./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:22,591 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:22,659 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:32:22,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:22,665 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:22,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:22,700 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:22,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:22,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:22,703 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:22,704 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:22,705 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:22,705 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:22,710 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:22,711 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:22,711 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:22,713 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:22,713 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:22,714 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:22,714 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:22,715 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:22,715 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:22,717 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:22,717 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:32:22,718 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:22,727 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:22,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:22,728 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:22,729 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:32:22,729 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:22,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:32:22,731 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:22,731 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:32:22,732 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:22,732 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:22,733 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:22,733 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:22,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:22,734 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:22,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:22,735 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:32:22,736 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:22,736 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:22,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:22,737 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:32:22,737 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:22,738 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:22,738 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2023-11-23 20:32:23,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:23,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:23,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:23,034 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:23,034 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:23,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2023-11-23 20:32:26,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:26,554 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:26,555 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2023-11-23 20:32:26,575 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/data/c34c6a6df/2f457e9735d54deebd31a19d66905409/FLAG24d5a3af3 [2023-11-23 20:32:26,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/data/c34c6a6df/2f457e9735d54deebd31a19d66905409 [2023-11-23 20:32:26,597 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:26,599 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:26,601 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:26,602 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:26,608 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:26,609 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:26" (1/1) ... [2023-11-23 20:32:26,611 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56c91899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:26, skipping insertion in model container [2023-11-23 20:32:26,611 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:26" (1/1) ... [2023-11-23 20:32:26,678 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:26,850 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2023-11-23 20:32:26,918 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2023-11-23 20:32:27,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:27,030 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:27,043 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2023-11-23 20:32:27,071 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_dcc16bd3-af9f-45b4-981c-26de5144b9fc/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2023-11-23 20:32:27,147 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:27,185 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:27,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27 WrapperNode [2023-11-23 20:32:27,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:27,187 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:27,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:27,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:27,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,213 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,280 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 716 [2023-11-23 20:32:27,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:27,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:27,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:27,282 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:27,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,297 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,297 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,362 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,384 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:27,388 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:27,388 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:27,388 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:27,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (1/1) ... [2023-11-23 20:32:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:27,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:27,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:27,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:27,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:27,487 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-23 20:32:27,488 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-23 20:32:27,488 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2023-11-23 20:32:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2023-11-23 20:32:27,489 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2023-11-23 20:32:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2023-11-23 20:32:27,489 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2023-11-23 20:32:27,489 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2023-11-23 20:32:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2023-11-23 20:32:27,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2023-11-23 20:32:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2023-11-23 20:32:27,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2023-11-23 20:32:27,490 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2023-11-23 20:32:27,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2023-11-23 20:32:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2023-11-23 20:32:27,491 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2023-11-23 20:32:27,491 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2023-11-23 20:32:27,491 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2023-11-23 20:32:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2023-11-23 20:32:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2023-11-23 20:32:27,492 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2023-11-23 20:32:27,492 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2023-11-23 20:32:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:32:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2023-11-23 20:32:27,493 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2023-11-23 20:32:27,493 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2023-11-23 20:32:27,493 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2023-11-23 20:32:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:27,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2023-11-23 20:32:27,494 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2023-11-23 20:32:27,494 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2023-11-23 20:32:27,495 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2023-11-23 20:32:27,643 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:27,646 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:28,785 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:29,263 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:29,263 INFO L309 CfgBuilder]: Removed 13 assume(true) statements. [2023-11-23 20:32:29,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:29 BoogieIcfgContainer [2023-11-23 20:32:29,265 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:29,270 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:29,270 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:29,274 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:29,274 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:26" (1/3) ... [2023-11-23 20:32:29,275 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd5c0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:29, skipping insertion in model container [2023-11-23 20:32:29,275 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:27" (2/3) ... [2023-11-23 20:32:29,277 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd5c0eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:29, skipping insertion in model container [2023-11-23 20:32:29,278 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:29" (3/3) ... [2023-11-23 20:32:29,280 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2023-11-23 20:32:29,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:29,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-23 20:32:29,390 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:29,398 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;@2981565b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:29,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-23 20:32:29,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-11-23 20:32:29,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:32:29,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:29,420 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 20:32:29,421 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:29,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:29,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1121798692, now seen corresponding path program 1 times [2023-11-23 20:32:29,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:29,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359585401] [2023-11-23 20:32:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:29,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:29,932 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 20:32:29,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:29,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359585401] [2023-11-23 20:32:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359585401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:29,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:29,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:32:29,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751987917] [2023-11-23 20:32:29,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:29,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:32:29,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:29,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:32:29,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:32:29,988 INFO L87 Difference]: Start difference. First operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:32:31,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:31,081 INFO L93 Difference]: Finished difference Result 833 states and 1202 transitions. [2023-11-23 20:32:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:32:31,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2023-11-23 20:32:31,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:31,115 INFO L225 Difference]: With dead ends: 833 [2023-11-23 20:32:31,115 INFO L226 Difference]: Without dead ends: 612 [2023-11-23 20:32:31,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:32:31,127 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 903 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:31,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 935 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:32:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2023-11-23 20:32:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 541. [2023-11-23 20:32:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 387 states have (on average 1.330749354005168) internal successors, (515), 392 states have internal predecessors, (515), 91 states have call successors, (91), 63 states have call predecessors, (91), 61 states have return successors, (102), 87 states have call predecessors, (102), 87 states have call successors, (102) [2023-11-23 20:32:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 708 transitions. [2023-11-23 20:32:31,295 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 708 transitions. Word has length 45 [2023-11-23 20:32:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:31,296 INFO L495 AbstractCegarLoop]: Abstraction has 541 states and 708 transitions. [2023-11-23 20:32:31,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:32:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 708 transitions. [2023-11-23 20:32:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-23 20:32:31,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:31,300 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 20:32:31,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:32:31,301 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:31,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:31,302 INFO L85 PathProgramCache]: Analyzing trace with hash -232898874, now seen corresponding path program 1 times [2023-11-23 20:32:31,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:31,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403338167] [2023-11-23 20:32:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:31,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:31,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:31,792 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 20:32:31,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403338167] [2023-11-23 20:32:31,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403338167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:31,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:31,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 20:32:31,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66891748] [2023-11-23 20:32:31,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:31,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 20:32:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 20:32:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:32:31,806 INFO L87 Difference]: Start difference. First operand 541 states and 708 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 20:32:32,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:32,792 INFO L93 Difference]: Finished difference Result 1302 states and 1655 transitions. [2023-11-23 20:32:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:32:32,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 46 [2023-11-23 20:32:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:32,809 INFO L225 Difference]: With dead ends: 1302 [2023-11-23 20:32:32,809 INFO L226 Difference]: Without dead ends: 899 [2023-11-23 20:32:32,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:32:32,817 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 419 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:32,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 871 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:32:32,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2023-11-23 20:32:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 870. [2023-11-23 20:32:32,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 610 states have (on average 1.2885245901639344) internal successors, (786), 616 states have internal predecessors, (786), 147 states have call successors, (147), 111 states have call predecessors, (147), 111 states have return successors, (176), 144 states have call predecessors, (176), 143 states have call successors, (176) [2023-11-23 20:32:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1109 transitions. [2023-11-23 20:32:32,960 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1109 transitions. Word has length 46 [2023-11-23 20:32:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:32,961 INFO L495 AbstractCegarLoop]: Abstraction has 870 states and 1109 transitions. [2023-11-23 20:32:32,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 20:32:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1109 transitions. [2023-11-23 20:32:32,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-23 20:32:32,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:32,971 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 20:32:32,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:32:32,971 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:32,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2053007370, now seen corresponding path program 1 times [2023-11-23 20:32:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:32,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941462959] [2023-11-23 20:32:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:32,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:33,103 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 20:32:33,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:33,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941462959] [2023-11-23 20:32:33,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941462959] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:33,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:33,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783460093] [2023-11-23 20:32:33,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:33,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:33,107 INFO L87 Difference]: Start difference. First operand 870 states and 1109 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 20:32:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:33,375 INFO L93 Difference]: Finished difference Result 1811 states and 2268 transitions. [2023-11-23 20:32:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:33,377 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 20:32:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:33,386 INFO L225 Difference]: With dead ends: 1811 [2023-11-23 20:32:33,386 INFO L226 Difference]: Without dead ends: 1129 [2023-11-23 20:32:33,392 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 20:32:33,398 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 68 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:33,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 464 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2023-11-23 20:32:33,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 1107. [2023-11-23 20:32:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 771 states have (on average 1.2710765239948119) internal successors, (980), 777 states have internal predecessors, (980), 189 states have call successors, (189), 149 states have call predecessors, (189), 145 states have return successors, (222), 182 states have call predecessors, (222), 185 states have call successors, (222) [2023-11-23 20:32:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1391 transitions. [2023-11-23 20:32:33,550 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1391 transitions. Word has length 47 [2023-11-23 20:32:33,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:33,551 INFO L495 AbstractCegarLoop]: Abstraction has 1107 states and 1391 transitions. [2023-11-23 20:32:33,552 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 20:32:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1391 transitions. [2023-11-23 20:32:33,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-23 20:32:33,558 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:33,559 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] [2023-11-23 20:32:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:32:33,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:33,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1957339654, now seen corresponding path program 1 times [2023-11-23 20:32:33,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:33,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159843162] [2023-11-23 20:32:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:33,779 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 20:32:33,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:33,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159843162] [2023-11-23 20:32:33,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159843162] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:33,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:33,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:32:33,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123691986] [2023-11-23 20:32:33,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:33,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:33,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:33,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:33,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:33,783 INFO L87 Difference]: Start difference. First operand 1107 states and 1391 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 20:32:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:34,727 INFO L93 Difference]: Finished difference Result 1700 states and 2319 transitions. [2023-11-23 20:32:34,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:32:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 50 [2023-11-23 20:32:34,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:34,743 INFO L225 Difference]: With dead ends: 1700 [2023-11-23 20:32:34,743 INFO L226 Difference]: Without dead ends: 1573 [2023-11-23 20:32:34,745 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 20:32:34,753 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 936 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:34,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 926 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:32:34,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2023-11-23 20:32:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1560. [2023-11-23 20:32:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1139 states have (on average 1.327480245829675) internal successors, (1512), 1148 states have internal predecessors, (1512), 250 states have call successors, (250), 173 states have call predecessors, (250), 169 states have return successors, (321), 240 states have call predecessors, (321), 246 states have call successors, (321) [2023-11-23 20:32:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2083 transitions. [2023-11-23 20:32:34,936 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2083 transitions. Word has length 50 [2023-11-23 20:32:34,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:34,937 INFO L495 AbstractCegarLoop]: Abstraction has 1560 states and 2083 transitions. [2023-11-23 20:32:34,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 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 20:32:34,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2083 transitions. [2023-11-23 20:32:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-23 20:32:34,939 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:34,939 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] [2023-11-23 20:32:34,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:32:34,940 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:34,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:34,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1949144441, now seen corresponding path program 1 times [2023-11-23 20:32:34,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:34,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284630072] [2023-11-23 20:32:34,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:34,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:32:35,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284630072] [2023-11-23 20:32:35,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284630072] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:35,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:35,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:32:35,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796664263] [2023-11-23 20:32:35,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:35,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:32:35,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:35,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:32:35,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:32:35,012 INFO L87 Difference]: Start difference. First operand 1560 states and 2083 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 20:32:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:35,288 INFO L93 Difference]: Finished difference Result 1966 states and 2573 transitions. [2023-11-23 20:32:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:32:35,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 20:32:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:35,301 INFO L225 Difference]: With dead ends: 1966 [2023-11-23 20:32:35,301 INFO L226 Difference]: Without dead ends: 1411 [2023-11-23 20:32:35,304 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 20:32:35,307 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 254 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:35,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 309 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2023-11-23 20:32:35,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1205. [2023-11-23 20:32:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 903 states have (on average 1.3388704318936877) internal successors, (1209), 911 states have internal predecessors, (1209), 187 states have call successors, (187), 119 states have call predecessors, (187), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2023-11-23 20:32:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1625 transitions. [2023-11-23 20:32:35,459 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1625 transitions. Word has length 53 [2023-11-23 20:32:35,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:35,464 INFO L495 AbstractCegarLoop]: Abstraction has 1205 states and 1625 transitions. [2023-11-23 20:32:35,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 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 20:32:35,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1625 transitions. [2023-11-23 20:32:35,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:32:35,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:35,468 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 20:32:35,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:32:35,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:35,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:35,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1581639964, now seen corresponding path program 1 times [2023-11-23 20:32:35,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:35,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690139809] [2023-11-23 20:32:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:35,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:35,630 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 20:32:35,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:35,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690139809] [2023-11-23 20:32:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690139809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:32:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973562985] [2023-11-23 20:32:35,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:32:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:32:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:32:35,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:35,635 INFO L87 Difference]: Start difference. First operand 1205 states and 1625 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 20:32:36,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:36,075 INFO L93 Difference]: Finished difference Result 1460 states and 1926 transitions. [2023-11-23 20:32:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:32:36,076 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 20:32:36,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:36,088 INFO L225 Difference]: With dead ends: 1460 [2023-11-23 20:32:36,088 INFO L226 Difference]: Without dead ends: 1457 [2023-11-23 20:32:36,089 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 20:32:36,091 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 467 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:36,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [467 Valid, 285 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2023-11-23 20:32:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1204. [2023-11-23 20:32:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 903 states have (on average 1.3322259136212624) internal successors, (1203), 910 states have internal predecessors, (1203), 186 states have call successors, (186), 119 states have call predecessors, (186), 113 states have return successors, (229), 176 states have call predecessors, (229), 183 states have call successors, (229) [2023-11-23 20:32:36,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1618 transitions. [2023-11-23 20:32:36,257 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1618 transitions. Word has length 54 [2023-11-23 20:32:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:36,261 INFO L495 AbstractCegarLoop]: Abstraction has 1204 states and 1618 transitions. [2023-11-23 20:32:36,261 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 20:32:36,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1618 transitions. [2023-11-23 20:32:36,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:32:36,263 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:36,263 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 20:32:36,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:32:36,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:32:36,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:36,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1787226637, now seen corresponding path program 1 times [2023-11-23 20:32:36,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:32:36,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666302841] [2023-11-23 20:32:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:36,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:32:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:36,460 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 20:32:36,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:32:36,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666302841] [2023-11-23 20:32:36,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666302841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:32:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021124723] [2023-11-23 20:32:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:36,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:32:36,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:36,468 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:32:36,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dcc16bd3-af9f-45b4-981c-26de5144b9fc/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:32:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:36,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:32:36,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:36,995 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 20:32:36,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:32:37,126 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 20:32:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021124723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:32:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20633232] [2023-11-23 20:32:37,154 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2023-11-23 20:32:37,154 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:32:37,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:32:37,168 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:32:37,169 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:32:44,072 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2023-11-23 20:32:44,179 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2023-11-23 20:32:44,282 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2023-11-23 20:32:45,440 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2023-11-23 20:32:45,689 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2023-11-23 20:32:45,943 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2023-11-23 20:32:46,038 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2023-11-23 20:32:46,138 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:33:06,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [20633232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:06,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:06,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [5, 5, 4] total 41 [2023-11-23 20:33:06,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993790268] [2023-11-23 20:33:06,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:06,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-23 20:33:06,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:06,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-23 20:33:06,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2023-11-23 20:33:06,080 INFO L87 Difference]: Start difference. First operand 1204 states and 1618 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)