./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire --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 a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:10:26,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:10:26,153 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:10:26,159 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:10:26,160 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:10:26,184 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:10:26,185 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:10:26,186 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:10:26,187 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:10:26,187 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:10:26,188 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:10:26,189 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:10:26,189 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:10:26,190 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:10:26,191 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:10:26,191 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:10:26,192 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:10:26,193 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:10:26,193 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:10:26,194 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:10:26,195 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:10:26,203 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:10:26,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:10:26,205 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:10:26,207 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:10:26,208 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:10:26,209 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:10:26,209 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:10:26,209 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:10:26,210 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:10:26,211 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:10:26,212 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:10:26,212 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:10:26,213 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:10:26,213 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:10:26,213 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:10:26,214 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:10:26,214 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:26,214 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:10:26,215 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:10:26,215 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:10:26,216 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:10:26,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:10:26,217 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:10:26,217 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:10:26,217 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:10:26,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:10:26,218 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9fe331e5302255756e033832e890b54b7bae1c0bb354f9ba1bbe18985f952e5 [2023-11-23 21:10:26,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:10:26,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:10:26,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:10:26,614 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:10:26,614 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:10:26,616 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-11-23 21:10:29,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:10:30,253 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:10:30,254 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-11-23 21:10:30,275 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/data/884f9bb09/cdda7a7ba17547b19f5d2c62a227c1de/FLAG0b7b98812 [2023-11-23 21:10:30,290 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/data/884f9bb09/cdda7a7ba17547b19f5d2c62a227c1de [2023-11-23 21:10:30,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:10:30,294 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:10:30,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:30,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:10:30,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:10:30,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:30,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@776eb61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30, skipping insertion in model container [2023-11-23 21:10:30,312 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:30,385 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:10:30,607 WARN L240 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2023-11-23 21:10:30,662 WARN L240 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2023-11-23 21:10:30,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:30,837 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:10:30,854 WARN L240 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[913,926] [2023-11-23 21:10:30,876 WARN L240 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_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.15.cil.c[5977,5990] [2023-11-23 21:10:30,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:10:30,968 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:10:30,968 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30 WrapperNode [2023-11-23 21:10:30,969 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:10:30,970 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:30,970 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:10:30,970 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:10:30,978 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:30,997 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,065 INFO L138 Inliner]: procedures = 74, calls = 88, calls flagged for inlining = 48, calls inlined = 48, statements flattened = 1149 [2023-11-23 21:10:31,066 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:10:31,067 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:10:31,067 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:10:31,067 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:10:31,076 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,110 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,132 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,140 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:10:31,155 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:10:31,155 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:10:31,155 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:10:31,157 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (1/1) ... [2023-11-23 21:10:31,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:10:31,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:31,192 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:10:31,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:10:31,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:10:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:10:31,259 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:10:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 21:10:31,259 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 21:10:31,259 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:10:31,259 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:10:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:10:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:10:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:10:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:10:31,260 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:10:31,260 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:10:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:10:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:10:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:10:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:10:31,261 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:10:31,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:10:31,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:10:31,312 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:10:31,313 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:10:31,313 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 21:10:31,313 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 21:10:31,505 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:10:31,508 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:10:32,556 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:10:33,338 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:10:33,339 INFO L309 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-23 21:10:33,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:33 BoogieIcfgContainer [2023-11-23 21:10:33,341 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:10:33,344 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:10:33,345 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:10:33,348 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:10:33,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:10:30" (1/3) ... [2023-11-23 21:10:33,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3587adf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:33, skipping insertion in model container [2023-11-23 21:10:33,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:10:30" (2/3) ... [2023-11-23 21:10:33,351 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3587adf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:10:33, skipping insertion in model container [2023-11-23 21:10:33,352 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:10:33" (3/3) ... [2023-11-23 21:10:33,353 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.15.cil.c [2023-11-23 21:10:33,375 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:10:33,375 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:10:33,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:10:33,469 INFO L357 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, mHoare=true, 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;@250e2f01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:10:33,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:10:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 270 states, 222 states have (on average 1.5360360360360361) internal successors, (341), 229 states have internal predecessors, (341), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:10:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:10:33,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:33,491 INFO L195 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] [2023-11-23 21:10:33,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:33,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1106346066, now seen corresponding path program 1 times [2023-11-23 21:10:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:33,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602643507] [2023-11-23 21:10:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:33,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:10:33,908 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:33,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602643507] [2023-11-23 21:10:33,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602643507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:33,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:33,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:33,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936571832] [2023-11-23 21:10:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:33,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:33,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:33,953 INFO L87 Difference]: Start difference. First operand has 270 states, 222 states have (on average 1.5360360360360361) internal successors, (341), 229 states have internal predecessors, (341), 35 states have call successors, (35), 10 states have call predecessors, (35), 10 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:34,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:34,175 INFO L93 Difference]: Finished difference Result 572 states and 870 transitions. [2023-11-23 21:10:34,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-23 21:10:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:34,191 INFO L225 Difference]: With dead ends: 572 [2023-11-23 21:10:34,191 INFO L226 Difference]: Without dead ends: 302 [2023-11-23 21:10:34,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:34,205 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 376 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:34,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 402 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:34,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-11-23 21:10:34,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 298. [2023-11-23 21:10:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 248 states have (on average 1.4838709677419355) internal successors, (368), 252 states have internal predecessors, (368), 38 states have call successors, (38), 12 states have call predecessors, (38), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-23 21:10:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 440 transitions. [2023-11-23 21:10:34,320 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 440 transitions. Word has length 28 [2023-11-23 21:10:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:34,321 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 440 transitions. [2023-11-23 21:10:34,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 440 transitions. [2023-11-23 21:10:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:10:34,325 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:34,326 INFO L195 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] [2023-11-23 21:10:34,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:10:34,326 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:34,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:34,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1295160588, now seen corresponding path program 1 times [2023-11-23 21:10:34,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:34,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152625083] [2023-11-23 21:10:34,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:34,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:34,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:10:34,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152625083] [2023-11-23 21:10:34,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152625083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:34,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:34,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:34,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771975193] [2023-11-23 21:10:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:34,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:34,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:34,436 INFO L87 Difference]: Start difference. First operand 298 states and 440 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:34,617 INFO L93 Difference]: Finished difference Result 454 states and 657 transitions. [2023-11-23 21:10:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:34,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-23 21:10:34,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:34,622 INFO L225 Difference]: With dead ends: 454 [2023-11-23 21:10:34,622 INFO L226 Difference]: Without dead ends: 373 [2023-11-23 21:10:34,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:34,625 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 374 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:34,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 386 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-23 21:10:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 369. [2023-11-23 21:10:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 308 states have (on average 1.4577922077922079) internal successors, (449), 312 states have internal predecessors, (449), 45 states have call successors, (45), 16 states have call predecessors, (45), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-23 21:10:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 535 transitions. [2023-11-23 21:10:34,657 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 535 transitions. Word has length 29 [2023-11-23 21:10:34,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:34,657 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 535 transitions. [2023-11-23 21:10:34,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:34,658 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 535 transitions. [2023-11-23 21:10:34,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:10:34,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:34,660 INFO L195 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] [2023-11-23 21:10:34,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:10:34,661 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:34,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash -963497820, now seen corresponding path program 1 times [2023-11-23 21:10:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:34,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21312480] [2023-11-23 21:10:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:10:34,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21312480] [2023-11-23 21:10:34,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21312480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:34,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:34,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960950314] [2023-11-23 21:10:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:34,763 INFO L87 Difference]: Start difference. First operand 369 states and 535 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:34,986 INFO L93 Difference]: Finished difference Result 609 states and 863 transitions. [2023-11-23 21:10:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2023-11-23 21:10:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:34,992 INFO L225 Difference]: With dead ends: 609 [2023-11-23 21:10:34,993 INFO L226 Difference]: Without dead ends: 457 [2023-11-23 21:10:34,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:34,995 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 46 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:34,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 663 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:10:34,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-11-23 21:10:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 443. [2023-11-23 21:10:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.4393530997304582) internal successors, (534), 377 states have internal predecessors, (534), 51 states have call successors, (51), 21 states have call predecessors, (51), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:10:35,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 632 transitions. [2023-11-23 21:10:35,032 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 632 transitions. Word has length 30 [2023-11-23 21:10:35,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:35,033 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 632 transitions. [2023-11-23 21:10:35,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:10:35,033 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 632 transitions. [2023-11-23 21:10:35,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:10:35,036 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:35,036 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:10:35,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:10:35,037 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:35,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:35,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1411174177, now seen corresponding path program 1 times [2023-11-23 21:10:35,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:35,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240023350] [2023-11-23 21:10:35,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:35,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:10:35,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240023350] [2023-11-23 21:10:35,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240023350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:35,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:35,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998307551] [2023-11-23 21:10:35,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:35,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:35,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:35,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:35,136 INFO L87 Difference]: Start difference. First operand 443 states and 632 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:10:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:35,333 INFO L93 Difference]: Finished difference Result 606 states and 850 transitions. [2023-11-23 21:10:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2023-11-23 21:10:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:35,339 INFO L225 Difference]: With dead ends: 606 [2023-11-23 21:10:35,339 INFO L226 Difference]: Without dead ends: 448 [2023-11-23 21:10:35,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:35,341 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 32 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:35,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 697 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:10:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2023-11-23 21:10:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 437. [2023-11-23 21:10:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 365 states have (on average 1.4246575342465753) internal successors, (520), 371 states have internal predecessors, (520), 51 states have call successors, (51), 21 states have call predecessors, (51), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-23 21:10:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 618 transitions. [2023-11-23 21:10:35,373 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 618 transitions. Word has length 43 [2023-11-23 21:10:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:35,374 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 618 transitions. [2023-11-23 21:10:35,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:10:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 618 transitions. [2023-11-23 21:10:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:10:35,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:35,376 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:10:35,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:10:35,377 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:35,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:35,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1422814777, now seen corresponding path program 1 times [2023-11-23 21:10:35,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51307750] [2023-11-23 21:10:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 21:10:35,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:35,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51307750] [2023-11-23 21:10:35,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51307750] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:35,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:35,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:10:35,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643838840] [2023-11-23 21:10:35,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:35,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:10:35,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:35,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:10:35,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:35,438 INFO L87 Difference]: Start difference. First operand 437 states and 618 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:35,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:35,610 INFO L93 Difference]: Finished difference Result 686 states and 942 transitions. [2023-11-23 21:10:35,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:10:35,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-23 21:10:35,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:35,646 INFO L225 Difference]: With dead ends: 686 [2023-11-23 21:10:35,646 INFO L226 Difference]: Without dead ends: 483 [2023-11-23 21:10:35,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:10:35,648 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:35,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 385 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:10:35,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2023-11-23 21:10:35,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2023-11-23 21:10:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 404 states have (on average 1.3935643564356435) internal successors, (563), 410 states have internal predecessors, (563), 55 states have call successors, (55), 24 states have call predecessors, (55), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:10:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 669 transitions. [2023-11-23 21:10:35,704 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 669 transitions. Word has length 46 [2023-11-23 21:10:35,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:35,705 INFO L495 AbstractCegarLoop]: Abstraction has 483 states and 669 transitions. [2023-11-23 21:10:35,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 669 transitions. [2023-11-23 21:10:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:10:35,707 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:35,708 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-23 21:10:35,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:10:35,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:35,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash 541723894, now seen corresponding path program 1 times [2023-11-23 21:10:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:35,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232570234] [2023-11-23 21:10:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 21:10:35,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:35,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232570234] [2023-11-23 21:10:35,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232570234] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:35,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:10:35,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502070306] [2023-11-23 21:10:35,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:35,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:35,855 INFO L87 Difference]: Start difference. First operand 483 states and 669 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:36,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:36,262 INFO L93 Difference]: Finished difference Result 710 states and 969 transitions. [2023-11-23 21:10:36,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:10:36,263 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2023-11-23 21:10:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:36,267 INFO L225 Difference]: With dead ends: 710 [2023-11-23 21:10:36,268 INFO L226 Difference]: Without dead ends: 481 [2023-11-23 21:10:36,269 INFO L412 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 [2023-11-23 21:10:36,270 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 415 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 654 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:36,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 654 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:10:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2023-11-23 21:10:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 479. [2023-11-23 21:10:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 400 states have (on average 1.3675) internal successors, (547), 406 states have internal predecessors, (547), 55 states have call successors, (55), 24 states have call predecessors, (55), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:10:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 653 transitions. [2023-11-23 21:10:36,327 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 653 transitions. Word has length 47 [2023-11-23 21:10:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:36,328 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 653 transitions. [2023-11-23 21:10:36,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:10:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 653 transitions. [2023-11-23 21:10:36,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:10:36,330 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:36,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:36,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:10:36,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:36,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:36,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1414562549, now seen corresponding path program 1 times [2023-11-23 21:10:36,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:36,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718202003] [2023-11-23 21:10:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:36,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:36,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:10:36,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718202003] [2023-11-23 21:10:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718202003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:10:36,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:10:36,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:10:36,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361099750] [2023-11-23 21:10:36,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:10:36,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:10:36,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:10:36,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:10:36,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:10:36,517 INFO L87 Difference]: Start difference. First operand 479 states and 653 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:10:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:10:36,895 INFO L93 Difference]: Finished difference Result 515 states and 694 transitions. [2023-11-23 21:10:36,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:10:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2023-11-23 21:10:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:10:36,901 INFO L225 Difference]: With dead ends: 515 [2023-11-23 21:10:36,901 INFO L226 Difference]: Without dead ends: 512 [2023-11-23 21:10:36,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:10:36,905 INFO L413 NwaCegarLoop]: 340 mSDtfsCounter, 652 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:10:36,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 379 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:10:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2023-11-23 21:10:36,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 478. [2023-11-23 21:10:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 400 states have (on average 1.3625) internal successors, (545), 405 states have internal predecessors, (545), 54 states have call successors, (54), 24 states have call predecessors, (54), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-23 21:10:36,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 650 transitions. [2023-11-23 21:10:36,966 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 650 transitions. Word has length 47 [2023-11-23 21:10:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:10:36,968 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 650 transitions. [2023-11-23 21:10:36,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-23 21:10:36,969 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 650 transitions. [2023-11-23 21:10:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:10:36,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:10:36,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:10:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:10:36,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:10:36,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:10:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash 900269852, now seen corresponding path program 1 times [2023-11-23 21:10:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:10:36,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78195424] [2023-11-23 21:10:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:10:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:37,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:10:37,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:10:37,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78195424] [2023-11-23 21:10:37,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78195424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:10:37,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359580835] [2023-11-23 21:10:37,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:10:37,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:10:37,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:10:37,285 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:10:37,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bfc5f0d-d2d2-40f0-9c8f-777f797d9e20/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:10:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:10:37,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:10:37,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:10:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:10:37,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:10:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 21:10:37,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359580835] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:10:37,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777996875] [2023-11-23 21:10:37,890 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:10:37,890 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:10:37,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:10:37,901 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:10:37,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:10:51,532 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 191 for LOIs [2023-11-23 21:10:51,612 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 216 for LOIs [2023-11-23 21:10:51,766 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 216 for LOIs [2023-11-23 21:10:53,837 INFO L180 IcfgInterpreter]: Interpretation finished