./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.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_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/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_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/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_74b363e5-2cbb-42d1-a113-806a197d2f9d/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 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:12:59,916 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:13:00,065 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:13:00,081 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:13:00,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:13:00,132 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:13:00,134 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:13:00,135 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:13:00,136 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:13:00,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:13:00,143 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:13:00,145 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:13:00,146 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:13:00,148 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:13:00,149 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:13:00,150 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:13:00,150 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:13:00,151 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:13:00,152 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:13:00,152 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:13:00,153 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:13:00,154 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:13:00,155 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:13:00,156 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:13:00,157 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:13:00,157 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:13:00,158 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:13:00,159 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:13:00,160 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:13:00,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:13:00,162 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:13:00,163 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:13:00,163 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:13:00,163 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:13:00,164 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:13:00,164 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:13:00,164 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:13:00,165 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:00,165 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:13:00,166 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:13:00,166 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:13:00,166 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:13:00,167 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:13:00,167 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:13:00,168 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:13:00,168 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:13:00,168 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:13:00,169 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_74b363e5-2cbb-42d1-a113-806a197d2f9d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b411c6ac71505d2c5059a06fd3211eebca89561d9ac8be37f9ecc9ff82a7a16 [2023-11-23 21:13:00,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:13:00,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:13:00,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:13:00,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:13:00,545 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:13:00,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2023-11-23 21:13:04,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:13:04,329 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:13:04,330 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2023-11-23 21:13:04,346 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/data/fcccbd5b5/6351cc955b7c47a698451db9ddf53ef1/FLAG34e3a4360 [2023-11-23 21:13:04,361 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/data/fcccbd5b5/6351cc955b7c47a698451db9ddf53ef1 [2023-11-23 21:13:04,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:13:04,366 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:13:04,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:04,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:13:04,373 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:13:04,374 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,375 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f089b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04, skipping insertion in model container [2023-11-23 21:13:04,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,434 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:13:04,625 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_74b363e5-2cbb-42d1-a113-806a197d2f9d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2023-11-23 21:13:04,679 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_74b363e5-2cbb-42d1-a113-806a197d2f9d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2023-11-23 21:13:04,744 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:04,775 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:13:04,793 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_74b363e5-2cbb-42d1-a113-806a197d2f9d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[914,927] [2023-11-23 21:13:04,828 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_74b363e5-2cbb-42d1-a113-806a197d2f9d/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.05.cil-2.c[7115,7128] [2023-11-23 21:13:04,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:13:04,897 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:13:04,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04 WrapperNode [2023-11-23 21:13:04,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:13:04,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:04,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:13:04,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:13:04,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,920 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,972 INFO L138 Inliner]: procedures = 63, calls = 73, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 656 [2023-11-23 21:13:04,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:13:04,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:13:04,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:13:04,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:13:04,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,984 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:04,990 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,004 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,015 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,020 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,024 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,031 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:13:05,032 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:13:05,032 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:13:05,032 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:13:05,033 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (1/1) ... [2023-11-23 21:13:05,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:13:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:05,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:13:05,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:13:05,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:13:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 21:13:05,159 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 21:13:05,159 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 21:13:05,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 21:13:05,160 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 21:13:05,160 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 21:13:05,160 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 21:13:05,160 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 21:13:05,160 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 21:13:05,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 21:13:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 21:13:05,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 21:13:05,161 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 21:13:05,162 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 21:13:05,162 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 21:13:05,163 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 21:13:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 21:13:05,164 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 21:13:05,164 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 21:13:05,165 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 21:13:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 21:13:05,165 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 21:13:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:13:05,165 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 21:13:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 21:13:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 21:13:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 21:13:05,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:13:05,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:13:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 21:13:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 21:13:05,167 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 21:13:05,167 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 21:13:05,284 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:13:05,287 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:13:06,177 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:13:06,517 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:13:06,518 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-23 21:13:06,519 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:06 BoogieIcfgContainer [2023-11-23 21:13:06,519 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:13:06,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:13:06,521 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:13:06,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:13:06,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:04" (1/3) ... [2023-11-23 21:13:06,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f46bf11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:06, skipping insertion in model container [2023-11-23 21:13:06,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:04" (2/3) ... [2023-11-23 21:13:06,526 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f46bf11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:06, skipping insertion in model container [2023-11-23 21:13:06,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:06" (3/3) ... [2023-11-23 21:13:06,527 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.05.cil-2.c [2023-11-23 21:13:06,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:13:06,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 21:13:06,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:13:06,608 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;@36d9298b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:13:06,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 21:13:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 195 states, 142 states have (on average 1.5) internal successors, (213), 150 states have internal predecessors, (213), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2023-11-23 21:13:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 21:13:06,626 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:06,627 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:06,628 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:06,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1718822381, now seen corresponding path program 1 times [2023-11-23 21:13:06,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:06,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039668063] [2023-11-23 21:13:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:06,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:07,325 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 21:13:07,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:07,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039668063] [2023-11-23 21:13:07,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039668063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:07,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:07,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 21:13:07,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50307746] [2023-11-23 21:13:07,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:07,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 21:13:07,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 21:13:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:13:07,383 INFO L87 Difference]: Start difference. First operand has 195 states, 142 states have (on average 1.5) internal successors, (213), 150 states have internal predecessors, (213), 35 states have call successors, (35), 15 states have call predecessors, (35), 15 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:13:08,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:08,452 INFO L93 Difference]: Finished difference Result 446 states and 634 transitions. [2023-11-23 21:13:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 21:13:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2023-11-23 21:13:08,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:08,480 INFO L225 Difference]: With dead ends: 446 [2023-11-23 21:13:08,480 INFO L226 Difference]: Without dead ends: 254 [2023-11-23 21:13:08,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 21:13:08,493 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 419 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:08,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 836 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 21:13:08,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2023-11-23 21:13:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 241. [2023-11-23 21:13:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 176 states have (on average 1.4090909090909092) internal successors, (248), 181 states have internal predecessors, (248), 43 states have call successors, (43), 22 states have call predecessors, (43), 20 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2023-11-23 21:13:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 330 transitions. [2023-11-23 21:13:08,589 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 330 transitions. Word has length 45 [2023-11-23 21:13:08,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:08,590 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 330 transitions. [2023-11-23 21:13:08,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2023-11-23 21:13:08,591 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 330 transitions. [2023-11-23 21:13:08,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 21:13:08,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:08,602 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:08,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:13:08,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:08,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1198480078, now seen corresponding path program 1 times [2023-11-23 21:13:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:08,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736874312] [2023-11-23 21:13:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:08,707 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 21:13:08,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:08,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736874312] [2023-11-23 21:13:08,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736874312] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:08,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:08,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:08,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146283584] [2023-11-23 21:13:08,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:08,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:08,712 INFO L87 Difference]: Start difference. First operand 241 states and 330 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:08,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:08,858 INFO L93 Difference]: Finished difference Result 466 states and 617 transitions. [2023-11-23 21:13:08,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:08,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-11-23 21:13:08,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:08,867 INFO L225 Difference]: With dead ends: 466 [2023-11-23 21:13:08,868 INFO L226 Difference]: Without dead ends: 350 [2023-11-23 21:13:08,873 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 21:13:08,875 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 241 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:08,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 285 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-11-23 21:13:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 336. [2023-11-23 21:13:08,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 241 states have (on average 1.3609958506224067) internal successors, (328), 246 states have internal predecessors, (328), 59 states have call successors, (59), 36 states have call predecessors, (59), 34 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-11-23 21:13:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 442 transitions. [2023-11-23 21:13:08,938 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 442 transitions. Word has length 46 [2023-11-23 21:13:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:08,939 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 442 transitions. [2023-11-23 21:13:08,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 442 transitions. [2023-11-23 21:13:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:13:08,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:08,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:08,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:13:08,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:08,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:08,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1704554619, now seen corresponding path program 1 times [2023-11-23 21:13:08,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:08,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434999025] [2023-11-23 21:13:08,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:08,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:09,058 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 21:13:09,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:09,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434999025] [2023-11-23 21:13:09,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434999025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:09,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:09,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946010664] [2023-11-23 21:13:09,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:09,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:09,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:09,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:09,065 INFO L87 Difference]: Start difference. First operand 336 states and 442 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:09,249 INFO L93 Difference]: Finished difference Result 700 states and 890 transitions. [2023-11-23 21:13:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:09,249 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2023-11-23 21:13:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:09,254 INFO L225 Difference]: With dead ends: 700 [2023-11-23 21:13:09,255 INFO L226 Difference]: Without dead ends: 490 [2023-11-23 21:13:09,261 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 21:13:09,266 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 68 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:09,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 426 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:09,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-23 21:13:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 486. [2023-11-23 21:13:09,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 346 states have (on average 1.3381502890173411) internal successors, (463), 351 states have internal predecessors, (463), 83 states have call successors, (83), 57 states have call predecessors, (83), 55 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2023-11-23 21:13:09,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 625 transitions. [2023-11-23 21:13:09,366 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 625 transitions. Word has length 47 [2023-11-23 21:13:09,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:09,368 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 625 transitions. [2023-11-23 21:13:09,368 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:09,368 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 625 transitions. [2023-11-23 21:13:09,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 21:13:09,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:09,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:09,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:13:09,373 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:09,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:09,375 INFO L85 PathProgramCache]: Analyzing trace with hash 236359772, now seen corresponding path program 1 times [2023-11-23 21:13:09,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:09,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220927433] [2023-11-23 21:13:09,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:09,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:09,511 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 21:13:09,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220927433] [2023-11-23 21:13:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220927433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 21:13:09,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375254344] [2023-11-23 21:13:09,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:09,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 21:13:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 21:13:09,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:13:09,515 INFO L87 Difference]: Start difference. First operand 486 states and 625 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:13:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:10,251 INFO L93 Difference]: Finished difference Result 1019 states and 1451 transitions. [2023-11-23 21:13:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 21:13:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-11-23 21:13:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:10,264 INFO L225 Difference]: With dead ends: 1019 [2023-11-23 21:13:10,264 INFO L226 Difference]: Without dead ends: 904 [2023-11-23 21:13:10,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:13:10,275 INFO L413 NwaCegarLoop]: 339 mSDtfsCounter, 835 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:10,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [835 Valid, 835 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:13:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2023-11-23 21:13:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 891. [2023-11-23 21:13:10,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 670 states have (on average 1.3835820895522388) internal successors, (927), 678 states have internal predecessors, (927), 140 states have call successors, (140), 81 states have call predecessors, (140), 79 states have return successors, (170), 133 states have call predecessors, (170), 136 states have call successors, (170) [2023-11-23 21:13:10,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1237 transitions. [2023-11-23 21:13:10,389 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1237 transitions. Word has length 47 [2023-11-23 21:13:10,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:10,390 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 1237 transitions. [2023-11-23 21:13:10,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:13:10,390 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1237 transitions. [2023-11-23 21:13:10,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 21:13:10,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:10,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:10,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:13:10,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:10,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:10,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1897891108, now seen corresponding path program 1 times [2023-11-23 21:13:10,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:10,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231076021] [2023-11-23 21:13:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:10,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:10,502 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 21:13:10,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231076021] [2023-11-23 21:13:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231076021] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:10,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:10,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:13:10,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919517659] [2023-11-23 21:13:10,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:10,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:13:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:10,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:13:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:13:10,506 INFO L87 Difference]: Start difference. First operand 891 states and 1237 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:10,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:10,711 INFO L93 Difference]: Finished difference Result 1315 states and 1759 transitions. [2023-11-23 21:13:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:13:10,712 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2023-11-23 21:13:10,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:10,719 INFO L225 Difference]: With dead ends: 1315 [2023-11-23 21:13:10,719 INFO L226 Difference]: Without dead ends: 954 [2023-11-23 21:13:10,721 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 21:13:10,722 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 241 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:10,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 292 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:13:10,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2023-11-23 21:13:10,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 942. [2023-11-23 21:13:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 706 states have (on average 1.3725212464589236) internal successors, (969), 714 states have internal predecessors, (969), 148 states have call successors, (148), 88 states have call predecessors, (148), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2023-11-23 21:13:10,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1295 transitions. [2023-11-23 21:13:10,816 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1295 transitions. Word has length 53 [2023-11-23 21:13:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:10,817 INFO L495 AbstractCegarLoop]: Abstraction has 942 states and 1295 transitions. [2023-11-23 21:13:10,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:13:10,817 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1295 transitions. [2023-11-23 21:13:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 21:13:10,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:10,819 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:10,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:13:10,819 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:10,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1811367480, now seen corresponding path program 1 times [2023-11-23 21:13:10,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:10,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317865163] [2023-11-23 21:13:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:10,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:10,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:10,985 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:10,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317865163] [2023-11-23 21:13:10,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317865163] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:10,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:13:10,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:13:10,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515427223] [2023-11-23 21:13:10,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:10,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:13:10,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:10,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:13:10,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:13:10,988 INFO L87 Difference]: Start difference. First operand 942 states and 1295 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:13:11,325 INFO L93 Difference]: Finished difference Result 1051 states and 1427 transitions. [2023-11-23 21:13:11,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:13:11,326 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2023-11-23 21:13:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:13:11,333 INFO L225 Difference]: With dead ends: 1051 [2023-11-23 21:13:11,333 INFO L226 Difference]: Without dead ends: 1048 [2023-11-23 21:13:11,334 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 21:13:11,335 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 436 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:13:11,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 271 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:13:11,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2023-11-23 21:13:11,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 941. [2023-11-23 21:13:11,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 706 states have (on average 1.368271954674221) internal successors, (966), 713 states have internal predecessors, (966), 147 states have call successors, (147), 88 states have call predecessors, (147), 86 states have return successors, (178), 141 states have call predecessors, (178), 144 states have call successors, (178) [2023-11-23 21:13:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1291 transitions. [2023-11-23 21:13:11,436 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1291 transitions. Word has length 54 [2023-11-23 21:13:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:13:11,439 INFO L495 AbstractCegarLoop]: Abstraction has 941 states and 1291 transitions. [2023-11-23 21:13:11,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2023-11-23 21:13:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1291 transitions. [2023-11-23 21:13:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 21:13:11,441 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:13:11,442 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:13:11,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:13:11,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:13:11,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:13:11,443 INFO L85 PathProgramCache]: Analyzing trace with hash -318770706, now seen corresponding path program 1 times [2023-11-23 21:13:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:13:11,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747162669] [2023-11-23 21:13:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:13:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:11,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:13:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747162669] [2023-11-23 21:13:11,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747162669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:13:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785906393] [2023-11-23 21:13:11,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:13:11,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:13:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:13:11,621 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:13:11,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_74b363e5-2cbb-42d1-a113-806a197d2f9d/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:13:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:13:11,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:13:11,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:13:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:12,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:13:12,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:13:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785906393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:13:12,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306701992] [2023-11-23 21:13:12,202 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 21:13:12,203 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:13:12,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:13:12,213 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:13:12,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:13:17,588 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 141 for LOIs [2023-11-23 21:13:17,678 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 137 for LOIs [2023-11-23 21:13:17,766 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 145 for LOIs [2023-11-23 21:13:18,878 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 141 for LOIs [2023-11-23 21:13:19,100 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 141 for LOIs [2023-11-23 21:13:19,326 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 141 for LOIs [2023-11-23 21:13:19,425 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 148 for LOIs [2023-11-23 21:13:19,490 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:13:35,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1306701992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:13:35,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:13:35,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 21:13:35,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612211580] [2023-11-23 21:13:35,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:13:35,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 21:13:35,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:13:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 21:13:35,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 21:13:35,102 INFO L87 Difference]: Start difference. First operand 941 states and 1291 transitions. Second operand has 36 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7)