746 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:03:47,746 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:03:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2024-11-09 05:03:47,747 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2024-11-09 05:03:47,747 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2024-11-09 05:03:47,747 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2024-11-09 05:03:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2024-11-09 05:03:47,748 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2024-11-09 05:03:47,748 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2024-11-09 05:03:47,749 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2024-11-09 05:03:47,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:03:47,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:03:47,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:03:48,046 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:03:48,051 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:03:59,780 INFO L? ?]: Removed 1749 outVars from TransFormulas that were not future-live. [2024-11-09 05:03:59,781 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:04:02,958 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:04:02,958 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-09 05:04:02,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:04:02 BoogieIcfgContainer [2024-11-09 05:04:02,959 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:04:02,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:04:02,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:04:02,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:04:02,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:03:41" (1/3) ... [2024-11-09 05:04:02,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31866702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:04:02, skipping insertion in model container [2024-11-09 05:04:02,967 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:03:46" (2/3) ... [2024-11-09 05:04:02,968 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31866702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:04:02, skipping insertion in model container [2024-11-09 05:04:02,968 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:04:02" (3/3) ... [2024-11-09 05:04:02,970 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.11.cil-2.c [2024-11-09 05:04:02,992 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:04:02,993 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:04:03,148 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:04:03,159 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;@607fe561, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:04:03,160 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:04:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-09 05:04:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-09 05:04:03,193 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:03,194 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:03,195 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:03,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:03,203 INFO L85 PathProgramCache]: Analyzing trace with hash -306458892, now seen corresponding path program 1 times [2024-11-09 05:04:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:03,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910345477] [2024-11-09 05:04:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:03,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:03,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 05:04:03,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:03,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910345477] [2024-11-09 05:04:03,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910345477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:03,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:03,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:04:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430946584] [2024-11-09 05:04:03,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:03,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:04:03,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:04:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:04:03,991 INFO L87 Difference]: Start difference. First operand has 1832 states, 1798 states have (on average 1.9516129032258065) internal successors, (3509), 1801 states have internal predecessors, (3509), 25 states have call successors, (25), 6 states have call predecessors, (25), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-09 05:04:05,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:05,416 INFO L93 Difference]: Finished difference Result 3836 states and 7407 transitions. [2024-11-09 05:04:05,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:04:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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 64 [2024-11-09 05:04:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:05,442 INFO L225 Difference]: With dead ends: 3836 [2024-11-09 05:04:05,442 INFO L226 Difference]: Without dead ends: 2003 [2024-11-09 05:04:05,459 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:04:05,467 INFO L432 NwaCegarLoop]: 3505 mSDtfsCounter, 3770 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3770 SdHoareTripleChecker+Valid, 6916 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:05,468 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3770 Valid, 6916 Invalid, 724 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 05:04:05,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2003 states. [2024-11-09 05:04:05,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2003 to 2002. [2024-11-09 05:04:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 1942 states have (on average 1.9114315139031925) internal successors, (3712), 1945 states have internal predecessors, (3712), 46 states have call successors, (46), 12 states have call predecessors, (46), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-09 05:04:05,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 3804 transitions. [2024-11-09 05:04:05,678 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 3804 transitions. Word has length 64 [2024-11-09 05:04:05,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:05,678 INFO L471 AbstractCegarLoop]: Abstraction has 2002 states and 3804 transitions. [2024-11-09 05:04:05,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 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) [2024-11-09 05:04:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 3804 transitions. [2024-11-09 05:04:05,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:05,687 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:05,688 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:04:05,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:04:05,689 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:05,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:05,690 INFO L85 PathProgramCache]: Analyzing trace with hash -195692092, now seen corresponding path program 1 times [2024-11-09 05:04:05,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:05,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85852195] [2024-11-09 05:04:05,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:05,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:06,175 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:06,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85852195] [2024-11-09 05:04:06,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85852195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:06,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990357426] [2024-11-09 05:04:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:06,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:06,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:06,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:06,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:04:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:06,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 866 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:06,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:04:06,617 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:06,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990357426] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:06,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:06,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292723553] [2024-11-09 05:04:06,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:06,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:06,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:06,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:06,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:06,621 INFO L87 Difference]: Start difference. First operand 2002 states and 3804 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2024-11-09 05:04:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:07,273 INFO L93 Difference]: Finished difference Result 2707 states and 4877 transitions. [2024-11-09 05:04:07,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:07,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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 130 [2024-11-09 05:04:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:07,289 INFO L225 Difference]: With dead ends: 2707 [2024-11-09 05:04:07,289 INFO L226 Difference]: Without dead ends: 2351 [2024-11-09 05:04:07,292 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:07,294 INFO L432 NwaCegarLoop]: 3337 mSDtfsCounter, 3501 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3501 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:07,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3501 Valid, 3559 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:07,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2024-11-09 05:04:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 2347. [2024-11-09 05:04:07,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2235 states have (on average 1.8527964205816554) internal successors, (4141), 2239 states have internal predecessors, (4141), 86 states have call successors, (86), 24 states have call predecessors, (86), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-09 05:04:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 4313 transitions. [2024-11-09 05:04:07,387 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 4313 transitions. Word has length 130 [2024-11-09 05:04:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:07,387 INFO L471 AbstractCegarLoop]: Abstraction has 2347 states and 4313 transitions. [2024-11-09 05:04:07,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 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) [2024-11-09 05:04:07,388 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 4313 transitions. [2024-11-09 05:04:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:07,394 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:07,394 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:07,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:04:07,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:07,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:07,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1298901182, now seen corresponding path program 1 times [2024-11-09 05:04:07,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:07,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230651400] [2024-11-09 05:04:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:07,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:07,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230651400] [2024-11-09 05:04:07,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230651400] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:07,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594152927] [2024-11-09 05:04:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:07,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:07,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:07,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:07,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:04:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:08,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:08,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 05:04:08,177 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:08,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594152927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:08,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:08,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780139024] [2024-11-09 05:04:08,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:08,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:08,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:08,181 INFO L87 Difference]: Start difference. First operand 2347 states and 4313 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) [2024-11-09 05:04:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:08,940 INFO L93 Difference]: Finished difference Result 3736 states and 6420 transitions. [2024-11-09 05:04:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:08,941 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 130 [2024-11-09 05:04:08,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:08,959 INFO L225 Difference]: With dead ends: 3736 [2024-11-09 05:04:08,959 INFO L226 Difference]: Without dead ends: 3035 [2024-11-09 05:04:08,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:08,966 INFO L432 NwaCegarLoop]: 3335 mSDtfsCounter, 3519 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 3557 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:08,966 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3519 Valid, 3557 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:04:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3035 states. [2024-11-09 05:04:09,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3035 to 3029. [2024-11-09 05:04:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 2815 states have (on average 1.7715808170515097) internal successors, (4987), 2821 states have internal predecessors, (4987), 164 states have call successors, (164), 48 states have call predecessors, (164), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2024-11-09 05:04:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 5315 transitions. [2024-11-09 05:04:09,105 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 5315 transitions. Word has length 130 [2024-11-09 05:04:09,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:09,106 INFO L471 AbstractCegarLoop]: Abstraction has 3029 states and 5315 transitions. [2024-11-09 05:04:09,106 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) [2024-11-09 05:04:09,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 5315 transitions. [2024-11-09 05:04:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:09,111 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:09,112 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:09,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:04:09,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:09,312 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:09,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1129213632, now seen corresponding path program 1 times [2024-11-09 05:04:09,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:09,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018249051] [2024-11-09 05:04:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:09,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:09,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018249051] [2024-11-09 05:04:09,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018249051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:09,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716715482] [2024-11-09 05:04:09,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:09,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:09,533 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:09,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:04:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:09,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 854 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:09,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:04:09,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:09,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716715482] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:09,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:09,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:09,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116775977] [2024-11-09 05:04:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:09,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:09,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:09,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:09,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:09,865 INFO L87 Difference]: Start difference. First operand 3029 states and 5315 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2024-11-09 05:04:10,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:10,547 INFO L93 Difference]: Finished difference Result 5770 states and 9456 transitions. [2024-11-09 05:04:10,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:10,548 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 130 [2024-11-09 05:04:10,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:10,574 INFO L225 Difference]: With dead ends: 5770 [2024-11-09 05:04:10,575 INFO L226 Difference]: Without dead ends: 4387 [2024-11-09 05:04:10,581 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:10,583 INFO L432 NwaCegarLoop]: 3286 mSDtfsCounter, 3513 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3513 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:10,584 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3513 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:10,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4387 states. [2024-11-09 05:04:10,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4387 to 4377. [2024-11-09 05:04:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4377 states, 3963 states have (on average 1.679283371183447) internal successors, (6655), 3973 states have internal predecessors, (6655), 316 states have call successors, (316), 96 states have call predecessors, (316), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2024-11-09 05:04:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4377 states to 4377 states and 7287 transitions. [2024-11-09 05:04:10,792 INFO L78 Accepts]: Start accepts. Automaton has 4377 states and 7287 transitions. Word has length 130 [2024-11-09 05:04:10,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:10,793 INFO L471 AbstractCegarLoop]: Abstraction has 4377 states and 7287 transitions. [2024-11-09 05:04:10,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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) [2024-11-09 05:04:10,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4377 states and 7287 transitions. [2024-11-09 05:04:10,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:10,804 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:10,804 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:10,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:04:11,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:11,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:11,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 197763518, now seen corresponding path program 1 times [2024-11-09 05:04:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:11,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338697008] [2024-11-09 05:04:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:11,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:11,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:11,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338697008] [2024-11-09 05:04:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338697008] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065705233] [2024-11-09 05:04:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:11,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:11,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:11,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:11,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:04:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:11,468 INFO L255 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:11,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:11,517 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 05:04:11,518 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:11,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065705233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:11,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:11,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:11,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257229057] [2024-11-09 05:04:11,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:11,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:11,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:11,525 INFO L87 Difference]: Start difference. First operand 4377 states and 7287 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2024-11-09 05:04:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:12,268 INFO L93 Difference]: Finished difference Result 9790 states and 15428 transitions. [2024-11-09 05:04:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:12,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 130 [2024-11-09 05:04:12,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:12,306 INFO L225 Difference]: With dead ends: 9790 [2024-11-09 05:04:12,306 INFO L226 Difference]: Without dead ends: 7059 [2024-11-09 05:04:12,321 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:12,322 INFO L432 NwaCegarLoop]: 3331 mSDtfsCounter, 3522 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3522 SdHoareTripleChecker+Valid, 3553 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:12,322 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3522 Valid, 3553 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:12,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7059 states. [2024-11-09 05:04:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7059 to 7041. [2024-11-09 05:04:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 6235 states have (on average 1.5947072975140337) internal successors, (9943), 6253 states have internal predecessors, (9943), 612 states have call successors, (612), 192 states have call predecessors, (612), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2024-11-09 05:04:12,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 11167 transitions. [2024-11-09 05:04:12,845 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 11167 transitions. Word has length 130 [2024-11-09 05:04:12,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:12,845 INFO L471 AbstractCegarLoop]: Abstraction has 7041 states and 11167 transitions. [2024-11-09 05:04:12,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2024-11-09 05:04:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 11167 transitions. [2024-11-09 05:04:12,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:12,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:12,862 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:12,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:04:13,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:13,063 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:13,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash 183058176, now seen corresponding path program 1 times [2024-11-09 05:04:13,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:13,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376002273] [2024-11-09 05:04:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:13,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:13,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:13,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376002273] [2024-11-09 05:04:13,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376002273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:13,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726400513] [2024-11-09 05:04:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:13,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:13,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:13,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:13,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:04:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:13,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 842 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:13,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:04:13,685 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:13,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726400513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:13,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:13,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:13,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728367286] [2024-11-09 05:04:13,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:13,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:13,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:13,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:13,690 INFO L87 Difference]: Start difference. First operand 7041 states and 11167 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2024-11-09 05:04:14,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:14,793 INFO L93 Difference]: Finished difference Result 17734 states and 27172 transitions. [2024-11-09 05:04:14,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:14,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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 130 [2024-11-09 05:04:14,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:14,916 INFO L225 Difference]: With dead ends: 17734 [2024-11-09 05:04:14,917 INFO L226 Difference]: Without dead ends: 12339 [2024-11-09 05:04:14,944 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:14,946 INFO L432 NwaCegarLoop]: 3286 mSDtfsCounter, 3495 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3495 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:14,946 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3495 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:04:14,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12339 states. [2024-11-09 05:04:15,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12339 to 12305. [2024-11-09 05:04:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12305 states, 10731 states have (on average 1.5304258689777281) internal successors, (16423), 10765 states have internal predecessors, (16423), 1188 states have call successors, (1188), 384 states have call predecessors, (1188), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2024-11-09 05:04:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12305 states to 12305 states and 18799 transitions. [2024-11-09 05:04:15,705 INFO L78 Accepts]: Start accepts. Automaton has 12305 states and 18799 transitions. Word has length 130 [2024-11-09 05:04:15,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:15,707 INFO L471 AbstractCegarLoop]: Abstraction has 12305 states and 18799 transitions. [2024-11-09 05:04:15,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 2 states have internal predecessors, (106), 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) [2024-11-09 05:04:15,708 INFO L276 IsEmpty]: Start isEmpty. Operand 12305 states and 18799 transitions. [2024-11-09 05:04:15,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:15,728 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:15,729 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:15,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 05:04:15,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 05:04:15,933 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:15,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2023953150, now seen corresponding path program 1 times [2024-11-09 05:04:15,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:15,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183666724] [2024-11-09 05:04:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:15,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:16,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:16,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183666724] [2024-11-09 05:04:16,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183666724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:16,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542422409] [2024-11-09 05:04:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:16,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:16,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:04:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:16,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:16,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:04:16,450 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:16,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542422409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:16,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:16,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455025023] [2024-11-09 05:04:16,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:16,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:16,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:16,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:16,453 INFO L87 Difference]: Start difference. First operand 12305 states and 18799 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2024-11-09 05:04:17,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:17,762 INFO L93 Difference]: Finished difference Result 33430 states and 50260 transitions. [2024-11-09 05:04:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:17,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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 130 [2024-11-09 05:04:17,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:17,877 INFO L225 Difference]: With dead ends: 33430 [2024-11-09 05:04:17,877 INFO L226 Difference]: Without dead ends: 22771 [2024-11-09 05:04:17,929 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:17,930 INFO L432 NwaCegarLoop]: 3286 mSDtfsCounter, 3507 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3507 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:17,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3507 Valid, 3508 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:17,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22771 states. [2024-11-09 05:04:18,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22771 to 22705. [2024-11-09 05:04:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 19627 states have (on average 1.4872879197024507) internal successors, (29191), 19693 states have internal predecessors, (29191), 2308 states have call successors, (2308), 768 states have call predecessors, (2308), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2024-11-09 05:04:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 33807 transitions. [2024-11-09 05:04:18,973 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 33807 transitions. Word has length 130 [2024-11-09 05:04:18,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:18,974 INFO L471 AbstractCegarLoop]: Abstraction has 22705 states and 33807 transitions. [2024-11-09 05:04:18,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 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) [2024-11-09 05:04:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 33807 transitions. [2024-11-09 05:04:19,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-09 05:04:19,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:19,011 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:19,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:04:19,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-09 05:04:19,212 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:19,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1120347652, now seen corresponding path program 1 times [2024-11-09 05:04:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:19,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212591665] [2024-11-09 05:04:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-09 05:04:19,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:19,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212591665] [2024-11-09 05:04:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212591665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:19,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:04:19,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765223272] [2024-11-09 05:04:19,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:19,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:04:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:19,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:04:19,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:19,933 INFO L87 Difference]: Start difference. First operand 22705 states and 33807 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:04:22,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:22,788 INFO L93 Difference]: Finished difference Result 69429 states and 102033 transitions. [2024-11-09 05:04:22,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:04:22,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2024-11-09 05:04:22,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:23,033 INFO L225 Difference]: With dead ends: 69429 [2024-11-09 05:04:23,033 INFO L226 Difference]: Without dead ends: 48371 [2024-11-09 05:04:23,098 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-09 05:04:23,099 INFO L432 NwaCegarLoop]: 3302 mSDtfsCounter, 4073 mSDsluCounter, 6560 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4093 SdHoareTripleChecker+Valid, 9862 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:23,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4093 Valid, 9862 Invalid, 1026 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [113 Valid, 913 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 05:04:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48371 states. [2024-11-09 05:04:25,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48371 to 42993. [2024-11-09 05:04:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42993 states, 36971 states have (on average 1.4594952800843906) internal successors, (53959), 37101 states have internal predecessors, (53959), 4484 states have call successors, (4484), 1536 states have call predecessors, (4484), 1536 states have return successors, (4484), 4356 states have call predecessors, (4484), 4484 states have call successors, (4484) [2024-11-09 05:04:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42993 states to 42993 states and 62927 transitions. [2024-11-09 05:04:26,238 INFO L78 Accepts]: Start accepts. Automaton has 42993 states and 62927 transitions. Word has length 130 [2024-11-09 05:04:26,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:26,238 INFO L471 AbstractCegarLoop]: Abstraction has 42993 states and 62927 transitions. [2024-11-09 05:04:26,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-09 05:04:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 42993 states and 62927 transitions. [2024-11-09 05:04:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-09 05:04:26,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:26,467 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-09 05:04:26,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 05:04:26,468 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:26,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1248929702, now seen corresponding path program 1 times [2024-11-09 05:04:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67828450] [2024-11-09 05:04:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:26,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:04:27,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67828450] [2024-11-09 05:04:27,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67828450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557351589] [2024-11-09 05:04:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:27,022 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:27,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:04:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:27,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:27,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 05:04:27,362 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:27,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557351589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:27,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:27,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:04:27,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915684129] [2024-11-09 05:04:27,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:27,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:27,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:27,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:27,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:27,368 INFO L87 Difference]: Start difference. First operand 42993 states and 62927 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:04:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:29,863 INFO L93 Difference]: Finished difference Result 75699 states and 111504 transitions. [2024-11-09 05:04:29,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:29,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 152 [2024-11-09 05:04:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:30,292 INFO L225 Difference]: With dead ends: 75699 [2024-11-09 05:04:30,293 INFO L226 Difference]: Without dead ends: 54705 [2024-11-09 05:04:30,343 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:30,346 INFO L432 NwaCegarLoop]: 3419 mSDtfsCounter, 127 mSDsluCounter, 3297 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 6716 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:30,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 6716 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:04:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54705 states. [2024-11-09 05:04:32,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54705 to 51825. [2024-11-09 05:04:32,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51825 states, 45547 states have (on average 1.4853887193448525) internal successors, (67655), 45677 states have internal predecessors, (67655), 4612 states have call successors, (4612), 1664 states have call predecessors, (4612), 1664 states have return successors, (4612), 4484 states have call predecessors, (4612), 4612 states have call successors, (4612) [2024-11-09 05:04:32,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51825 states to 51825 states and 76879 transitions. [2024-11-09 05:04:32,774 INFO L78 Accepts]: Start accepts. Automaton has 51825 states and 76879 transitions. Word has length 152 [2024-11-09 05:04:32,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:32,776 INFO L471 AbstractCegarLoop]: Abstraction has 51825 states and 76879 transitions. [2024-11-09 05:04:32,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 05:04:32,776 INFO L276 IsEmpty]: Start isEmpty. Operand 51825 states and 76879 transitions. [2024-11-09 05:04:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-09 05:04:33,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:33,209 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:33,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:04:33,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:33,411 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:33,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:33,412 INFO L85 PathProgramCache]: Analyzing trace with hash -725341064, now seen corresponding path program 1 times [2024-11-09 05:04:33,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:33,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764180126] [2024-11-09 05:04:33,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:33,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:04:33,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:33,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764180126] [2024-11-09 05:04:33,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764180126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:33,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470909366] [2024-11-09 05:04:33,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:33,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:33,984 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:04:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:34,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:34,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-09 05:04:34,573 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:34,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470909366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:34,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:34,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 05:04:34,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977100525] [2024-11-09 05:04:34,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:34,575 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:34,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:34,577 INFO L87 Difference]: Start difference. First operand 51825 states and 76879 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 05:04:39,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:39,055 INFO L93 Difference]: Finished difference Result 151414 states and 225492 transitions. [2024-11-09 05:04:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 200 [2024-11-09 05:04:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:39,568 INFO L225 Difference]: With dead ends: 151414 [2024-11-09 05:04:39,568 INFO L226 Difference]: Without dead ends: 101235 [2024-11-09 05:04:39,695 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:39,696 INFO L432 NwaCegarLoop]: 3299 mSDtfsCounter, 3449 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:39,697 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 3521 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:04:39,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101235 states. [2024-11-09 05:04:44,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101235 to 100849. [2024-11-09 05:04:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100849 states, 88555 states have (on average 1.4708034554796454) internal successors, (130247), 88813 states have internal predecessors, (130247), 8964 states have call successors, (8964), 3328 states have call predecessors, (8964), 3328 states have return successors, (8964), 8708 states have call predecessors, (8964), 8964 states have call successors, (8964) [2024-11-09 05:04:45,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100849 states to 100849 states and 148175 transitions. [2024-11-09 05:04:45,104 INFO L78 Accepts]: Start accepts. Automaton has 100849 states and 148175 transitions. Word has length 200 [2024-11-09 05:04:45,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:45,105 INFO L471 AbstractCegarLoop]: Abstraction has 100849 states and 148175 transitions. [2024-11-09 05:04:45,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 05:04:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 100849 states and 148175 transitions. [2024-11-09 05:04:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-11-09 05:04:45,357 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:45,357 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 05:04:45,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:04:45,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:45,558 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:45,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash -901814389, now seen corresponding path program 1 times [2024-11-09 05:04:45,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:45,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576348443] [2024-11-09 05:04:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:46,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 10 proven. 75 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-09 05:04:46,772 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:46,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576348443] [2024-11-09 05:04:46,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576348443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:46,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588810159] [2024-11-09 05:04:46,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:46,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:46,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:46,776 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:46,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e95fa706-ba62-44c3-aefb-b2a1848d6632/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:04:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:47,174 INFO L255 TraceCheckSpWp]: Trace formula consists of 1064 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:47,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:04:47,469 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:47,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588810159] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:47,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:47,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-09 05:04:47,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625395619] [2024-11-09 05:04:47,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:47,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:47,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:47,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:47,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:47,473 INFO L87 Difference]: Start difference. First operand 100849 states and 148175 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-11-09 05:04:55,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:55,116 INFO L93 Difference]: Finished difference Result 297718 states and 440532 transitions. [2024-11-09 05:04:55,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:55,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 200 [2024-11-09 05:04:55,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:56,582 INFO L225 Difference]: With dead ends: 297718 [2024-11-09 05:04:56,583 INFO L226 Difference]: Without dead ends: 198515 [2024-11-09 05:04:56,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:04:56,904 INFO L432 NwaCegarLoop]: 3299 mSDtfsCounter, 3449 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3449 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:56,904 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3449 Valid, 3521 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:04:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198515 states.