./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2 --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 a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:26:41,168 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:26:41,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:26:41,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:26:41,275 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:26:41,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:26:41,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:26:41,319 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:26:41,320 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:26:41,321 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:26:41,321 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:26:41,322 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:26:41,323 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:26:41,328 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:26:41,328 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:26:41,329 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:26:41,329 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:26:41,329 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:26:41,330 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:26:41,330 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:26:41,330 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:26:41,333 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:26:41,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:26:41,335 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:26:41,335 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:26:41,335 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:26:41,336 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:26:41,336 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:26:41,336 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:26:41,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:26:41,337 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:26:41,339 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:26:41,339 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:26:41,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:26:41,340 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:26:41,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:26:41,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:26:41,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:26:41,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:41,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:26:41,342 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:26:41,342 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:26:41,342 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:26:41,343 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:26:41,343 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:26:41,344 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:26:41,344 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:26:41,344 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_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e [2024-11-02 11:26:41,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:26:41,681 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:26:41,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:26:41,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:26:41,687 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:26:41,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c Unable to find full path for "g++" [2024-11-02 11:26:43,937 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:26:44,223 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:26:44,224 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2024-11-02 11:26:44,244 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/data/fb138edd5/1ab82b32e5994648834ea1536ca9b4b5/FLAG7381f6d92 [2024-11-02 11:26:44,518 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/data/fb138edd5/1ab82b32e5994648834ea1536ca9b4b5 [2024-11-02 11:26:44,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:26:44,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:26:44,524 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:44,525 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:26:44,531 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:26:44,531 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:44" (1/1) ... [2024-11-02 11:26:44,532 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60113de7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:44, skipping insertion in model container [2024-11-02 11:26:44,532 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:26:44" (1/1) ... [2024-11-02 11:26:44,604 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:26:44,823 WARN L251 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_5dea826d-257e-47dd-a895-a9d44d16c577/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2024-11-02 11:26:44,907 WARN L251 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_5dea826d-257e-47dd-a895-a9d44d16c577/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2024-11-02 11:26:45,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:45,070 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:26:45,084 WARN L251 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_5dea826d-257e-47dd-a895-a9d44d16c577/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[914,927] [2024-11-02 11:26:45,120 WARN L251 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_5dea826d-257e-47dd-a895-a9d44d16c577/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c[7115,7128] [2024-11-02 11:26:45,231 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:26:45,266 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:26:45,266 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45 WrapperNode [2024-11-02 11:26:45,266 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:26:45,267 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:45,268 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:26:45,268 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:26:45,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,289 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,350 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1072 [2024-11-02 11:26:45,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:26:45,354 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:26:45,354 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:26:45,354 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:26:45,363 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,369 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,369 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,385 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,399 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,403 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,414 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:26:45,415 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:26:45,415 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:26:45,415 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:26:45,416 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (1/1) ... [2024-11-02 11:26:45,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:26:45,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:45,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:26:45,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:26:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:26:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:26:45,509 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:26:45,509 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-02 11:26:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-02 11:26:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 11:26:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 11:26:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 11:26:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 11:26:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-02 11:26:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-02 11:26:45,510 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 11:26:45,510 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 11:26:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 11:26:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 11:26:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-02 11:26:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-02 11:26:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-02 11:26:45,511 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-02 11:26:45,511 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-02 11:26:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-02 11:26:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 11:26:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 11:26:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:26:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 11:26:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 11:26:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-02 11:26:45,512 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-02 11:26:45,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:26:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:26:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 11:26:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 11:26:45,513 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 11:26:45,513 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 11:26:45,646 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:26:45,648 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:26:47,088 INFO L? ?]: Removed 131 outVars from TransFormulas that were not future-live. [2024-11-02 11:26:47,089 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:26:47,811 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:26:47,811 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-02 11:26:47,811 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:47 BoogieIcfgContainer [2024-11-02 11:26:47,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:26:47,817 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:26:47,817 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:26:47,820 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:26:47,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:26:44" (1/3) ... [2024-11-02 11:26:47,821 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51380808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:47, skipping insertion in model container [2024-11-02 11:26:47,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:26:45" (2/3) ... [2024-11-02 11:26:47,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51380808 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:26:47, skipping insertion in model container [2024-11-02 11:26:47,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:26:47" (3/3) ... [2024-11-02 11:26:47,824 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.14.cil.c [2024-11-02 11:26:47,842 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:26:47,843 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:26:47,945 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:26:47,951 INFO L333 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, 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;@5f904b48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:26:47,952 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:26:47,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2024-11-02 11:26:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 11:26:47,973 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:47,974 INFO L215 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] [2024-11-02 11:26:47,975 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:47,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:47,983 INFO L85 PathProgramCache]: Analyzing trace with hash -467793636, now seen corresponding path program 1 times [2024-11-02 11:26:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:47,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749812107] [2024-11-02 11:26:47,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:47,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:48,413 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:48,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749812107] [2024-11-02 11:26:48,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749812107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:48,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:48,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954608413] [2024-11-02 11:26:48,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:48,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:26:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:48,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:26:48,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:48,462 INFO L87 Difference]: Start difference. First operand has 279 states, 219 states have (on average 1.5159817351598173) internal successors, (332), 227 states have internal predecessors, (332), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 11:26:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:49,172 INFO L93 Difference]: Finished difference Result 608 states and 903 transitions. [2024-11-02 11:26:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:26:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-02 11:26:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:49,198 INFO L225 Difference]: With dead ends: 608 [2024-11-02 11:26:49,199 INFO L226 Difference]: Without dead ends: 333 [2024-11-02 11:26:49,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:49,214 INFO L432 NwaCegarLoop]: 394 mSDtfsCounter, 462 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:49,218 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 688 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-02 11:26:49,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-11-02 11:26:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 326. [2024-11-02 11:26:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 254 states have (on average 1.437007874015748) internal successors, (365), 259 states have internal predecessors, (365), 50 states have call successors, (50), 22 states have call predecessors, (50), 20 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-11-02 11:26:49,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 461 transitions. [2024-11-02 11:26:49,345 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 461 transitions. Word has length 45 [2024-11-02 11:26:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:49,346 INFO L471 AbstractCegarLoop]: Abstraction has 326 states and 461 transitions. [2024-11-02 11:26:49,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-02 11:26:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 461 transitions. [2024-11-02 11:26:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-02 11:26:49,351 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:49,351 INFO L215 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] [2024-11-02 11:26:49,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:26:49,352 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:49,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:49,354 INFO L85 PathProgramCache]: Analyzing trace with hash 451180987, now seen corresponding path program 1 times [2024-11-02 11:26:49,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:49,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091149530] [2024-11-02 11:26:49,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:49,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:49,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:49,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091149530] [2024-11-02 11:26:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091149530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:49,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:49,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-02 11:26:49,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974683157] [2024-11-02 11:26:49,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:49,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 11:26:49,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 11:26:49,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-02 11:26:49,602 INFO L87 Difference]: Start difference. First operand 326 states and 461 transitions. 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) [2024-11-02 11:26:50,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:50,490 INFO L93 Difference]: Finished difference Result 728 states and 964 transitions. [2024-11-02 11:26:50,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 11:26:50,491 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 [2024-11-02 11:26:50,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:50,497 INFO L225 Difference]: With dead ends: 728 [2024-11-02 11:26:50,498 INFO L226 Difference]: Without dead ends: 596 [2024-11-02 11:26:50,499 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-02 11:26:50,501 INFO L432 NwaCegarLoop]: 450 mSDtfsCounter, 946 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:50,501 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 1156 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-02 11:26:50,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2024-11-02 11:26:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 512. [2024-11-02 11:26:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 386 states have (on average 1.3601036269430051) internal successors, (525), 392 states have internal predecessors, (525), 77 states have call successors, (77), 45 states have call predecessors, (77), 47 states have return successors, (77), 76 states have call predecessors, (77), 73 states have call successors, (77) [2024-11-02 11:26:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 679 transitions. [2024-11-02 11:26:50,587 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 679 transitions. Word has length 45 [2024-11-02 11:26:50,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:50,587 INFO L471 AbstractCegarLoop]: Abstraction has 512 states and 679 transitions. [2024-11-02 11:26:50,588 INFO L472 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) [2024-11-02 11:26:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 679 transitions. [2024-11-02 11:26:50,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:26:50,595 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:50,595 INFO L215 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] [2024-11-02 11:26:50,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:26:50,596 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:50,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash -748286143, now seen corresponding path program 1 times [2024-11-02 11:26:50,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:50,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924364792] [2024-11-02 11:26:50,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:50,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:50,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:50,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:50,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924364792] [2024-11-02 11:26:50,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924364792] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:50,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-02 11:26:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703037258] [2024-11-02 11:26:50,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:50,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 11:26:50,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:50,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 11:26:50,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-02 11:26:50,956 INFO L87 Difference]: Start difference. First operand 512 states and 679 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) [2024-11-02 11:26:52,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:52,099 INFO L93 Difference]: Finished difference Result 1028 states and 1295 transitions. [2024-11-02 11:26:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-02 11:26:52,100 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 [2024-11-02 11:26:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:52,108 INFO L225 Difference]: With dead ends: 1028 [2024-11-02 11:26:52,109 INFO L226 Difference]: Without dead ends: 726 [2024-11-02 11:26:52,112 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-02 11:26:52,115 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 554 mSDsluCounter, 824 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:52,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1050 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-02 11:26:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2024-11-02 11:26:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 691. [2024-11-02 11:26:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 691 states, 511 states have (on average 1.324853228962818) internal successors, (677), 518 states have internal predecessors, (677), 104 states have call successors, (104), 68 states have call predecessors, (104), 74 states have return successors, (108), 106 states have call predecessors, (108), 100 states have call successors, (108) [2024-11-02 11:26:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 889 transitions. [2024-11-02 11:26:52,240 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 889 transitions. Word has length 46 [2024-11-02 11:26:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:52,241 INFO L471 AbstractCegarLoop]: Abstraction has 691 states and 889 transitions. [2024-11-02 11:26:52,242 INFO L472 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) [2024-11-02 11:26:52,242 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 889 transitions. [2024-11-02 11:26:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:26:52,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:52,250 INFO L215 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] [2024-11-02 11:26:52,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:26:52,250 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:52,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:52,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1039530571, now seen corresponding path program 1 times [2024-11-02 11:26:52,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679731378] [2024-11-02 11:26:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:52,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:52,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679731378] [2024-11-02 11:26:52,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679731378] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:52,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:52,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:52,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390452243] [2024-11-02 11:26:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:52,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:52,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:52,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:52,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:52,352 INFO L87 Difference]: Start difference. First operand 691 states and 889 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) [2024-11-02 11:26:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:52,621 INFO L93 Difference]: Finished difference Result 1255 states and 1559 transitions. [2024-11-02 11:26:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:52,622 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 [2024-11-02 11:26:52,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:52,628 INFO L225 Difference]: With dead ends: 1255 [2024-11-02 11:26:52,629 INFO L226 Difference]: Without dead ends: 823 [2024-11-02 11:26:52,631 INFO L431 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 [2024-11-02 11:26:52,632 INFO L432 NwaCegarLoop]: 343 mSDtfsCounter, 67 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:52,633 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 655 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:52,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2024-11-02 11:26:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2024-11-02 11:26:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 534 states have (on average 1.3146067415730338) internal successors, (702), 541 states have internal predecessors, (702), 106 states have call successors, (106), 70 states have call predecessors, (106), 76 states have return successors, (110), 108 states have call predecessors, (110), 102 states have call successors, (110) [2024-11-02 11:26:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 918 transitions. [2024-11-02 11:26:52,707 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 918 transitions. Word has length 47 [2024-11-02 11:26:52,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:52,709 INFO L471 AbstractCegarLoop]: Abstraction has 718 states and 918 transitions. [2024-11-02 11:26:52,709 INFO L472 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) [2024-11-02 11:26:52,709 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 918 transitions. [2024-11-02 11:26:52,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-02 11:26:52,712 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:52,712 INFO L215 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] [2024-11-02 11:26:52,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:26:52,712 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:52,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:52,713 INFO L85 PathProgramCache]: Analyzing trace with hash 222888478, now seen corresponding path program 1 times [2024-11-02 11:26:52,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:52,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001255198] [2024-11-02 11:26:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:52,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:52,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 11:26:52,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001255198] [2024-11-02 11:26:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001255198] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:52,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:52,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:26:52,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009133207] [2024-11-02 11:26:52,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:52,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:26:52,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:26:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:26:52,812 INFO L87 Difference]: Start difference. First operand 718 states and 918 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) [2024-11-02 11:26:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:53,049 INFO L93 Difference]: Finished difference Result 908 states and 1139 transitions. [2024-11-02 11:26:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:26:53,050 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 [2024-11-02 11:26:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:53,056 INFO L225 Difference]: With dead ends: 908 [2024-11-02 11:26:53,056 INFO L226 Difference]: Without dead ends: 635 [2024-11-02 11:26:53,057 INFO L431 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 [2024-11-02 11:26:53,059 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 367 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:53,061 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 406 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 11:26:53,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2024-11-02 11:26:53,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 526. [2024-11-02 11:26:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 394 states have (on average 1.3197969543147208) internal successors, (520), 399 states have internal predecessors, (520), 82 states have call successors, (82), 50 states have call predecessors, (82), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2024-11-02 11:26:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 680 transitions. [2024-11-02 11:26:53,145 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 680 transitions. Word has length 53 [2024-11-02 11:26:53,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:53,146 INFO L471 AbstractCegarLoop]: Abstraction has 526 states and 680 transitions. [2024-11-02 11:26:53,147 INFO L472 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) [2024-11-02 11:26:53,147 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 680 transitions. [2024-11-02 11:26:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-02 11:26:53,149 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:53,149 INFO L215 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] [2024-11-02 11:26:53,149 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:26:53,150 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:53,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:53,150 INFO L85 PathProgramCache]: Analyzing trace with hash 125796191, now seen corresponding path program 1 times [2024-11-02 11:26:53,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:53,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055194144] [2024-11-02 11:26:53,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:53,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:53,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:53,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:53,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055194144] [2024-11-02 11:26:53,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055194144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:26:53,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:26:53,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:26:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802808556] [2024-11-02 11:26:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:26:53,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:26:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:26:53,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:26:53,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:26:53,296 INFO L87 Difference]: Start difference. First operand 526 states and 680 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) [2024-11-02 11:26:53,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:26:53,744 INFO L93 Difference]: Finished difference Result 629 states and 796 transitions. [2024-11-02 11:26:53,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:26:53,745 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 [2024-11-02 11:26:53,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:26:53,751 INFO L225 Difference]: With dead ends: 629 [2024-11-02 11:26:53,751 INFO L226 Difference]: Without dead ends: 626 [2024-11-02 11:26:53,752 INFO L431 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 [2024-11-02 11:26:53,753 INFO L432 NwaCegarLoop]: 337 mSDtfsCounter, 667 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-02 11:26:53,753 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 377 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-02 11:26:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2024-11-02 11:26:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 525. [2024-11-02 11:26:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 394 states have (on average 1.3121827411167513) internal successors, (517), 398 states have internal predecessors, (517), 81 states have call successors, (81), 50 states have call predecessors, (81), 48 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2024-11-02 11:26:53,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 676 transitions. [2024-11-02 11:26:53,828 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 676 transitions. Word has length 54 [2024-11-02 11:26:53,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:26:53,829 INFO L471 AbstractCegarLoop]: Abstraction has 525 states and 676 transitions. [2024-11-02 11:26:53,829 INFO L472 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) [2024-11-02 11:26:53,829 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 676 transitions. [2024-11-02 11:26:53,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-02 11:26:53,832 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:26:53,832 INFO L215 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] [2024-11-02 11:26:53,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:26:53,833 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:26:53,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:26:53,833 INFO L85 PathProgramCache]: Analyzing trace with hash -396747874, now seen corresponding path program 1 times [2024-11-02 11:26:53,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:26:53,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811675413] [2024-11-02 11:26:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:53,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:26:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:54,031 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:26:54,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811675413] [2024-11-02 11:26:54,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811675413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:26:54,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686288387] [2024-11-02 11:26:54,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:26:54,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:26:54,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:26:54,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:26:54,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dea826d-257e-47dd-a895-a9d44d16c577/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:26:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:26:54,194 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:26:54,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:26:54,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:54,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:26:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:26:54,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686288387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:26:54,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [659396198] [2024-11-02 11:26:54,677 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-02 11:26:54,677 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:26:54,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:26:54,690 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:26:54,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:27:03,646 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2024-11-02 11:27:03,773 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2024-11-02 11:27:03,910 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2024-11-02 11:27:05,460 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2024-11-02 11:27:05,744 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2024-11-02 11:27:06,121 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2024-11-02 11:27:06,228 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2024-11-02 11:27:06,332 INFO L180 IcfgInterpreter]: Interpretation finished