./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.07.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_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/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_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.07.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/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_3bc88dac-0208-4add-bcbe-13aec67c286f/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 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:22:40,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:22:40,386 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:22:40,395 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:22:40,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:22:40,444 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:22:40,445 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:22:40,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:22:40,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:22:40,452 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:22:40,452 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:22:40,453 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:22:40,454 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:22:40,455 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:22:40,456 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:22:40,456 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:22:40,457 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:22:40,457 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:22:40,458 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:22:40,458 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:22:40,459 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:22:40,459 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:22:40,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:22:40,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:22:40,461 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:22:40,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:22:40,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:22:40,463 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:22:40,463 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:22:40,464 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:22:40,465 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:22:40,465 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:22:40,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:22:40,466 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:22:40,466 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:22:40,466 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:22:40,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:22:40,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:40,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:22:40,468 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:22:40,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:22:40,468 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:22:40,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:22:40,469 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:22:40,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:22:40,470 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:22:40,470 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:22:40,470 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_3bc88dac-0208-4add-bcbe-13aec67c286f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 022987cd4c8c671e376c5c3e5a08e2f1b98444b4d5d48bc73787bff74aa0de0f [2023-11-23 21:22:40,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:22:40,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:22:40,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:22:40,825 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:22:40,826 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:22:40,827 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-23 21:22:44,046 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:22:44,325 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:22:44,326 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/sv-benchmarks/c/systemc/transmitter.07.cil.c [2023-11-23 21:22:44,345 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/data/399afca4f/a5d86abcbf27403897e54b9f4b675b62/FLAGd06f7f387 [2023-11-23 21:22:44,366 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/data/399afca4f/a5d86abcbf27403897e54b9f4b675b62 [2023-11-23 21:22:44,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:22:44,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:22:44,381 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:44,382 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:22:44,387 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:22:44,388 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,389 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ff9f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44, skipping insertion in model container [2023-11-23 21:22:44,389 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:22:44,619 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_3bc88dac-0208-4add-bcbe-13aec67c286f/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-23 21:22:44,752 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:44,771 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:22:44,784 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_3bc88dac-0208-4add-bcbe-13aec67c286f/sv-benchmarks/c/systemc/transmitter.07.cil.c[706,719] [2023-11-23 21:22:44,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:22:44,858 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:22:44,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44 WrapperNode [2023-11-23 21:22:44,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:22:44,860 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:44,861 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:22:44,861 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:22:44,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,928 INFO L138 Inliner]: procedures = 42, calls = 51, calls flagged for inlining = 26, calls inlined = 26, statements flattened = 564 [2023-11-23 21:22:44,928 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:22:44,929 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:22:44,929 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:22:44,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:22:44,939 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,957 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,988 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:44,997 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:22:44,998 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:22:44,998 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:22:44,998 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:22:44,999 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (1/1) ... [2023-11-23 21:22:45,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:22:45,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:22:45,055 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:22:45,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc88dac-0208-4add-bcbe-13aec67c286f/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:22:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:22:45,100 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-23 21:22:45,101 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-23 21:22:45,101 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-23 21:22:45,105 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-23 21:22:45,105 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:22:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:22:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-23 21:22:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-23 21:22:45,106 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-23 21:22:45,106 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-23 21:22:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:22:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-23 21:22:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-23 21:22:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:22:45,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:22:45,234 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:22:45,236 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:22:45,949 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:22:46,361 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:22:46,362 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-23 21:22:46,363 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:46 BoogieIcfgContainer [2023-11-23 21:22:46,364 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:22:46,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:22:46,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:22:46,371 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:22:46,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:22:44" (1/3) ... [2023-11-23 21:22:46,373 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36565d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:46, skipping insertion in model container [2023-11-23 21:22:46,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:22:44" (2/3) ... [2023-11-23 21:22:46,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36565d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:22:46, skipping insertion in model container [2023-11-23 21:22:46,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:22:46" (3/3) ... [2023-11-23 21:22:46,376 INFO L112 eAbstractionObserver]: Analyzing ICFG transmitter.07.cil.c [2023-11-23 21:22:46,396 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:22:46,396 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:22:46,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:22:46,468 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;@3998c462, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:22:46,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:22:46,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:22:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:46,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:46,493 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, 1, 1, 1, 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 21:22:46,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:46,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1172990225, now seen corresponding path program 1 times [2023-11-23 21:22:46,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:46,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481846914] [2023-11-23 21:22:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:46,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:47,069 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 21:22:47,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:47,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481846914] [2023-11-23 21:22:47,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481846914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:47,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:47,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:22:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460415550] [2023-11-23 21:22:47,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:47,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:22:47,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:22:47,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:22:47,114 INFO L87 Difference]: Start difference. First operand has 139 states, 111 states have (on average 1.5045045045045045) internal successors, (167), 113 states have internal predecessors, (167), 20 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-23 21:22:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:47,604 INFO L93 Difference]: Finished difference Result 404 states and 611 transitions. [2023-11-23 21:22:47,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:22:47,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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 57 [2023-11-23 21:22:47,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:47,627 INFO L225 Difference]: With dead ends: 404 [2023-11-23 21:22:47,628 INFO L226 Difference]: Without dead ends: 266 [2023-11-23 21:22:47,637 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 21:22:47,643 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 358 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:47,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 554 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:22:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-11-23 21:22:47,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 262. [2023-11-23 21:22:47,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 213 states have (on average 1.4507042253521127) internal successors, (309), 215 states have internal predecessors, (309), 36 states have call successors, (36), 12 states have call predecessors, (36), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-23 21:22:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 381 transitions. [2023-11-23 21:22:47,731 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 381 transitions. Word has length 57 [2023-11-23 21:22:47,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:47,732 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 381 transitions. [2023-11-23 21:22:47,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2023-11-23 21:22:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 381 transitions. [2023-11-23 21:22:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:47,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:47,736 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, 1, 1, 1, 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 21:22:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:22:47,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:47,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1228534896, now seen corresponding path program 1 times [2023-11-23 21:22:47,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:47,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363791225] [2023-11-23 21:22:47,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:47,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:47,924 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 21:22:47,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:47,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363791225] [2023-11-23 21:22:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363791225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:47,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550573189] [2023-11-23 21:22:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:47,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:47,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:47,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:47,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:47,928 INFO L87 Difference]: Start difference. First operand 262 states and 381 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:48,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:48,688 INFO L93 Difference]: Finished difference Result 1513 states and 2309 transitions. [2023-11-23 21:22:48,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:48,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2023-11-23 21:22:48,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:48,703 INFO L225 Difference]: With dead ends: 1513 [2023-11-23 21:22:48,703 INFO L226 Difference]: Without dead ends: 1256 [2023-11-23 21:22:48,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:48,708 INFO L413 NwaCegarLoop]: 380 mSDtfsCounter, 808 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:48,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [817 Valid, 829 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:22:48,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2023-11-23 21:22:48,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1220. [2023-11-23 21:22:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1007 states have (on average 1.4428997020854022) internal successors, (1453), 1015 states have internal predecessors, (1453), 152 states have call successors, (152), 60 states have call predecessors, (152), 60 states have return successors, (226), 145 states have call predecessors, (226), 152 states have call successors, (226) [2023-11-23 21:22:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1831 transitions. [2023-11-23 21:22:48,848 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1831 transitions. Word has length 57 [2023-11-23 21:22:48,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:48,849 INFO L495 AbstractCegarLoop]: Abstraction has 1220 states and 1831 transitions. [2023-11-23 21:22:48,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:48,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1831 transitions. [2023-11-23 21:22:48,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:48,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:48,854 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, 1, 1, 1, 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 21:22:48,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:22:48,855 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:48,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:48,856 INFO L85 PathProgramCache]: Analyzing trace with hash 743360177, now seen corresponding path program 1 times [2023-11-23 21:22:48,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:48,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318313424] [2023-11-23 21:22:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:48,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:49,039 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 21:22:49,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:49,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318313424] [2023-11-23 21:22:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318313424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:49,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:49,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446491362] [2023-11-23 21:22:49,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:49,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:49,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:49,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:49,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:49,051 INFO L87 Difference]: Start difference. First operand 1220 states and 1831 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:49,857 INFO L93 Difference]: Finished difference Result 4803 states and 7407 transitions. [2023-11-23 21:22:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2023-11-23 21:22:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:49,898 INFO L225 Difference]: With dead ends: 4803 [2023-11-23 21:22:49,899 INFO L226 Difference]: Without dead ends: 3588 [2023-11-23 21:22:49,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:49,913 INFO L413 NwaCegarLoop]: 398 mSDtfsCounter, 811 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:49,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 832 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:22:49,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2023-11-23 21:22:50,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 3334. [2023-11-23 21:22:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3334 states, 2815 states have (on average 1.4525754884547069) internal successors, (4089), 2797 states have internal predecessors, (4089), 354 states have call successors, (354), 148 states have call predecessors, (354), 164 states have return successors, (668), 389 states have call predecessors, (668), 354 states have call successors, (668) [2023-11-23 21:22:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3334 states to 3334 states and 5111 transitions. [2023-11-23 21:22:50,181 INFO L78 Accepts]: Start accepts. Automaton has 3334 states and 5111 transitions. Word has length 57 [2023-11-23 21:22:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:50,181 INFO L495 AbstractCegarLoop]: Abstraction has 3334 states and 5111 transitions. [2023-11-23 21:22:50,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3334 states and 5111 transitions. [2023-11-23 21:22:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:50,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:50,184 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, 1, 1, 1, 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 21:22:50,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:22:50,184 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:50,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:50,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1266680848, now seen corresponding path program 1 times [2023-11-23 21:22:50,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:50,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328403316] [2023-11-23 21:22:50,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:50,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:50,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:50,305 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 21:22:50,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:50,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328403316] [2023-11-23 21:22:50,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328403316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:50,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:50,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:50,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016420546] [2023-11-23 21:22:50,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:50,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:50,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:50,309 INFO L87 Difference]: Start difference. First operand 3334 states and 5111 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:51,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:51,362 INFO L93 Difference]: Finished difference Result 12271 states and 19429 transitions. [2023-11-23 21:22:51,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:51,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2023-11-23 21:22:51,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:51,444 INFO L225 Difference]: With dead ends: 12271 [2023-11-23 21:22:51,445 INFO L226 Difference]: Without dead ends: 8942 [2023-11-23 21:22:51,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:51,469 INFO L413 NwaCegarLoop]: 399 mSDtfsCounter, 807 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:51,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:22:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8942 states. [2023-11-23 21:22:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8942 to 8374. [2023-11-23 21:22:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8374 states, 7153 states have (on average 1.4607856843282538) internal successors, (10449), 7053 states have internal predecessors, (10449), 800 states have call successors, (800), 348 states have call predecessors, (800), 420 states have return successors, (1868), 973 states have call predecessors, (1868), 800 states have call successors, (1868) [2023-11-23 21:22:52,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8374 states to 8374 states and 13117 transitions. [2023-11-23 21:22:52,236 INFO L78 Accepts]: Start accepts. Automaton has 8374 states and 13117 transitions. Word has length 57 [2023-11-23 21:22:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:52,238 INFO L495 AbstractCegarLoop]: Abstraction has 8374 states and 13117 transitions. [2023-11-23 21:22:52,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8374 states and 13117 transitions. [2023-11-23 21:22:52,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-23 21:22:52,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:52,242 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, 1, 1, 1, 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 21:22:52,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:22:52,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:52,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash -2109311825, now seen corresponding path program 1 times [2023-11-23 21:22:52,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:52,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810294175] [2023-11-23 21:22:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:52,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:52,433 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 21:22:52,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:52,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810294175] [2023-11-23 21:22:52,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810294175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:52,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:52,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:22:52,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771904265] [2023-11-23 21:22:52,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:52,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:22:52,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:52,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:22:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:22:52,439 INFO L87 Difference]: Start difference. First operand 8374 states and 13117 transitions. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:54,202 INFO L93 Difference]: Finished difference Result 30337 states and 49686 transitions. [2023-11-23 21:22:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:22:54,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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 57 [2023-11-23 21:22:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:54,434 INFO L225 Difference]: With dead ends: 30337 [2023-11-23 21:22:54,434 INFO L226 Difference]: Without dead ends: 21968 [2023-11-23 21:22:54,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:22:54,484 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 804 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:54,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [812 Valid, 832 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:22:54,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21968 states. [2023-11-23 21:22:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21968 to 20654. [2023-11-23 21:22:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20654 states, 17721 states have (on average 1.462840697477569) internal successors, (25923), 17279 states have internal predecessors, (25923), 1856 states have call successors, (1856), 820 states have call predecessors, (1856), 1076 states have return successors, (5404), 2555 states have call predecessors, (5404), 1856 states have call successors, (5404) [2023-11-23 21:22:56,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20654 states to 20654 states and 33183 transitions. [2023-11-23 21:22:56,182 INFO L78 Accepts]: Start accepts. Automaton has 20654 states and 33183 transitions. Word has length 57 [2023-11-23 21:22:56,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:22:56,183 INFO L495 AbstractCegarLoop]: Abstraction has 20654 states and 33183 transitions. [2023-11-23 21:22:56,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 states have internal predecessors, (47), 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) [2023-11-23 21:22:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 20654 states and 33183 transitions. [2023-11-23 21:22:56,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-23 21:22:56,188 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:22:56,188 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, 1, 1, 1, 1, 1, 1, 1, 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 21:22:56,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:22:56,189 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:22:56,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:22:56,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1711080414, now seen corresponding path program 1 times [2023-11-23 21:22:56,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:22:56,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401081553] [2023-11-23 21:22:56,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:22:56,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:22:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:22:56,456 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 21:22:56,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:22:56,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401081553] [2023-11-23 21:22:56,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401081553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:22:56,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:22:56,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:22:56,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977128271] [2023-11-23 21:22:56,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:22:56,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:22:56,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:22:56,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:22:56,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:22:56,460 INFO L87 Difference]: Start difference. First operand 20654 states and 33183 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:22:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:22:58,783 INFO L93 Difference]: Finished difference Result 55804 states and 90189 transitions. [2023-11-23 21:22:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:22:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 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 61 [2023-11-23 21:22:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:22:58,963 INFO L225 Difference]: With dead ends: 55804 [2023-11-23 21:22:58,964 INFO L226 Difference]: Without dead ends: 35156 [2023-11-23 21:22:59,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:22:59,024 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 568 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:22:59,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 536 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:22:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35156 states. [2023-11-23 21:23:01,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35156 to 32883. [2023-11-23 21:23:01,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32883 states, 28264 states have (on average 1.448804132465327) internal successors, (40949), 27673 states have internal predecessors, (40949), 2782 states have call successors, (2782), 1324 states have call predecessors, (2782), 1836 states have return successors, (8104), 3886 states have call predecessors, (8104), 2782 states have call successors, (8104) [2023-11-23 21:23:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32883 states to 32883 states and 51835 transitions. [2023-11-23 21:23:01,942 INFO L78 Accepts]: Start accepts. Automaton has 32883 states and 51835 transitions. Word has length 61 [2023-11-23 21:23:01,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:01,945 INFO L495 AbstractCegarLoop]: Abstraction has 32883 states and 51835 transitions. [2023-11-23 21:23:01,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 6 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:23:01,946 INFO L276 IsEmpty]: Start isEmpty. Operand 32883 states and 51835 transitions. [2023-11-23 21:23:01,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-23 21:23:01,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:01,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:01,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:23:01,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:01,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:01,949 INFO L85 PathProgramCache]: Analyzing trace with hash 29338996, now seen corresponding path program 1 times [2023-11-23 21:23:01,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:01,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171678415] [2023-11-23 21:23:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:01,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:02,345 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 21:23:02,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:02,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171678415] [2023-11-23 21:23:02,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171678415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:02,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:02,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:02,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156492996] [2023-11-23 21:23:02,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:02,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:02,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:02,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:02,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:02,348 INFO L87 Difference]: Start difference. First operand 32883 states and 51835 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:23:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:04,862 INFO L93 Difference]: Finished difference Result 87477 states and 140329 transitions. [2023-11-23 21:23:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:23:04,862 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 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 63 [2023-11-23 21:23:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:05,192 INFO L225 Difference]: With dead ends: 87477 [2023-11-23 21:23:05,192 INFO L226 Difference]: Without dead ends: 54600 [2023-11-23 21:23:05,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:23:05,280 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 495 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:05,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 519 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:23:05,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54600 states. [2023-11-23 21:23:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54600 to 51534. [2023-11-23 21:23:09,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51534 states, 44373 states have (on average 1.4455186712640569) internal successors, (64142), 43675 states have internal predecessors, (64142), 4360 states have call successors, (4360), 2136 states have call predecessors, (4360), 2800 states have return successors, (12931), 5723 states have call predecessors, (12931), 4360 states have call successors, (12931) [2023-11-23 21:23:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51534 states to 51534 states and 81433 transitions. [2023-11-23 21:23:09,655 INFO L78 Accepts]: Start accepts. Automaton has 51534 states and 81433 transitions. Word has length 63 [2023-11-23 21:23:09,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:09,656 INFO L495 AbstractCegarLoop]: Abstraction has 51534 states and 81433 transitions. [2023-11-23 21:23:09,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:23:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 51534 states and 81433 transitions. [2023-11-23 21:23:09,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-23 21:23:09,659 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:09,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:09,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 21:23:09,660 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:09,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:09,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1652007783, now seen corresponding path program 1 times [2023-11-23 21:23:09,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:09,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740957940] [2023-11-23 21:23:09,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:09,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:09,994 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 21:23:09,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:09,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740957940] [2023-11-23 21:23:09,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740957940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:09,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:09,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:09,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149350705] [2023-11-23 21:23:09,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:09,998 INFO L87 Difference]: Start difference. First operand 51534 states and 81433 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:23:14,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:23:14,541 INFO L93 Difference]: Finished difference Result 137846 states and 221916 transitions. [2023-11-23 21:23:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 21:23:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 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 65 [2023-11-23 21:23:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:23:15,106 INFO L225 Difference]: With dead ends: 137846 [2023-11-23 21:23:15,106 INFO L226 Difference]: Without dead ends: 86318 [2023-11-23 21:23:15,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:23:15,233 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 525 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:23:15,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 542 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:23:15,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86318 states. [2023-11-23 21:23:20,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86318 to 82180. [2023-11-23 21:23:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82180 states, 70837 states have (on average 1.4391772661179891) internal successors, (101947), 70037 states have internal predecessors, (101947), 6970 states have call successors, (6970), 3516 states have call predecessors, (6970), 4372 states have return successors, (21046), 8627 states have call predecessors, (21046), 6970 states have call successors, (21046) [2023-11-23 21:23:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82180 states to 82180 states and 129963 transitions. [2023-11-23 21:23:20,906 INFO L78 Accepts]: Start accepts. Automaton has 82180 states and 129963 transitions. Word has length 65 [2023-11-23 21:23:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:23:20,907 INFO L495 AbstractCegarLoop]: Abstraction has 82180 states and 129963 transitions. [2023-11-23 21:23:20,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:23:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 82180 states and 129963 transitions. [2023-11-23 21:23:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-23 21:23:20,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:23:20,909 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:23:20,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 21:23:20,910 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:23:20,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:23:20,910 INFO L85 PathProgramCache]: Analyzing trace with hash 877780468, now seen corresponding path program 1 times [2023-11-23 21:23:20,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:23:20,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511354500] [2023-11-23 21:23:20,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:23:20,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:23:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:23:21,141 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 21:23:21,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:23:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511354500] [2023-11-23 21:23:21,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511354500] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:23:21,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:23:21,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 21:23:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617957199] [2023-11-23 21:23:21,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:23:21,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:23:21,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:23:21,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:23:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:23:21,146 INFO L87 Difference]: Start difference. First operand 82180 states and 129963 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5)