./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/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 cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:23:54,376 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:23:54,447 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:23:54,453 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:23:54,454 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:23:54,493 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:23:54,496 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:23:54,497 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:23:54,498 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:23:54,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:23:54,501 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:23:54,502 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:23:54,503 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:23:54,508 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:23:54,508 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:23:54,509 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:23:54,510 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:23:54,511 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:23:54,511 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:23:54,512 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:23:54,512 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:23:54,513 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:23:54,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:23:54,515 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:23:54,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:23:54,516 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:23:54,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:23:54,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:23:54,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:23:54,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:23:54,519 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:23:54,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:23:54,519 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:23:54,520 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:23:54,520 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:23:54,520 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:23:54,521 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:23:54,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:54,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:23:54,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:23:54,522 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:23:54,522 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:23:54,522 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:23:54,523 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:23:54,523 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:23:54,523 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:23:54,524 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:23:54,525 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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb07c62e0c8f9c002ab72b797de071664dce20871b109c1b4c0b79acbb73493c [2023-11-23 21:23:54,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:23:54,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:23:54,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:23:54,918 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:23:54,918 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:23:54,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2023-11-23 21:23:58,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:23:58,409 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:23:58,427 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2023-11-23 21:23:58,457 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/data/3ccdf057b/49335013b28847c7805138b0995efa2f/FLAGb2becdfe4 [2023-11-23 21:23:58,478 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/data/3ccdf057b/49335013b28847c7805138b0995efa2f [2023-11-23 21:23:58,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:23:58,488 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:23:58,493 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:58,493 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:23:58,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:23:58,502 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:58" (1/1) ... [2023-11-23 21:23:58,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@307d63bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:58, skipping insertion in model container [2023-11-23 21:23:58,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:23:58" (1/1) ... [2023-11-23 21:23:58,588 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:23:58,767 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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2023-11-23 21:23:58,822 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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2023-11-23 21:23:58,962 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:58,993 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:23:59,015 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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[913,926] [2023-11-23 21:23:59,038 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_c7cd373a-0a15-4a9d-b902-ec45baf095c3/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.12.cil-2.c[5977,5990] [2023-11-23 21:23:59,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:23:59,159 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:23:59,159 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59 WrapperNode [2023-11-23 21:23:59,160 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:23:59,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:59,161 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:23:59,161 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:23:59,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,186 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,244 INFO L138 Inliner]: procedures = 72, calls = 84, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1085 [2023-11-23 21:23:59,244 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:23:59,245 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:23:59,245 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:23:59,246 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:23:59,257 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,268 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,275 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,287 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,360 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,387 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:23:59,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:23:59,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:23:59,403 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:23:59,404 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (1/1) ... [2023-11-23 21:23:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:23:59,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:23:59,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:23:59,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:23:59,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:23:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:23:59,507 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:23:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-23 21:23:59,507 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-23 21:23:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:23:59,508 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:23:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:23:59,508 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:23:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:23:59,508 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:23:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:23:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:23:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:23:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:23:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:23:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:23:59,512 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:23:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:23:59,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:23:59,513 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:23:59,513 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:23:59,694 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:23:59,696 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:24:00,784 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:24:01,426 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:24:01,427 INFO L309 CfgBuilder]: Removed 19 assume(true) statements. [2023-11-23 21:24:01,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:01 BoogieIcfgContainer [2023-11-23 21:24:01,428 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:24:01,431 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:24:01,431 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:24:01,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:24:01,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:23:58" (1/3) ... [2023-11-23 21:24:01,435 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8c4556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:01, skipping insertion in model container [2023-11-23 21:24:01,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:23:59" (2/3) ... [2023-11-23 21:24:01,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e8c4556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:01, skipping insertion in model container [2023-11-23 21:24:01,436 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:01" (3/3) ... [2023-11-23 21:24:01,437 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.12.cil-2.c [2023-11-23 21:24:01,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:24:01,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:24:01,512 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:24:01,519 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;@1ff1af06, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:24:01,519 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:24:01,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 252 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 213 states have internal predecessors, (318), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2023-11-23 21:24:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:24:01,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:01,537 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 21:24:01,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:01,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:01,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1846605406, now seen corresponding path program 1 times [2023-11-23 21:24:01,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808947980] [2023-11-23 21:24:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:01,952 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 21:24:01,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808947980] [2023-11-23 21:24:01,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808947980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:01,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:01,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:01,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643479815] [2023-11-23 21:24:01,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:01,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:01,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:02,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:02,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:02,017 INFO L87 Difference]: Start difference. First operand has 252 states, 208 states have (on average 1.5288461538461537) internal successors, (318), 213 states have internal predecessors, (318), 32 states have call successors, (32), 9 states have call predecessors, (32), 9 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) 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 21:24:02,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:02,364 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2023-11-23 21:24:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:02,368 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 21:24:02,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:02,381 INFO L225 Difference]: With dead ends: 537 [2023-11-23 21:24:02,382 INFO L226 Difference]: Without dead ends: 285 [2023-11-23 21:24:02,388 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 21:24:02,392 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 349 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:02,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 378 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-23 21:24:02,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 281. [2023-11-23 21:24:02,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 234 states have (on average 1.4743589743589745) internal successors, (345), 237 states have internal predecessors, (345), 35 states have call successors, (35), 11 states have call predecessors, (35), 10 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-23 21:24:02,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 413 transitions. [2023-11-23 21:24:02,466 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 413 transitions. Word has length 28 [2023-11-23 21:24:02,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:02,467 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 413 transitions. [2023-11-23 21:24:02,467 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 21:24:02,467 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 413 transitions. [2023-11-23 21:24:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 21:24:02,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:02,470 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 21:24:02,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:24:02,471 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:02,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:02,472 INFO L85 PathProgramCache]: Analyzing trace with hash 112349295, now seen corresponding path program 1 times [2023-11-23 21:24:02,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480974854] [2023-11-23 21:24:02,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:02,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:02,546 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 21:24:02,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:02,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480974854] [2023-11-23 21:24:02,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480974854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:02,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:02,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:02,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575776108] [2023-11-23 21:24:02,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:02,551 INFO L87 Difference]: Start difference. First operand 281 states and 413 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 21:24:02,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:02,725 INFO L93 Difference]: Finished difference Result 437 states and 630 transitions. [2023-11-23 21:24:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:02,725 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 21:24:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:02,733 INFO L225 Difference]: With dead ends: 437 [2023-11-23 21:24:02,734 INFO L226 Difference]: Without dead ends: 356 [2023-11-23 21:24:02,738 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 21:24:02,740 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 347 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:02,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 362 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2023-11-23 21:24:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2023-11-23 21:24:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 294 states have (on average 1.4489795918367347) internal successors, (426), 297 states have internal predecessors, (426), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-11-23 21:24:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 508 transitions. [2023-11-23 21:24:02,811 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 508 transitions. Word has length 29 [2023-11-23 21:24:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:02,812 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 508 transitions. [2023-11-23 21:24:02,813 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 21:24:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 508 transitions. [2023-11-23 21:24:02,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:24:02,822 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:02,822 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 21:24:02,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:24:02,823 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:02,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1595667963, now seen corresponding path program 1 times [2023-11-23 21:24:02,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:02,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075810332] [2023-11-23 21:24:02,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:02,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:02,907 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 21:24:02,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:02,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075810332] [2023-11-23 21:24:02,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075810332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:02,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:02,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270971636] [2023-11-23 21:24:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:02,919 INFO L87 Difference]: Start difference. First operand 352 states and 508 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 21:24:03,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:03,119 INFO L93 Difference]: Finished difference Result 592 states and 836 transitions. [2023-11-23 21:24:03,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:03,120 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 21:24:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:03,124 INFO L225 Difference]: With dead ends: 592 [2023-11-23 21:24:03,124 INFO L226 Difference]: Without dead ends: 440 [2023-11-23 21:24:03,130 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 21:24:03,134 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 46 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:03,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 615 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:03,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2023-11-23 21:24:03,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2023-11-23 21:24:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 357 states have (on average 1.4313725490196079) internal successors, (511), 362 states have internal predecessors, (511), 48 states have call successors, (48), 20 states have call predecessors, (48), 19 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-23 21:24:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 605 transitions. [2023-11-23 21:24:03,190 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 605 transitions. Word has length 30 [2023-11-23 21:24:03,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:03,191 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 605 transitions. [2023-11-23 21:24:03,191 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 21:24:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 605 transitions. [2023-11-23 21:24:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:24:03,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:03,199 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 21:24:03,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:24:03,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:03,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1505134718, now seen corresponding path program 1 times [2023-11-23 21:24:03,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:03,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23969153] [2023-11-23 21:24:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:03,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:03,322 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 21:24:03,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:03,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23969153] [2023-11-23 21:24:03,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23969153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:03,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:03,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:03,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639984965] [2023-11-23 21:24:03,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:03,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:03,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:03,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:03,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:03,325 INFO L87 Difference]: Start difference. First operand 426 states and 605 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 21:24:03,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:03,495 INFO L93 Difference]: Finished difference Result 589 states and 823 transitions. [2023-11-23 21:24:03,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:03,496 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 21:24:03,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:03,501 INFO L225 Difference]: With dead ends: 589 [2023-11-23 21:24:03,501 INFO L226 Difference]: Without dead ends: 431 [2023-11-23 21:24:03,502 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 21:24:03,503 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 32 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:03,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 649 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-23 21:24:03,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 420. [2023-11-23 21:24:03,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 351 states have (on average 1.415954415954416) internal successors, (497), 356 states have internal predecessors, (497), 48 states have call successors, (48), 20 states have call predecessors, (48), 19 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2023-11-23 21:24:03,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 591 transitions. [2023-11-23 21:24:03,534 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 591 transitions. Word has length 43 [2023-11-23 21:24:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:03,535 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 591 transitions. [2023-11-23 21:24:03,535 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 21:24:03,535 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 591 transitions. [2023-11-23 21:24:03,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:24:03,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:03,537 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 21:24:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:24:03,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:03,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1079341326, now seen corresponding path program 1 times [2023-11-23 21:24:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:03,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729206443] [2023-11-23 21:24:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:03,644 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 21:24:03,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:03,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729206443] [2023-11-23 21:24:03,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729206443] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:03,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:03,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:24:03,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975767519] [2023-11-23 21:24:03,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:03,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:24:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:24:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:24:03,650 INFO L87 Difference]: Start difference. First operand 420 states and 591 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 21:24:03,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:03,809 INFO L93 Difference]: Finished difference Result 669 states and 915 transitions. [2023-11-23 21:24:03,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:24:03,810 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 21:24:03,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:03,819 INFO L225 Difference]: With dead ends: 669 [2023-11-23 21:24:03,819 INFO L226 Difference]: Without dead ends: 466 [2023-11-23 21:24:03,820 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 21:24:03,823 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 333 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:03,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 361 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:24:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-11-23 21:24:03,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2023-11-23 21:24:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 390 states have (on average 1.3846153846153846) internal successors, (540), 395 states have internal predecessors, (540), 52 states have call successors, (52), 23 states have call predecessors, (52), 22 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:24:03,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 642 transitions. [2023-11-23 21:24:03,868 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 642 transitions. Word has length 46 [2023-11-23 21:24:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:03,869 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 642 transitions. [2023-11-23 21:24:03,869 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 21:24:03,869 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 642 transitions. [2023-11-23 21:24:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:24:03,872 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:03,872 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 21:24:03,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:24:03,873 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:03,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 471128065, now seen corresponding path program 1 times [2023-11-23 21:24:03,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210704844] [2023-11-23 21:24:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:04,020 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 21:24:04,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:04,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210704844] [2023-11-23 21:24:04,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210704844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:24:04,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:24:04,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:24:04,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588882250] [2023-11-23 21:24:04,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:24:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:24:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:24:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:24:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:24:04,030 INFO L87 Difference]: Start difference. First operand 466 states and 642 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 21:24:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:24:04,326 INFO L93 Difference]: Finished difference Result 506 states and 689 transitions. [2023-11-23 21:24:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:24:04,327 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 21:24:04,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:24:04,334 INFO L225 Difference]: With dead ends: 506 [2023-11-23 21:24:04,334 INFO L226 Difference]: Without dead ends: 503 [2023-11-23 21:24:04,335 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 21:24:04,337 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 610 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:24:04,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 360 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:24:04,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2023-11-23 21:24:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 465. [2023-11-23 21:24:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 390 states have (on average 1.3794871794871795) internal successors, (538), 394 states have internal predecessors, (538), 51 states have call successors, (51), 23 states have call predecessors, (51), 22 states have return successors, (50), 48 states have call predecessors, (50), 50 states have call successors, (50) [2023-11-23 21:24:04,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 639 transitions. [2023-11-23 21:24:04,387 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 639 transitions. Word has length 47 [2023-11-23 21:24:04,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:24:04,388 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 639 transitions. [2023-11-23 21:24:04,388 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 21:24:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 639 transitions. [2023-11-23 21:24:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-23 21:24:04,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:24:04,390 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 21:24:04,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:24:04,391 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:24:04,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:24:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1718662485, now seen corresponding path program 1 times [2023-11-23 21:24:04,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:24:04,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866395657] [2023-11-23 21:24:04,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:04,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:24:04,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:04,542 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 21:24:04,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:24:04,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866395657] [2023-11-23 21:24:04,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866395657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:24:04,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543666112] [2023-11-23 21:24:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:24:04,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:24:04,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:24:04,545 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:24:04,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7cd373a-0a15-4a9d-b902-ec45baf095c3/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:24:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:24:04,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:24:04,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:24:04,996 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 21:24:04,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:24:05,074 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 21:24:05,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543666112] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:24:05,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1609813452] [2023-11-23 21:24:05,099 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-23 21:24:05,100 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:24:05,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:24:05,111 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:24:05,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:24:15,700 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 189 for LOIs [2023-11-23 21:24:15,775 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 206 for LOIs [2023-11-23 21:24:15,881 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 252 for LOIs [2023-11-23 21:24:22,056 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:24:49,548 WARN L293 SmtUtils]: Spent 5.05s on a formula simplification. DAG size of input: 255 DAG size of output: 252 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)