./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ --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 b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:11:13,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:11:13,798 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:11:13,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:11:13,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:11:13,867 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:11:13,868 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:11:13,869 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:11:13,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:11:13,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:11:13,877 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:11:13,879 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:11:13,879 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:11:13,882 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:11:13,882 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:11:13,883 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:11:13,884 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:11:13,884 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:11:13,885 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:11:13,886 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:11:13,886 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:11:13,887 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:11:13,889 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:11:13,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:11:13,890 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:11:13,891 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:11:13,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:11:13,892 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:11:13,905 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:11:13,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:11:13,907 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:11:13,908 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:11:13,908 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:11:13,908 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:11:13,909 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:11:13,909 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:11:13,910 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:13,910 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:11:13,911 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:11:13,911 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:11:13,911 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:11:13,912 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:11:13,912 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:11:13,913 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:11:13,914 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:11:13,914 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_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 [2023-11-19 04:11:14,292 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:11:14,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:11:14,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:11:14,366 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:11:14,366 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:11:14,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-19 04:11:17,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:11:18,318 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:11:18,333 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-19 04:11:18,394 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/data/03ec259b6/76c1b0cf87e14ec7a9f2eb170c93e7ea/FLAG8b630532f [2023-11-19 04:11:18,410 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/data/03ec259b6/76c1b0cf87e14ec7a9f2eb170c93e7ea [2023-11-19 04:11:18,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:11:18,414 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:11:18,416 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:18,416 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:11:18,422 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:11:18,423 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:18" (1/1) ... [2023-11-19 04:11:18,424 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fbec516 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:18, skipping insertion in model container [2023-11-19 04:11:18,425 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:18" (1/1) ... [2023-11-19 04:11:18,499 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:11:18,717 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_9c2efad4-5dc8-4803-b67f-d5212cf834c6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2023-11-19 04:11:18,796 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_9c2efad4-5dc8-4803-b67f-d5212cf834c6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2023-11-19 04:11:18,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:18,949 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:11:18,963 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_9c2efad4-5dc8-4803-b67f-d5212cf834c6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2023-11-19 04:11:18,978 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_9c2efad4-5dc8-4803-b67f-d5212cf834c6/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2023-11-19 04:11:19,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:11:19,079 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:11:19,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19 WrapperNode [2023-11-19 04:11:19,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:11:19,082 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:19,082 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:11:19,082 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:11:19,090 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,214 INFO L138 Inliner]: procedures = 74, calls = 87, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1145 [2023-11-19 04:11:19,214 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:11:19,215 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:11:19,215 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:11:19,215 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:11:19,226 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,238 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,303 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,307 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:11:19,323 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:11:19,323 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:11:19,323 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:11:19,324 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (1/1) ... [2023-11-19 04:11:19,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:11:19,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:19,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:11:19,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:11:19,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:11:19,415 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-19 04:11:19,415 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-19 04:11:19,416 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2023-11-19 04:11:19,417 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2023-11-19 04:11:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-19 04:11:19,417 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-19 04:11:19,417 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-19 04:11:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-19 04:11:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-19 04:11:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-19 04:11:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-19 04:11:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-19 04:11:19,418 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-19 04:11:19,418 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-19 04:11:19,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:11:19,419 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-19 04:11:19,419 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-19 04:11:19,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:11:19,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:11:19,420 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-19 04:11:19,421 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-19 04:11:19,613 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:11:19,615 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:11:20,919 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:11:21,885 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:11:21,886 INFO L302 CfgBuilder]: Removed 20 assume(true) statements. [2023-11-19 04:11:21,905 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:21 BoogieIcfgContainer [2023-11-19 04:11:21,905 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:11:21,910 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:11:21,910 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:11:21,914 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:11:21,915 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:11:18" (1/3) ... [2023-11-19 04:11:21,916 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47851bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:21, skipping insertion in model container [2023-11-19 04:11:21,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:19" (2/3) ... [2023-11-19 04:11:21,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47851bd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:21, skipping insertion in model container [2023-11-19 04:11:21,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:21" (3/3) ... [2023-11-19 04:11:21,920 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2023-11-19 04:11:21,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:11:21,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-19 04:11:22,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:11:22,031 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;@36a79c5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:11:22,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-19 04:11:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-11-19 04:11:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:11:22,056 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:22,057 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] [2023-11-19 04:11:22,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:22,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1186220028, now seen corresponding path program 1 times [2023-11-19 04:11:22,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:22,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905602784] [2023-11-19 04:11:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:22,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:22,515 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905602784] [2023-11-19 04:11:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905602784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:22,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:22,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:22,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160491776] [2023-11-19 04:11:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:22,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:22,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:22,570 INFO L87 Difference]: Start difference. First operand has 264 states, 219 states have (on average 1.5296803652968036) internal successors, (335), 224 states have internal predecessors, (335), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) 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) [2023-11-19 04:11:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:22,839 INFO L93 Difference]: Finished difference Result 561 states and 850 transitions. [2023-11-19 04:11:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:22,842 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 [2023-11-19 04:11:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:22,858 INFO L225 Difference]: With dead ends: 561 [2023-11-19 04:11:22,859 INFO L226 Difference]: Without dead ends: 297 [2023-11-19 04:11:22,866 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 [2023-11-19 04:11:22,870 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 368 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:22,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 394 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:11:22,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-19 04:11:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2023-11-19 04:11:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 245 states have (on average 1.4775510204081632) internal successors, (362), 248 states have internal predecessors, (362), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:11:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 432 transitions. [2023-11-19 04:11:22,995 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 432 transitions. Word has length 28 [2023-11-19 04:11:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:22,997 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 432 transitions. [2023-11-19 04:11:22,997 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) [2023-11-19 04:11:22,998 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 432 transitions. [2023-11-19 04:11:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 04:11:23,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,002 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] [2023-11-19 04:11:23,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:11:23,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:23,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1409672518, now seen corresponding path program 1 times [2023-11-19 04:11:23,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888003244] [2023-11-19 04:11:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888003244] [2023-11-19 04:11:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888003244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:23,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:23,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:23,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434446887] [2023-11-19 04:11:23,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:23,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:23,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:23,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:23,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:23,137 INFO L87 Difference]: Start difference. First operand 293 states and 432 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) [2023-11-19 04:11:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:23,301 INFO L93 Difference]: Finished difference Result 449 states and 649 transitions. [2023-11-19 04:11:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:23,302 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 [2023-11-19 04:11:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:23,307 INFO L225 Difference]: With dead ends: 449 [2023-11-19 04:11:23,308 INFO L226 Difference]: Without dead ends: 368 [2023-11-19 04:11:23,309 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 [2023-11-19 04:11:23,311 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 366 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:23,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 378 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:11:23,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2023-11-19 04:11:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 364. [2023-11-19 04:11:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 305 states have (on average 1.4524590163934425) internal successors, (443), 308 states have internal predecessors, (443), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-19 04:11:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 527 transitions. [2023-11-19 04:11:23,401 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 527 transitions. Word has length 29 [2023-11-19 04:11:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:23,402 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 527 transitions. [2023-11-19 04:11:23,402 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) [2023-11-19 04:11:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 527 transitions. [2023-11-19 04:11:23,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 04:11:23,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,412 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] [2023-11-19 04:11:23,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:11:23,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:23,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1595739023, now seen corresponding path program 1 times [2023-11-19 04:11:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215144013] [2023-11-19 04:11:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:23,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215144013] [2023-11-19 04:11:23,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215144013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:23,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:23,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125156173] [2023-11-19 04:11:23,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:23,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:23,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:23,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:23,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:23,542 INFO L87 Difference]: Start difference. First operand 364 states and 527 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) [2023-11-19 04:11:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:23,748 INFO L93 Difference]: Finished difference Result 604 states and 855 transitions. [2023-11-19 04:11:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:23,749 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 [2023-11-19 04:11:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:23,754 INFO L225 Difference]: With dead ends: 604 [2023-11-19 04:11:23,754 INFO L226 Difference]: Without dead ends: 452 [2023-11-19 04:11:23,755 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 [2023-11-19 04:11:23,757 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 46 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:23,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 647 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:11:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-11-19 04:11:23,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2023-11-19 04:11:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 368 states have (on average 1.434782608695652) internal successors, (528), 373 states have internal predecessors, (528), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-19 04:11:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 624 transitions. [2023-11-19 04:11:23,797 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 624 transitions. Word has length 30 [2023-11-19 04:11:23,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:23,797 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 624 transitions. [2023-11-19 04:11:23,797 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) [2023-11-19 04:11:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 624 transitions. [2023-11-19 04:11:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 04:11:23,800 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:23,800 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] [2023-11-19 04:11:23,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:11:23,801 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:23,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1719541363, now seen corresponding path program 1 times [2023-11-19 04:11:23,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:23,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370442870] [2023-11-19 04:11:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:23,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:11:23,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:23,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370442870] [2023-11-19 04:11:23,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370442870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:23,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:23,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:23,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835262497] [2023-11-19 04:11:23,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:23,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:23,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:23,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:23,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:23,920 INFO L87 Difference]: Start difference. First operand 438 states and 624 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) [2023-11-19 04:11:24,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:24,140 INFO L93 Difference]: Finished difference Result 601 states and 842 transitions. [2023-11-19 04:11:24,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:24,141 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 [2023-11-19 04:11:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:24,147 INFO L225 Difference]: With dead ends: 601 [2023-11-19 04:11:24,147 INFO L226 Difference]: Without dead ends: 443 [2023-11-19 04:11:24,148 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 [2023-11-19 04:11:24,150 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 32 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:24,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 681 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:11:24,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-19 04:11:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 432. [2023-11-19 04:11:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 362 states have (on average 1.419889502762431) internal successors, (514), 367 states have internal predecessors, (514), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2023-11-19 04:11:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 610 transitions. [2023-11-19 04:11:24,188 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 610 transitions. Word has length 43 [2023-11-19 04:11:24,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:24,189 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 610 transitions. [2023-11-19 04:11:24,189 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) [2023-11-19 04:11:24,189 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 610 transitions. [2023-11-19 04:11:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 04:11:24,192 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:24,192 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] [2023-11-19 04:11:24,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:11:24,192 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:24,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -668060368, now seen corresponding path program 1 times [2023-11-19 04:11:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129356331] [2023-11-19 04:11:24,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 04:11:24,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:24,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129356331] [2023-11-19 04:11:24,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129356331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:24,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:24,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:11:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366164179] [2023-11-19 04:11:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 04:11:24,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 04:11:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 04:11:24,265 INFO L87 Difference]: Start difference. First operand 432 states and 610 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) [2023-11-19 04:11:24,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:24,504 INFO L93 Difference]: Finished difference Result 681 states and 934 transitions. [2023-11-19 04:11:24,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 04:11:24,505 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 [2023-11-19 04:11:24,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:24,513 INFO L225 Difference]: With dead ends: 681 [2023-11-19 04:11:24,513 INFO L226 Difference]: Without dead ends: 478 [2023-11-19 04:11:24,514 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 [2023-11-19 04:11:24,521 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 352 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:24,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 377 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:11:24,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2023-11-19 04:11:24,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2023-11-19 04:11:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 401 states have (on average 1.3890274314214464) internal successors, (557), 406 states have internal predecessors, (557), 53 states have call successors, (53), 23 states have call predecessors, (53), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 04:11:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 661 transitions. [2023-11-19 04:11:24,579 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 661 transitions. Word has length 46 [2023-11-19 04:11:24,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:24,579 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 661 transitions. [2023-11-19 04:11:24,579 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) [2023-11-19 04:11:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 661 transitions. [2023-11-19 04:11:24,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-19 04:11:24,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:24,582 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] [2023-11-19 04:11:24,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:11:24,582 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:24,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:24,583 INFO L85 PathProgramCache]: Analyzing trace with hash -414939228, now seen corresponding path program 1 times [2023-11-19 04:11:24,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:24,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338347446] [2023-11-19 04:11:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:24,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:11:24,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338347446] [2023-11-19 04:11:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338347446] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:24,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:11:24,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:11:24,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733055096] [2023-11-19 04:11:24,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:24,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:11:24,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:24,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:11:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:11:24,701 INFO L87 Difference]: Start difference. First operand 478 states and 661 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) [2023-11-19 04:11:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:25,113 INFO L93 Difference]: Finished difference Result 518 states and 708 transitions. [2023-11-19 04:11:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:11:25,114 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 [2023-11-19 04:11:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:25,119 INFO L225 Difference]: With dead ends: 518 [2023-11-19 04:11:25,119 INFO L226 Difference]: Without dead ends: 515 [2023-11-19 04:11:25,120 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 [2023-11-19 04:11:25,121 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 644 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:25,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [644 Valid, 376 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:11:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-11-19 04:11:25,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 477. [2023-11-19 04:11:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 401 states have (on average 1.3840399002493766) internal successors, (555), 405 states have internal predecessors, (555), 52 states have call successors, (52), 23 states have call predecessors, (52), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-19 04:11:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 658 transitions. [2023-11-19 04:11:25,176 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 658 transitions. Word has length 47 [2023-11-19 04:11:25,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:25,176 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 658 transitions. [2023-11-19 04:11:25,177 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) [2023-11-19 04:11:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 658 transitions. [2023-11-19 04:11:25,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 04:11:25,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:25,179 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] [2023-11-19 04:11:25,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:11:25,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:25,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 20305843, now seen corresponding path program 1 times [2023-11-19 04:11:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:25,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115221230] [2023-11-19 04:11:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:11:25,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:25,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115221230] [2023-11-19 04:11:25,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115221230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:25,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860871601] [2023-11-19 04:11:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:25,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:25,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:25,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:25,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c2efad4-5dc8-4803-b67f-d5212cf834c6/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:11:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:25,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 04:11:25,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:25,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:11:26,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860871601] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:26,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2145595958] [2023-11-19 04:11:26,142 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2023-11-19 04:11:26,143 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:26,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:11:26,154 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:11:26,155 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:11:39,344 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 199 for LOIs [2023-11-19 04:11:39,449 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 216 for LOIs [2023-11-19 04:11:39,595 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 262 for LOIs [2023-11-19 04:11:46,814 INFO L180 IcfgInterpreter]: Interpretation finished