./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje --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 a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 06:00:42,268 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:00:42,357 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 06:00:42,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:00:42,366 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:00:42,408 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:00:42,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:00:42,409 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:00:42,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:00:42,412 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:00:42,412 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 06:00:42,413 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 06:00:42,413 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 06:00:42,413 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 06:00:42,413 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 06:00:42,414 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 06:00:42,414 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 06:00:42,414 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 06:00:42,415 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 06:00:42,415 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 06:00:42,415 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 06:00:42,422 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 06:00:42,423 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:00:42,423 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:00:42,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:00:42,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:00:42,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:00:42,424 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:00:42,424 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:00:42,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:00:42,425 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:00:42,425 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:00:42,425 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:00:42,426 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:00:42,427 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:00:42,441 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:00:42,441 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 06:00:42,442 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:00:42,442 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:00:42,442 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:00:42,442 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:00:42,443 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:00:42,443 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 06:00:42,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:00:42,444 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:00:42,444 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 06:00:42,445 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:00:42,445 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_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2024-11-09 06:00:42,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:00:42,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:00:42,735 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:00:42,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:00:42,738 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:00:42,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c Unable to find full path for "g++" [2024-11-09 06:00:44,886 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:00:45,184 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:00:45,184 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2024-11-09 06:00:45,204 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/data/a71f6747f/5d79419bace443388c16ca82e0776cd8/FLAGbc2fcb241 [2024-11-09 06:00:45,230 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/data/a71f6747f/5d79419bace443388c16ca82e0776cd8 [2024-11-09 06:00:45,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:00:45,235 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:00:45,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:00:45,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:00:45,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:00:45,246 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:00:45" (1/1) ... [2024-11-09 06:00:45,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@516155ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:45, skipping insertion in model container [2024-11-09 06:00:45,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:00:45" (1/1) ... [2024-11-09 06:00:45,320 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:00:45,574 WARN L250 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_501044d6-ee35-49b9-8995-754563ecbfc5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2024-11-09 06:00:45,673 WARN L250 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_501044d6-ee35-49b9-8995-754563ecbfc5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2024-11-09 06:00:45,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:00:45,920 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:00:45,936 WARN L250 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_501044d6-ee35-49b9-8995-754563ecbfc5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[914,927] [2024-11-09 06:00:45,970 WARN L250 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_501044d6-ee35-49b9-8995-754563ecbfc5/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c[7115,7128] [2024-11-09 06:00:46,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:00:46,100 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:00:46,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46 WrapperNode [2024-11-09 06:00:46,100 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:00:46,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:00:46,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:00:46,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:00:46,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,205 INFO L138 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1055 [2024-11-09 06:00:46,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:00:46,206 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:00:46,206 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:00:46,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:00:46,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,233 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,233 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,264 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,306 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,318 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,333 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:00:46,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:00:46,334 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:00:46,334 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:00:46,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (1/1) ... [2024-11-09 06:00:46,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 06:00:46,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:46,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 06:00:46,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 06:00:46,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:00:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 06:00:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 06:00:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 06:00:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 06:00:46,429 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 06:00:46,429 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 06:00:46,451 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 06:00:46,451 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 06:00:46,451 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 06:00:46,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 06:00:46,452 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 06:00:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 06:00:46,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 06:00:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 06:00:46,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 06:00:46,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 06:00:46,452 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 06:00:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 06:00:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 06:00:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 06:00:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 06:00:46,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 06:00:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:00:46,453 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 06:00:46,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 06:00:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 06:00:46,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 06:00:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:00:46,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:00:46,454 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 06:00:46,454 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 06:00:46,455 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-09 06:00:46,455 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-09 06:00:46,708 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:00:46,711 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:00:48,270 INFO L? ?]: Removed 131 outVars from TransFormulas that were not future-live. [2024-11-09 06:00:48,270 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:00:49,034 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:00:49,037 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-09 06:00:49,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:00:49 BoogieIcfgContainer [2024-11-09 06:00:49,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:00:49,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:00:49,041 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:00:49,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:00:49,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:00:45" (1/3) ... [2024-11-09 06:00:49,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2900e5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:00:49, skipping insertion in model container [2024-11-09 06:00:49,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:00:46" (2/3) ... [2024-11-09 06:00:49,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2900e5da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:00:49, skipping insertion in model container [2024-11-09 06:00:49,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:00:49" (3/3) ... [2024-11-09 06:00:49,048 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2024-11-09 06:00:49,069 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:00:49,069 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 06:00:49,144 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:00:49,151 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;@70205175, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:00:49,151 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 06:00:49,157 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) [2024-11-09 06:00:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 06:00:49,167 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:49,168 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] [2024-11-09 06:00:49,169 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:49,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1670120611, now seen corresponding path program 1 times [2024-11-09 06:00:49,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:49,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752810353] [2024-11-09 06:00:49,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:49,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:49,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752810353] [2024-11-09 06:00:49,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752810353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:49,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:49,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:00:49,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345975306] [2024-11-09 06:00:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:49,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:00:49,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:49,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:00:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:00:49,653 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 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) [2024-11-09 06:00:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:51,041 INFO L93 Difference]: Finished difference Result 977 states and 1430 transitions. [2024-11-09 06:00:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:00:51,044 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 [2024-11-09 06:00:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:51,062 INFO L225 Difference]: With dead ends: 977 [2024-11-09 06:00:51,063 INFO L226 Difference]: Without dead ends: 684 [2024-11-09 06:00:51,069 INFO L431 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 [2024-11-09 06:00:51,072 INFO L432 NwaCegarLoop]: 458 mSDtfsCounter, 1107 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:51,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 1201 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-09 06:00:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2024-11-09 06:00:51,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 613. [2024-11-09 06:00:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 453 states have (on average 1.3620309050772628) internal successors, (617), 458 states have internal predecessors, (617), 97 states have call successors, (97), 63 states have call predecessors, (97), 61 states have return successors, (108), 93 states have call predecessors, (108), 93 states have call successors, (108) [2024-11-09 06:00:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 822 transitions. [2024-11-09 06:00:51,250 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 822 transitions. Word has length 45 [2024-11-09 06:00:51,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:51,252 INFO L471 AbstractCegarLoop]: Abstraction has 613 states and 822 transitions. [2024-11-09 06:00:51,252 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) [2024-11-09 06:00:51,253 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 822 transitions. [2024-11-09 06:00:51,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 06:00:51,257 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:51,257 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] [2024-11-09 06:00:51,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:00:51,258 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:51,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:51,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1529973134, now seen corresponding path program 1 times [2024-11-09 06:00:51,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:51,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341366310] [2024-11-09 06:00:51,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:51,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:51,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:51,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:51,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341366310] [2024-11-09 06:00:51,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341366310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:51,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:51,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 06:00:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047943930] [2024-11-09 06:00:51,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:51,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:00:51,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:51,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:00:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 06:00:51,696 INFO L87 Difference]: Start difference. First operand 613 states and 822 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) [2024-11-09 06:00:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:53,016 INFO L93 Difference]: Finished difference Result 1374 states and 1769 transitions. [2024-11-09 06:00:53,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 06:00:53,017 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 [2024-11-09 06:00:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:53,025 INFO L225 Difference]: With dead ends: 1374 [2024-11-09 06:00:53,025 INFO L226 Difference]: Without dead ends: 971 [2024-11-09 06:00:53,029 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 [2024-11-09 06:00:53,030 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 561 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:53,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1219 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:00:53,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2024-11-09 06:00:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 942. [2024-11-09 06:00:53,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 676 states have (on average 1.3136094674556213) internal successors, (888), 682 states have internal predecessors, (888), 153 states have call successors, (153), 111 states have call predecessors, (153), 111 states have return successors, (182), 150 states have call predecessors, (182), 149 states have call successors, (182) [2024-11-09 06:00:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1223 transitions. [2024-11-09 06:00:53,179 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1223 transitions. Word has length 46 [2024-11-09 06:00:53,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:53,179 INFO L471 AbstractCegarLoop]: Abstraction has 942 states and 1223 transitions. [2024-11-09 06:00:53,180 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) [2024-11-09 06:00:53,181 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1223 transitions. [2024-11-09 06:00:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 06:00:53,183 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:53,183 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] [2024-11-09 06:00:53,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:00:53,183 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:53,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -411468318, now seen corresponding path program 1 times [2024-11-09 06:00:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:53,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765505578] [2024-11-09 06:00:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:53,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:53,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:53,248 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:53,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765505578] [2024-11-09 06:00:53,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765505578] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:53,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:53,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:00:53,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559514874] [2024-11-09 06:00:53,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:53,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:00:53,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:53,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:00:53,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:00:53,253 INFO L87 Difference]: Start difference. First operand 942 states and 1223 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) [2024-11-09 06:00:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:53,572 INFO L93 Difference]: Finished difference Result 1883 states and 2382 transitions. [2024-11-09 06:00:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:00:53,573 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 [2024-11-09 06:00:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:53,582 INFO L225 Difference]: With dead ends: 1883 [2024-11-09 06:00:53,583 INFO L226 Difference]: Without dead ends: 1201 [2024-11-09 06:00:53,586 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 [2024-11-09 06:00:53,590 INFO L432 NwaCegarLoop]: 342 mSDtfsCounter, 68 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:53,591 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 656 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:00:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2024-11-09 06:00:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1179. [2024-11-09 06:00:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 837 states have (on average 1.2927120669056154) internal successors, (1082), 843 states have internal predecessors, (1082), 195 states have call successors, (195), 149 states have call predecessors, (195), 145 states have return successors, (228), 188 states have call predecessors, (228), 191 states have call successors, (228) [2024-11-09 06:00:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1505 transitions. [2024-11-09 06:00:53,719 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1505 transitions. Word has length 47 [2024-11-09 06:00:53,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:53,720 INFO L471 AbstractCegarLoop]: Abstraction has 1179 states and 1505 transitions. [2024-11-09 06:00:53,720 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) [2024-11-09 06:00:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1505 transitions. [2024-11-09 06:00:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 06:00:53,726 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:53,726 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] [2024-11-09 06:00:53,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:00:53,729 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:53,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 702739879, now seen corresponding path program 1 times [2024-11-09 06:00:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:53,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906773697] [2024-11-09 06:00:53,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:53,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:53,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:00:53,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:53,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906773697] [2024-11-09 06:00:53,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906773697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:53,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:53,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:00:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803476917] [2024-11-09 06:00:53,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:53,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:00:53,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:53,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:00:53,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:00:53,818 INFO L87 Difference]: Start difference. First operand 1179 states and 1505 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) [2024-11-09 06:00:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:54,058 INFO L93 Difference]: Finished difference Result 1585 states and 1995 transitions. [2024-11-09 06:00:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:00:54,059 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 [2024-11-09 06:00:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:54,065 INFO L225 Difference]: With dead ends: 1585 [2024-11-09 06:00:54,065 INFO L226 Difference]: Without dead ends: 1030 [2024-11-09 06:00:54,067 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 [2024-11-09 06:00:54,068 INFO L432 NwaCegarLoop]: 343 mSDtfsCounter, 368 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:54,069 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 405 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:00:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2024-11-09 06:00:54,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 824. [2024-11-09 06:00:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 601 states have (on average 1.2961730449251248) internal successors, (779), 606 states have internal predecessors, (779), 132 states have call successors, (132), 95 states have call predecessors, (132), 89 states have return successors, (136), 124 states have call predecessors, (136), 128 states have call successors, (136) [2024-11-09 06:00:54,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1047 transitions. [2024-11-09 06:00:54,141 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1047 transitions. Word has length 53 [2024-11-09 06:00:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:54,143 INFO L471 AbstractCegarLoop]: Abstraction has 824 states and 1047 transitions. [2024-11-09 06:00:54,143 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) [2024-11-09 06:00:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1047 transitions. [2024-11-09 06:00:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 06:00:54,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:54,145 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] [2024-11-09 06:00:54,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:00:54,146 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:54,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:54,147 INFO L85 PathProgramCache]: Analyzing trace with hash -2092789233, now seen corresponding path program 1 times [2024-11-09 06:00:54,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:54,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348369561] [2024-11-09 06:00:54,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:54,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:54,268 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:54,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348369561] [2024-11-09 06:00:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348369561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:00:54,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:00:54,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 06:00:54,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358884458] [2024-11-09 06:00:54,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:00:54,270 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 06:00:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:00:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 06:00:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 06:00:54,271 INFO L87 Difference]: Start difference. First operand 824 states and 1047 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) [2024-11-09 06:00:54,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:00:54,812 INFO L93 Difference]: Finished difference Result 1079 states and 1348 transitions. [2024-11-09 06:00:54,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 06:00:54,813 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 [2024-11-09 06:00:54,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:00:54,820 INFO L225 Difference]: With dead ends: 1079 [2024-11-09 06:00:54,820 INFO L226 Difference]: Without dead ends: 1076 [2024-11-09 06:00:54,821 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 [2024-11-09 06:00:54,822 INFO L432 NwaCegarLoop]: 338 mSDtfsCounter, 671 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:00:54,823 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 381 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:00:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-11-09 06:00:54,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 823. [2024-11-09 06:00:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823 states, 601 states have (on average 1.286189683860233) internal successors, (773), 605 states have internal predecessors, (773), 131 states have call successors, (131), 95 states have call predecessors, (131), 89 states have return successors, (136), 124 states have call predecessors, (136), 128 states have call successors, (136) [2024-11-09 06:00:54,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823 states to 823 states and 1040 transitions. [2024-11-09 06:00:54,933 INFO L78 Accepts]: Start accepts. Automaton has 823 states and 1040 transitions. Word has length 54 [2024-11-09 06:00:54,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:00:54,934 INFO L471 AbstractCegarLoop]: Abstraction has 823 states and 1040 transitions. [2024-11-09 06:00:54,934 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) [2024-11-09 06:00:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 823 states and 1040 transitions. [2024-11-09 06:00:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 06:00:54,936 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:00:54,936 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] [2024-11-09 06:00:54,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:00:54,937 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:00:54,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:00:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash -453416406, now seen corresponding path program 1 times [2024-11-09 06:00:54,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:00:54,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647034573] [2024-11-09 06:00:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:54,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:00:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:55,169 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:00:55,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647034573] [2024-11-09 06:00:55,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647034573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:00:55,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783097066] [2024-11-09 06:00:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:00:55,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:00:55,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:00:55,175 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:00:55,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 06:00:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:00:55,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:00:55,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:00:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:55,760 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:00:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:00:55,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783097066] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:00:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2137665565] [2024-11-09 06:00:55,906 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 06:00:55,906 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:00:55,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:00:55,915 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:00:55,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:01:05,031 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2024-11-09 06:01:05,165 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 207 for LOIs [2024-11-09 06:01:05,307 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 215 for LOIs [2024-11-09 06:01:07,083 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 211 for LOIs [2024-11-09 06:01:07,465 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 211 for LOIs [2024-11-09 06:01:07,881 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 211 for LOIs [2024-11-09 06:01:08,021 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 218 for LOIs [2024-11-09 06:01:08,138 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:01:38,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [2137665565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:01:38,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:01:38,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 06:01:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984206924] [2024-11-09 06:01:38,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:01:38,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 06:01:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:01:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 06:01:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 06:01:38,026 INFO L87 Difference]: Start difference. First operand 823 states and 1040 transitions. Second operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 06:02:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:03,300 INFO L93 Difference]: Finished difference Result 1462 states and 1796 transitions. [2024-11-09 06:02:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 06:02:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 55 [2024-11-09 06:02:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:03,307 INFO L225 Difference]: With dead ends: 1462 [2024-11-09 06:02:03,308 INFO L226 Difference]: Without dead ends: 849 [2024-11-09 06:02:03,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 06:02:03,311 INFO L432 NwaCegarLoop]: 318 mSDtfsCounter, 109 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 4065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:03,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 2044 Invalid, 4065 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [96 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2024-11-09 06:02:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2024-11-09 06:02:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 841. [2024-11-09 06:02:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 617 states have (on average 1.2820097244732578) internal successors, (791), 621 states have internal predecessors, (791), 132 states have call successors, (132), 96 states have call predecessors, (132), 90 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2024-11-09 06:02:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1060 transitions. [2024-11-09 06:02:03,435 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1060 transitions. Word has length 55 [2024-11-09 06:02:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:03,435 INFO L471 AbstractCegarLoop]: Abstraction has 841 states and 1060 transitions. [2024-11-09 06:02:03,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 7 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-11-09 06:02:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1060 transitions. [2024-11-09 06:02:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 06:02:03,438 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:03,438 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:03,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 06:02:03,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 06:02:03,644 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:03,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:03,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1872931270, now seen corresponding path program 1 times [2024-11-09 06:02:03,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112840801] [2024-11-09 06:02:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:02:03,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:03,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112840801] [2024-11-09 06:02:03,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112840801] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:03,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:02:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:02:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498114252] [2024-11-09 06:02:03,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:03,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:02:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:02:03,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:02:03,725 INFO L87 Difference]: Start difference. First operand 841 states and 1060 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:02:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:04,080 INFO L93 Difference]: Finished difference Result 1423 states and 1743 transitions. [2024-11-09 06:02:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:02:04,081 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2024-11-09 06:02:04,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:04,090 INFO L225 Difference]: With dead ends: 1423 [2024-11-09 06:02:04,090 INFO L226 Difference]: Without dead ends: 1050 [2024-11-09 06:02:04,092 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 [2024-11-09 06:02:04,093 INFO L432 NwaCegarLoop]: 364 mSDtfsCounter, 43 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:04,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 692 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:02:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2024-11-09 06:02:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 962. [2024-11-09 06:02:04,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 698 states have (on average 1.2664756446991403) internal successors, (884), 706 states have internal predecessors, (884), 154 states have call successors, (154), 118 states have call predecessors, (154), 108 states have return successors, (159), 139 states have call predecessors, (159), 151 states have call successors, (159) [2024-11-09 06:02:04,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1197 transitions. [2024-11-09 06:02:04,295 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1197 transitions. Word has length 61 [2024-11-09 06:02:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:04,296 INFO L471 AbstractCegarLoop]: Abstraction has 962 states and 1197 transitions. [2024-11-09 06:02:04,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-09 06:02:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1197 transitions. [2024-11-09 06:02:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-09 06:02:04,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:04,298 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:04,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:02:04,299 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:04,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1187265502, now seen corresponding path program 1 times [2024-11-09 06:02:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:04,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395500743] [2024-11-09 06:02:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:04,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:04,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:02:04,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395500743] [2024-11-09 06:02:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395500743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:04,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:02:04,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:02:04,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526946141] [2024-11-09 06:02:04,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:04,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 06:02:04,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 06:02:04,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 06:02:04,533 INFO L87 Difference]: Start difference. First operand 962 states and 1197 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2024-11-09 06:02:06,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:06,040 INFO L93 Difference]: Finished difference Result 1915 states and 2737 transitions. [2024-11-09 06:02:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:02:06,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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 68 [2024-11-09 06:02:06,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:06,054 INFO L225 Difference]: With dead ends: 1915 [2024-11-09 06:02:06,054 INFO L226 Difference]: Without dead ends: 1716 [2024-11-09 06:02:06,058 INFO L431 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 [2024-11-09 06:02:06,059 INFO L432 NwaCegarLoop]: 561 mSDtfsCounter, 1525 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 1468 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:06,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 1468 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-09 06:02:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2024-11-09 06:02:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1703. [2024-11-09 06:02:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1330 states have (on average 1.3714285714285714) internal successors, (1824), 1341 states have internal predecessors, (1824), 239 states have call successors, (239), 142 states have call predecessors, (239), 132 states have return successors, (306), 221 states have call predecessors, (306), 236 states have call successors, (306) [2024-11-09 06:02:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2369 transitions. [2024-11-09 06:02:06,347 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2369 transitions. Word has length 68 [2024-11-09 06:02:06,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:06,348 INFO L471 AbstractCegarLoop]: Abstraction has 1703 states and 2369 transitions. [2024-11-09 06:02:06,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 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) [2024-11-09 06:02:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2369 transitions. [2024-11-09 06:02:06,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 06:02:06,354 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:06,354 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:06,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 06:02:06,355 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:06,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash 569810331, now seen corresponding path program 1 times [2024-11-09 06:02:06,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:06,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71593042] [2024-11-09 06:02:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 06:02:06,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71593042] [2024-11-09 06:02:06,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71593042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:06,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755928875] [2024-11-09 06:02:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:06,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:06,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:06,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:06,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 06:02:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:07,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 06:02:07,175 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:02:07,268 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:02:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755928875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:02:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 06:02:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395053077] [2024-11-09 06:02:07,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:07,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:02:07,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:07,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:02:07,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:02:07,273 INFO L87 Difference]: Start difference. First operand 1703 states and 2369 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:02:07,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:07,913 INFO L93 Difference]: Finished difference Result 2250 states and 3020 transitions. [2024-11-09 06:02:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:02:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2024-11-09 06:02:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:07,924 INFO L225 Difference]: With dead ends: 2250 [2024-11-09 06:02:07,925 INFO L226 Difference]: Without dead ends: 1498 [2024-11-09 06:02:07,927 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-09 06:02:07,931 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 324 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:07,932 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 1377 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 06:02:07,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2024-11-09 06:02:08,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1475. [2024-11-09 06:02:08,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1188 states have (on average 1.3973063973063973) internal successors, (1660), 1197 states have internal predecessors, (1660), 191 states have call successors, (191), 100 states have call predecessors, (191), 94 states have return successors, (254), 179 states have call predecessors, (254), 188 states have call successors, (254) [2024-11-09 06:02:08,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 2105 transitions. [2024-11-09 06:02:08,169 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 2105 transitions. Word has length 102 [2024-11-09 06:02:08,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:08,171 INFO L471 AbstractCegarLoop]: Abstraction has 1475 states and 2105 transitions. [2024-11-09 06:02:08,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:02:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 2105 transitions. [2024-11-09 06:02:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 06:02:08,175 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:08,175 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:08,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 06:02:08,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-09 06:02:08,379 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:08,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:08,380 INFO L85 PathProgramCache]: Analyzing trace with hash 625494246, now seen corresponding path program 1 times [2024-11-09 06:02:08,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:08,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909186901] [2024-11-09 06:02:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:08,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 06:02:08,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909186901] [2024-11-09 06:02:08,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909186901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:08,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134039661] [2024-11-09 06:02:08,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:08,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:08,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:08,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:08,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 06:02:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:08,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 06:02:08,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:02:08,943 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:02:08,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134039661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:02:08,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:02:08,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-09 06:02:08,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528933206] [2024-11-09 06:02:08,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:02:08,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:02:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:02:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:02:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:02:08,947 INFO L87 Difference]: Start difference. First operand 1475 states and 2105 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:02:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:02:09,317 INFO L93 Difference]: Finished difference Result 1774 states and 2463 transitions. [2024-11-09 06:02:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:02:09,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-09 06:02:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:02:09,339 INFO L225 Difference]: With dead ends: 1774 [2024-11-09 06:02:09,339 INFO L226 Difference]: Without dead ends: 1324 [2024-11-09 06:02:09,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:02:09,343 INFO L432 NwaCegarLoop]: 366 mSDtfsCounter, 53 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:02:09,343 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 677 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:02:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2024-11-09 06:02:09,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 1208. [2024-11-09 06:02:09,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 998 states have (on average 1.4298597194388778) internal successors, (1427), 1005 states have internal predecessors, (1427), 149 states have call successors, (149), 61 states have call predecessors, (149), 59 states have return successors, (208), 143 states have call predecessors, (208), 146 states have call successors, (208) [2024-11-09 06:02:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1784 transitions. [2024-11-09 06:02:09,536 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1784 transitions. Word has length 104 [2024-11-09 06:02:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:02:09,537 INFO L471 AbstractCegarLoop]: Abstraction has 1208 states and 1784 transitions. [2024-11-09 06:02:09,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:02:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1784 transitions. [2024-11-09 06:02:09,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 06:02:09,540 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:02:09,540 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:02:09,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 06:02:09,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:09,745 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:02:09,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:02:09,745 INFO L85 PathProgramCache]: Analyzing trace with hash 225503047, now seen corresponding path program 1 times [2024-11-09 06:02:09,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:02:09,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173409834] [2024-11-09 06:02:09,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:09,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:02:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:02:10,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:02:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173409834] [2024-11-09 06:02:10,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173409834] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:02:10,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007613701] [2024-11-09 06:02:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:02:10,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:02:10,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:02:10,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:02:10,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 06:02:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:02:10,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 06:02:10,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:02:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:02:10,715 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:02:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-09 06:02:10,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007613701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:02:10,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1692367011] [2024-11-09 06:02:10,942 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 06:02:10,942 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:02:10,943 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:02:10,946 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:02:10,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:02:42,568 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 241 for LOIs [2024-11-09 06:02:43,281 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 212 for LOIs [2024-11-09 06:02:44,036 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 158 for LOIs [2024-11-09 06:02:44,106 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 226 for LOIs [2024-11-09 06:02:48,729 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 227 for LOIs [2024-11-09 06:02:53,011 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 172 for LOIs [2024-11-09 06:02:53,271 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 220 for LOIs [2024-11-09 06:02:53,888 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 231 for LOIs [2024-11-09 06:02:54,496 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:04:06,843 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39307#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_42 Int)) (and (= ~E_12~0 2) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_18| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_18| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_18| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_18| 2147483648)))) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_23|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 1) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 0)))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_42 0)) (and (not (= ~p_dw_st~0 0)) (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_23| Int)) (and (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_23|) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 1) (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_23| 0)))))) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~t12_pc~0 0) (= ~E_2~0 2) (not (= v_~q_free~0_42 1)) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t11_st~0 0) (<= v_~q_free~0_42 1) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (= ~t1_i~0 0))) (= ~c_dr_st~0 1))' at error location [2024-11-09 06:04:06,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:04:06,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:04:06,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 06:04:06,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124619373] [2024-11-09 06:04:06,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:04:06,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 06:04:06,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:06,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 06:04:06,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 06:04:06,847 INFO L87 Difference]: Start difference. First operand 1208 states and 1784 transitions. Second operand has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-09 06:04:11,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:11,137 INFO L93 Difference]: Finished difference Result 2148 states and 2871 transitions. [2024-11-09 06:04:11,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 06:04:11,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) Word has length 104 [2024-11-09 06:04:11,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:11,148 INFO L225 Difference]: With dead ends: 2148 [2024-11-09 06:04:11,148 INFO L226 Difference]: Without dead ends: 1966 [2024-11-09 06:04:11,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 74.6s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 06:04:11,156 INFO L432 NwaCegarLoop]: 305 mSDtfsCounter, 1533 mSDsluCounter, 1820 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1538 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:11,156 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1538 Valid, 2125 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-09 06:04:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2024-11-09 06:04:11,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1603. [2024-11-09 06:04:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1283 states have (on average 1.373343725643024) internal successors, (1762), 1290 states have internal predecessors, (1762), 207 states have call successors, (207), 113 states have call predecessors, (207), 111 states have return successors, (266), 201 states have call predecessors, (266), 204 states have call successors, (266) [2024-11-09 06:04:11,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2235 transitions. [2024-11-09 06:04:11,429 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2235 transitions. Word has length 104 [2024-11-09 06:04:11,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:11,429 INFO L471 AbstractCegarLoop]: Abstraction has 1603 states and 2235 transitions. [2024-11-09 06:04:11,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 states have internal predecessors, (158), 9 states have call successors, (42), 5 states have call predecessors, (42), 5 states have return successors, (41), 10 states have call predecessors, (41), 9 states have call successors, (41) [2024-11-09 06:04:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2235 transitions. [2024-11-09 06:04:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 06:04:11,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:11,433 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:11,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 06:04:11,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:11,634 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:11,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:11,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1000647617, now seen corresponding path program 1 times [2024-11-09 06:04:11,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:11,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826369435] [2024-11-09 06:04:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:11,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:04:11,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:11,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826369435] [2024-11-09 06:04:11,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826369435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:11,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:11,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:04:11,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565913429] [2024-11-09 06:04:11,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:11,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:04:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:04:11,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:04:11,709 INFO L87 Difference]: Start difference. First operand 1603 states and 2235 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-09 06:04:12,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:12,121 INFO L93 Difference]: Finished difference Result 2102 states and 2807 transitions. [2024-11-09 06:04:12,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:04:12,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 108 [2024-11-09 06:04:12,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:12,131 INFO L225 Difference]: With dead ends: 2102 [2024-11-09 06:04:12,131 INFO L226 Difference]: Without dead ends: 1593 [2024-11-09 06:04:12,133 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 [2024-11-09 06:04:12,134 INFO L432 NwaCegarLoop]: 369 mSDtfsCounter, 370 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:12,134 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 436 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 06:04:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2024-11-09 06:04:12,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1584. [2024-11-09 06:04:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1266 states have (on average 1.3665086887835702) internal successors, (1730), 1273 states have internal predecessors, (1730), 206 states have call successors, (206), 112 states have call predecessors, (206), 110 states have return successors, (265), 200 states have call predecessors, (265), 203 states have call successors, (265) [2024-11-09 06:04:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 2201 transitions. [2024-11-09 06:04:12,397 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 2201 transitions. Word has length 108 [2024-11-09 06:04:12,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:12,398 INFO L471 AbstractCegarLoop]: Abstraction has 1584 states and 2201 transitions. [2024-11-09 06:04:12,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2024-11-09 06:04:12,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 2201 transitions. [2024-11-09 06:04:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 06:04:12,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:12,402 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:12,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 06:04:12,403 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:12,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 281700837, now seen corresponding path program 1 times [2024-11-09 06:04:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562867498] [2024-11-09 06:04:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-09 06:04:12,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:12,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562867498] [2024-11-09 06:04:12,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562867498] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:12,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708565891] [2024-11-09 06:04:12,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:12,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:12,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:12,620 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:12,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 06:04:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:12,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 06:04:12,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 06:04:12,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:04:12,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708565891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:12,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:04:12,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 06:04:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046478170] [2024-11-09 06:04:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:12,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:04:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:04:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 06:04:12,882 INFO L87 Difference]: Start difference. First operand 1584 states and 2201 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:04:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:13,474 INFO L93 Difference]: Finished difference Result 2104 states and 2795 transitions. [2024-11-09 06:04:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 06:04:13,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2024-11-09 06:04:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:13,484 INFO L225 Difference]: With dead ends: 2104 [2024-11-09 06:04:13,484 INFO L226 Difference]: Without dead ends: 1555 [2024-11-09 06:04:13,486 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-09 06:04:13,488 INFO L432 NwaCegarLoop]: 358 mSDtfsCounter, 47 mSDsluCounter, 1059 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:13,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1417 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 06:04:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2024-11-09 06:04:13,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1495. [2024-11-09 06:04:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1205 states have (on average 1.3775933609958506) internal successors, (1660), 1212 states have internal predecessors, (1660), 191 states have call successors, (191), 99 states have call predecessors, (191), 97 states have return successors, (250), 185 states have call predecessors, (250), 188 states have call successors, (250) [2024-11-09 06:04:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 2101 transitions. [2024-11-09 06:04:13,759 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 2101 transitions. Word has length 112 [2024-11-09 06:04:13,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:13,759 INFO L471 AbstractCegarLoop]: Abstraction has 1495 states and 2101 transitions. [2024-11-09 06:04:13,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-09 06:04:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 2101 transitions. [2024-11-09 06:04:13,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 06:04:13,762 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:13,763 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:13,786 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 06:04:13,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:13,968 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:13,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:13,968 INFO L85 PathProgramCache]: Analyzing trace with hash -891602474, now seen corresponding path program 1 times [2024-11-09 06:04:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:13,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435628940] [2024-11-09 06:04:13,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:13,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-09 06:04:14,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:14,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435628940] [2024-11-09 06:04:14,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435628940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:14,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:14,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:04:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718134203] [2024-11-09 06:04:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:14,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:04:14,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:04:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:04:14,159 INFO L87 Difference]: Start difference. First operand 1495 states and 2101 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 06:04:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:14,683 INFO L93 Difference]: Finished difference Result 2244 states and 2946 transitions. [2024-11-09 06:04:14,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 06:04:14,684 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2024-11-09 06:04:14,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:14,691 INFO L225 Difference]: With dead ends: 2244 [2024-11-09 06:04:14,691 INFO L226 Difference]: Without dead ends: 1787 [2024-11-09 06:04:14,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 06:04:14,693 INFO L432 NwaCegarLoop]: 363 mSDtfsCounter, 359 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 1513 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:14,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 1513 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:04:14,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2024-11-09 06:04:15,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1753. [2024-11-09 06:04:15,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1367 states have (on average 1.346013167520117) internal successors, (1840), 1380 states have internal predecessors, (1840), 239 states have call successors, (239), 141 states have call predecessors, (239), 145 states have return successors, (310), 233 states have call predecessors, (310), 236 states have call successors, (310) [2024-11-09 06:04:15,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2389 transitions. [2024-11-09 06:04:15,018 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2389 transitions. Word has length 113 [2024-11-09 06:04:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:15,019 INFO L471 AbstractCegarLoop]: Abstraction has 1753 states and 2389 transitions. [2024-11-09 06:04:15,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2024-11-09 06:04:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2389 transitions. [2024-11-09 06:04:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 06:04:15,022 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:15,022 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:15,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 06:04:15,023 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:15,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -823347677, now seen corresponding path program 1 times [2024-11-09 06:04:15,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:15,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522702849] [2024-11-09 06:04:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:15,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:04:15,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522702849] [2024-11-09 06:04:15,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522702849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:04:15,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:04:15,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-11-09 06:04:15,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114519526] [2024-11-09 06:04:15,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:04:15,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 06:04:15,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:04:15,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 06:04:15,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 06:04:15,333 INFO L87 Difference]: Start difference. First operand 1753 states and 2389 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 06:04:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:04:16,759 INFO L93 Difference]: Finished difference Result 2432 states and 3152 transitions. [2024-11-09 06:04:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-09 06:04:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2024-11-09 06:04:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:04:16,770 INFO L225 Difference]: With dead ends: 2432 [2024-11-09 06:04:16,770 INFO L226 Difference]: Without dead ends: 1717 [2024-11-09 06:04:16,773 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-11-09 06:04:16,774 INFO L432 NwaCegarLoop]: 250 mSDtfsCounter, 1121 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1149 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:04:16,774 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1149 Valid, 1119 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:04:16,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1717 states. [2024-11-09 06:04:17,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1717 to 1697. [2024-11-09 06:04:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1331 states have (on average 1.3493613824192336) internal successors, (1796), 1348 states have internal predecessors, (1796), 224 states have call successors, (224), 129 states have call predecessors, (224), 140 states have return successors, (301), 221 states have call predecessors, (301), 221 states have call successors, (301) [2024-11-09 06:04:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 2321 transitions. [2024-11-09 06:04:17,136 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 2321 transitions. Word has length 114 [2024-11-09 06:04:17,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:04:17,137 INFO L471 AbstractCegarLoop]: Abstraction has 1697 states and 2321 transitions. [2024-11-09 06:04:17,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-09 06:04:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 2321 transitions. [2024-11-09 06:04:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 06:04:17,140 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:04:17,140 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:04:17,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 06:04:17,140 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:04:17,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:04:17,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1125251676, now seen corresponding path program 1 times [2024-11-09 06:04:17,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:04:17,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409051468] [2024-11-09 06:04:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:17,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:04:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-09 06:04:18,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:04:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409051468] [2024-11-09 06:04:18,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409051468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:04:18,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975563822] [2024-11-09 06:04:18,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:04:18,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:04:18,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:04:18,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:04:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 06:04:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:04:18,585 INFO L255 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 06:04:18,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:04:19,694 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:04:19,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:04:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 06:04:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975563822] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:04:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689637370] [2024-11-09 06:04:21,616 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 06:04:21,616 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:04:21,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:04:21,617 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:04:21,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:05:22,512 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 260 for LOIs [2024-11-09 06:05:23,076 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 06:05:23,078 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 06:05:23,081 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 224 for LOIs [2024-11-09 06:05:25,136 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 225 for LOIs [2024-11-09 06:05:27,035 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 28 for LOIs [2024-11-09 06:05:27,077 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 218 for LOIs [2024-11-09 06:05:27,409 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 229 for LOIs [2024-11-09 06:05:27,775 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:05:50,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '66842#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~p_last_write~0))' at error location [2024-11-09 06:05:50,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:05:50,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:05:50,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 53 [2024-11-09 06:05:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866385804] [2024-11-09 06:05:50,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:05:50,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-09 06:05:50,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:05:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-09 06:05:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=9690, Unknown=0, NotChecked=0, Total=10506 [2024-11-09 06:05:50,135 INFO L87 Difference]: Start difference. First operand 1697 states and 2321 transitions. Second operand has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-09 06:06:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:11,241 INFO L93 Difference]: Finished difference Result 3532 states and 4463 transitions. [2024-11-09 06:06:11,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2024-11-09 06:06:11,242 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) Word has length 114 [2024-11-09 06:06:11,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:11,254 INFO L225 Difference]: With dead ends: 3532 [2024-11-09 06:06:11,254 INFO L226 Difference]: Without dead ends: 2870 [2024-11-09 06:06:11,281 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 297 SyntacticMatches, 6 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 48436 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=11478, Invalid=108584, Unknown=0, NotChecked=0, Total=120062 [2024-11-09 06:06:11,282 INFO L432 NwaCegarLoop]: 284 mSDtfsCounter, 5824 mSDsluCounter, 4618 mSDsCounter, 0 mSdLazyCounter, 6790 mSolverCounterSat, 2298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5825 SdHoareTripleChecker+Valid, 4902 SdHoareTripleChecker+Invalid, 9088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2298 IncrementalHoareTripleChecker+Valid, 6790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:11,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5825 Valid, 4902 Invalid, 9088 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2298 Valid, 6790 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-09 06:06:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2024-11-09 06:06:11,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 1868. [2024-11-09 06:06:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1446 states have (on average 1.3326417704011064) internal successors, (1927), 1465 states have internal predecessors, (1927), 250 states have call successors, (250), 150 states have call predecessors, (250), 170 states have return successors, (337), 254 states have call predecessors, (337), 247 states have call successors, (337) [2024-11-09 06:06:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 2514 transitions. [2024-11-09 06:06:11,794 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 2514 transitions. Word has length 114 [2024-11-09 06:06:11,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:11,794 INFO L471 AbstractCegarLoop]: Abstraction has 1868 states and 2514 transitions. [2024-11-09 06:06:11,795 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-09 06:06:11,795 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 2514 transitions. [2024-11-09 06:06:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 06:06:11,798 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:11,798 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:11,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 06:06:11,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 06:06:11,999 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:06:11,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:12,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1802086775, now seen corresponding path program 1 times [2024-11-09 06:06:12,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:12,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89599282] [2024-11-09 06:06:12,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:12,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:06:12,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:12,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89599282] [2024-11-09 06:06:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89599282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390115671] [2024-11-09 06:06:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:12,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:12,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:12,442 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:12,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 06:06:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:12,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 06:06:12,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:12,756 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 06:06:12,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-09 06:06:13,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390115671] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:13,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:06:13,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 06:06:13,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684625453] [2024-11-09 06:06:13,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:06:13,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 06:06:13,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:06:13,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 06:06:13,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 06:06:13,019 INFO L87 Difference]: Start difference. First operand 1868 states and 2514 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 06:06:14,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:06:14,422 INFO L93 Difference]: Finished difference Result 3101 states and 3942 transitions. [2024-11-09 06:06:14,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 06:06:14,422 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2024-11-09 06:06:14,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:06:14,436 INFO L225 Difference]: With dead ends: 3101 [2024-11-09 06:06:14,436 INFO L226 Difference]: Without dead ends: 2270 [2024-11-09 06:06:14,440 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2024-11-09 06:06:14,440 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 560 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 06:06:14,441 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 617 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 06:06:14,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2024-11-09 06:06:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 2018. [2024-11-09 06:06:15,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 1536 states have (on average 1.3203125) internal successors, (2028), 1561 states have internal predecessors, (2028), 279 states have call successors, (279), 169 states have call predecessors, (279), 201 states have return successors, (396), 289 states have call predecessors, (396), 276 states have call successors, (396) [2024-11-09 06:06:15,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 2703 transitions. [2024-11-09 06:06:15,035 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 2703 transitions. Word has length 115 [2024-11-09 06:06:15,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:06:15,035 INFO L471 AbstractCegarLoop]: Abstraction has 2018 states and 2703 transitions. [2024-11-09 06:06:15,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 06:06:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 2703 transitions. [2024-11-09 06:06:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 06:06:15,039 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:06:15,039 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:06:15,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 06:06:15,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 06:06:15,244 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:06:15,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:06:15,244 INFO L85 PathProgramCache]: Analyzing trace with hash 256567969, now seen corresponding path program 1 times [2024-11-09 06:06:15,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:06:15,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883240213] [2024-11-09 06:06:15,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:15,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:06:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:16,128 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-09 06:06:16,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:06:16,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883240213] [2024-11-09 06:06:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883240213] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:06:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361671833] [2024-11-09 06:06:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:06:16,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:06:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:06:16,130 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:06:16,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 06:06:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:06:16,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-09 06:06:16,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:06:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 06:06:17,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:06:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 06:06:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361671833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 06:06:18,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834218225] [2024-11-09 06:06:18,920 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 06:06:18,920 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 06:06:18,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 06:06:18,921 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 06:06:18,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 06:06:50,663 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 261 for LOIs [2024-11-09 06:06:51,059 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 06:06:51,091 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 06:06:51,095 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2024-11-09 06:06:53,456 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 226 for LOIs [2024-11-09 06:06:55,622 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 06:06:55,659 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 219 for LOIs [2024-11-09 06:06:56,100 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 230 for LOIs [2024-11-09 06:06:56,475 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 06:07:21,767 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83680#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (exists ((v_~q_req_up~0_99 Int) (v_~q_free~0_100 Int)) (and (or (and (= v_~q_free~0_100 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_100 1) (= ~p_dw_st~0 0))) (or (exists ((v_~p_dw_st~0_138 Int) (v_~p_dw_pc~0_47 Int)) (and (or (and (= v_~p_dw_st~0_138 1) (= v_~p_dw_pc~0_47 0)) (and (<= ~q_buf_0~0 2147483647) (<= 0 (+ ~p_last_write~0 2147483648)) (= v_~p_dw_st~0_138 1) (= v_~q_req_up~0_99 1))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_69| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483648)))) (= v_~p_dw_pc~0_47 0)) (and (= v_~p_dw_pc~0_47 1) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_69| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_69| 2147483648)))))))) (= ~p_dw_st~0 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-09 06:07:21,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 06:07:21,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 06:07:21,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-09 06:07:21,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476574037] [2024-11-09 06:07:21,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 06:07:21,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-09 06:07:21,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-09 06:07:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 06:07:21,772 INFO L87 Difference]: Start difference. First operand 2018 states and 2703 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-09 06:07:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:31,689 INFO L93 Difference]: Finished difference Result 3857 states and 4860 transitions. [2024-11-09 06:07:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-09 06:07:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-09 06:07:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:31,708 INFO L225 Difference]: With dead ends: 3857 [2024-11-09 06:07:31,708 INFO L226 Difference]: Without dead ends: 2876 [2024-11-09 06:07:31,718 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 319 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 14109 ImplicationChecksByTransitivity, 30.2s TimeCoverageRelationStatistics Valid=3874, Invalid=32416, Unknown=0, NotChecked=0, Total=36290 [2024-11-09 06:07:31,719 INFO L432 NwaCegarLoop]: 271 mSDtfsCounter, 5463 mSDsluCounter, 3114 mSDsCounter, 0 mSdLazyCounter, 4836 mSolverCounterSat, 2483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5463 SdHoareTripleChecker+Valid, 3385 SdHoareTripleChecker+Invalid, 7319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2483 IncrementalHoareTripleChecker+Valid, 4836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:31,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5463 Valid, 3385 Invalid, 7319 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2483 Valid, 4836 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-11-09 06:07:31,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2024-11-09 06:07:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 1734. [2024-11-09 06:07:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1734 states, 1360 states have (on average 1.3455882352941178) internal successors, (1830), 1373 states have internal predecessors, (1830), 231 states have call successors, (231), 129 states have call predecessors, (231), 141 states have return successors, (312), 233 states have call predecessors, (312), 228 states have call successors, (312) [2024-11-09 06:07:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1734 states to 1734 states and 2373 transitions. [2024-11-09 06:07:32,263 INFO L78 Accepts]: Start accepts. Automaton has 1734 states and 2373 transitions. Word has length 124 [2024-11-09 06:07:32,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:32,264 INFO L471 AbstractCegarLoop]: Abstraction has 1734 states and 2373 transitions. [2024-11-09 06:07:32,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-09 06:07:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1734 states and 2373 transitions. [2024-11-09 06:07:32,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 06:07:32,269 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:32,269 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:32,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 06:07:32,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 06:07:32,474 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:32,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:32,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1668740950, now seen corresponding path program 1 times [2024-11-09 06:07:32,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:32,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744900353] [2024-11-09 06:07:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:32,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:07:32,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:32,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744900353] [2024-11-09 06:07:32,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744900353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540055388] [2024-11-09 06:07:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:32,724 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:32,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 06:07:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:32,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 06:07:32,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:33,098 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 06:07:33,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 06:07:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-09 06:07:33,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540055388] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:33,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 06:07:33,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 06:07:33,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523207862] [2024-11-09 06:07:33,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:33,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 06:07:33,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:33,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 06:07:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 06:07:33,375 INFO L87 Difference]: Start difference. First operand 1734 states and 2373 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 06:07:34,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:34,823 INFO L93 Difference]: Finished difference Result 2187 states and 2882 transitions. [2024-11-09 06:07:34,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 06:07:34,824 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2024-11-09 06:07:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:34,836 INFO L225 Difference]: With dead ends: 2187 [2024-11-09 06:07:34,836 INFO L226 Difference]: Without dead ends: 1490 [2024-11-09 06:07:34,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-09 06:07:34,840 INFO L432 NwaCegarLoop]: 263 mSDtfsCounter, 788 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:34,841 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 924 Invalid, 1318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-09 06:07:34,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-11-09 06:07:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 1460. [2024-11-09 06:07:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1156 states have (on average 1.3693771626297577) internal successors, (1583), 1169 states have internal predecessors, (1583), 195 states have call successors, (195), 99 states have call predecessors, (195), 107 states have return successors, (271), 193 states have call predecessors, (271), 192 states have call successors, (271) [2024-11-09 06:07:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 2049 transitions. [2024-11-09 06:07:35,234 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 2049 transitions. Word has length 125 [2024-11-09 06:07:35,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:35,235 INFO L471 AbstractCegarLoop]: Abstraction has 1460 states and 2049 transitions. [2024-11-09 06:07:35,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-09 06:07:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 2049 transitions. [2024-11-09 06:07:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:35,241 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:35,241 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:35,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 06:07:35,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:35,446 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:35,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:35,446 INFO L85 PathProgramCache]: Analyzing trace with hash -231018789, now seen corresponding path program 1 times [2024-11-09 06:07:35,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:35,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849136808] [2024-11-09 06:07:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:35,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:35,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849136808] [2024-11-09 06:07:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849136808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387645675] [2024-11-09 06:07:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:35,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:35,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:35,646 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:35,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 06:07:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:35,945 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:35,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-09 06:07:35,995 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387645675] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:35,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:35,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:35,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661078485] [2024-11-09 06:07:35,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:35,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:35,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:35,997 INFO L87 Difference]: Start difference. First operand 1460 states and 2049 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:36,654 INFO L93 Difference]: Finished difference Result 3324 states and 5091 transitions. [2024-11-09 06:07:36,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:07:36,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:07:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:36,668 INFO L225 Difference]: With dead ends: 3324 [2024-11-09 06:07:36,668 INFO L226 Difference]: Without dead ends: 2384 [2024-11-09 06:07:36,674 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:36,675 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 366 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:36,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:07:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2384 states. [2024-11-09 06:07:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2384 to 2375. [2024-11-09 06:07:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2375 states, 1939 states have (on average 1.4146467251160393) internal successors, (2743), 1955 states have internal predecessors, (2743), 297 states have call successors, (297), 129 states have call predecessors, (297), 137 states have return successors, (431), 292 states have call predecessors, (431), 294 states have call successors, (431) [2024-11-09 06:07:37,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 3471 transitions. [2024-11-09 06:07:37,146 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 3471 transitions. Word has length 138 [2024-11-09 06:07:37,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:37,146 INFO L471 AbstractCegarLoop]: Abstraction has 2375 states and 3471 transitions. [2024-11-09 06:07:37,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 3471 transitions. [2024-11-09 06:07:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:37,152 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:37,153 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:37,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 06:07:37,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:37,353 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:37,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -79741445, now seen corresponding path program 1 times [2024-11-09 06:07:37,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:37,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336611082] [2024-11-09 06:07:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:37,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:37,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336611082] [2024-11-09 06:07:37,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336611082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:37,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890521705] [2024-11-09 06:07:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:37,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:37,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:37,525 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:37,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 06:07:37,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:37,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:37,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:37,872 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 06:07:37,872 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:37,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890521705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:37,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:37,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:37,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044866327] [2024-11-09 06:07:37,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:37,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:37,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:37,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:37,874 INFO L87 Difference]: Start difference. First operand 2375 states and 3471 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:38,632 INFO L93 Difference]: Finished difference Result 6054 states and 9449 transitions. [2024-11-09 06:07:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:07:38,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:07:38,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:38,648 INFO L225 Difference]: With dead ends: 6054 [2024-11-09 06:07:38,649 INFO L226 Difference]: Without dead ends: 4199 [2024-11-09 06:07:38,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:38,660 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 357 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:38,661 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:07:38,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2024-11-09 06:07:39,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 4185. [2024-11-09 06:07:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4185 states, 3490 states have (on average 1.4421203438395416) internal successors, (5033), 3512 states have internal predecessors, (5033), 496 states have call successors, (496), 189 states have call predecessors, (496), 197 states have return successors, (742), 485 states have call predecessors, (742), 493 states have call successors, (742) [2024-11-09 06:07:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4185 states to 4185 states and 6271 transitions. [2024-11-09 06:07:39,258 INFO L78 Accepts]: Start accepts. Automaton has 4185 states and 6271 transitions. Word has length 138 [2024-11-09 06:07:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:39,259 INFO L471 AbstractCegarLoop]: Abstraction has 4185 states and 6271 transitions. [2024-11-09 06:07:39,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4185 states and 6271 transitions. [2024-11-09 06:07:39,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:39,270 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:39,270 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:39,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 06:07:39,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 06:07:39,471 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:39,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:39,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1745917221, now seen corresponding path program 1 times [2024-11-09 06:07:39,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:39,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675605807] [2024-11-09 06:07:39,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:39,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:39,705 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:39,706 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675605807] [2024-11-09 06:07:39,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675605807] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059829971] [2024-11-09 06:07:39,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:39,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:39,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:39,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:39,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 06:07:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:40,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:40,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-09 06:07:40,058 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:40,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059829971] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:40,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:40,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64896619] [2024-11-09 06:07:40,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:40,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:40,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:40,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:40,061 INFO L87 Difference]: Start difference. First operand 4185 states and 6271 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:41,638 INFO L93 Difference]: Finished difference Result 11454 states and 18024 transitions. [2024-11-09 06:07:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:07:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:07:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:41,680 INFO L225 Difference]: With dead ends: 11454 [2024-11-09 06:07:41,680 INFO L226 Difference]: Without dead ends: 7789 [2024-11-09 06:07:41,701 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:41,702 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 363 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:41,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:07:41,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7789 states. [2024-11-09 06:07:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7789 to 7765. [2024-11-09 06:07:42,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7765 states, 6562 states have (on average 1.455806156659555) internal successors, (9553), 6596 states have internal predecessors, (9553), 884 states have call successors, (884), 309 states have call predecessors, (884), 317 states have return successors, (1346), 861 states have call predecessors, (1346), 881 states have call successors, (1346) [2024-11-09 06:07:42,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7765 states to 7765 states and 11783 transitions. [2024-11-09 06:07:42,822 INFO L78 Accepts]: Start accepts. Automaton has 7765 states and 11783 transitions. Word has length 138 [2024-11-09 06:07:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:42,823 INFO L471 AbstractCegarLoop]: Abstraction has 7765 states and 11783 transitions. [2024-11-09 06:07:42,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 7765 states and 11783 transitions. [2024-11-09 06:07:42,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:42,841 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:42,841 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:42,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 06:07:43,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 06:07:43,046 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:43,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:43,047 INFO L85 PathProgramCache]: Analyzing trace with hash -868061253, now seen corresponding path program 1 times [2024-11-09 06:07:43,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:43,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011438640] [2024-11-09 06:07:43,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:43,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:43,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011438640] [2024-11-09 06:07:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011438640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:43,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769106544] [2024-11-09 06:07:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:43,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:43,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:43,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:43,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 06:07:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:43,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:43,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 06:07:43,609 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769106544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:43,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:43,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510776042] [2024-11-09 06:07:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:43,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:43,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:43,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:43,614 INFO L87 Difference]: Start difference. First operand 7765 states and 11783 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:45,293 INFO L93 Difference]: Finished difference Result 22134 states and 34892 transitions. [2024-11-09 06:07:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:07:45,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:07:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:45,371 INFO L225 Difference]: With dead ends: 22134 [2024-11-09 06:07:45,371 INFO L226 Difference]: Without dead ends: 14889 [2024-11-09 06:07:45,401 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:45,401 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 345 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:45,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:07:45,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14889 states. [2024-11-09 06:07:47,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14889 to 14845. [2024-11-09 06:07:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14845 states, 12646 states have (on average 1.4607781116558596) internal successors, (18473), 12704 states have internal predecessors, (18473), 1640 states have call successors, (1640), 549 states have call predecessors, (1640), 557 states have return successors, (2518), 1593 states have call predecessors, (2518), 1637 states have call successors, (2518) [2024-11-09 06:07:47,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14845 states to 14845 states and 22631 transitions. [2024-11-09 06:07:47,382 INFO L78 Accepts]: Start accepts. Automaton has 14845 states and 22631 transitions. Word has length 138 [2024-11-09 06:07:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:47,382 INFO L471 AbstractCegarLoop]: Abstraction has 14845 states and 22631 transitions. [2024-11-09 06:07:47,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 14845 states and 22631 transitions. [2024-11-09 06:07:47,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:47,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:47,409 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:47,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 06:07:47,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:47,610 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:47,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1965485211, now seen corresponding path program 1 times [2024-11-09 06:07:47,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:47,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92181915] [2024-11-09 06:07:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:47,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:47,768 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92181915] [2024-11-09 06:07:47,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92181915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:47,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419499030] [2024-11-09 06:07:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:47,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:47,772 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 06:07:48,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:48,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:48,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 06:07:48,149 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:48,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419499030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:48,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:48,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:48,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168196455] [2024-11-09 06:07:48,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:48,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:48,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:48,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:48,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:48,151 INFO L87 Difference]: Start difference. First operand 14845 states and 22631 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:07:51,286 INFO L93 Difference]: Finished difference Result 43254 states and 68064 transitions. [2024-11-09 06:07:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:07:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:07:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:07:51,422 INFO L225 Difference]: With dead ends: 43254 [2024-11-09 06:07:51,422 INFO L226 Difference]: Without dead ends: 28929 [2024-11-09 06:07:51,477 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:51,477 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 351 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:07:51,478 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:07:51,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28929 states. [2024-11-09 06:07:54,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28929 to 28845. [2024-11-09 06:07:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28845 states, 24694 states have (on average 1.4608001943792015) internal successors, (36073), 24800 states have internal predecessors, (36073), 3112 states have call successors, (3112), 1029 states have call predecessors, (3112), 1037 states have return successors, (4790), 3017 states have call predecessors, (4790), 3109 states have call successors, (4790) [2024-11-09 06:07:55,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28845 states to 28845 states and 43975 transitions. [2024-11-09 06:07:55,295 INFO L78 Accepts]: Start accepts. Automaton has 28845 states and 43975 transitions. Word has length 138 [2024-11-09 06:07:55,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:07:55,296 INFO L471 AbstractCegarLoop]: Abstraction has 28845 states and 43975 transitions. [2024-11-09 06:07:55,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:07:55,296 INFO L276 IsEmpty]: Start isEmpty. Operand 28845 states and 43975 transitions. [2024-11-09 06:07:55,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:07:55,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:07:55,352 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:07:55,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 06:07:55,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-09 06:07:55,554 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:07:55,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:07:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1322106501, now seen corresponding path program 1 times [2024-11-09 06:07:55,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:07:55,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750026883] [2024-11-09 06:07:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:07:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 06:07:55,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:07:55,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750026883] [2024-11-09 06:07:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750026883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 06:07:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710886280] [2024-11-09 06:07:55,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:07:55,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 06:07:55,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 06:07:55,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 06:07:55,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 06:07:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:07:56,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 06:07:56,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 06:07:56,150 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 06:07:56,150 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 06:07:56,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710886280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:07:56,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 06:07:56,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 06:07:56,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309836356] [2024-11-09 06:07:56,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:07:56,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:07:56,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:07:56,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:07:56,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:07:56,153 INFO L87 Difference]: Start difference. First operand 28845 states and 43975 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:08:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 06:08:02,535 INFO L93 Difference]: Finished difference Result 85014 states and 133280 transitions. [2024-11-09 06:08:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:08:02,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-09 06:08:02,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 06:08:02,829 INFO L225 Difference]: With dead ends: 85014 [2024-11-09 06:08:02,830 INFO L226 Difference]: Without dead ends: 56689 [2024-11-09 06:08:02,942 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:08:02,942 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 342 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 06:08:02,943 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 574 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 06:08:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56689 states. [2024-11-09 06:08:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56689 to 56525. [2024-11-09 06:08:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56525 states, 48550 states have (on average 1.4581462409886714) internal successors, (70793), 48752 states have internal predecessors, (70793), 5976 states have call successors, (5976), 1989 states have call predecessors, (5976), 1997 states have return successors, (9190), 5785 states have call predecessors, (9190), 5973 states have call successors, (9190) [2024-11-09 06:08:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56525 states to 56525 states and 85959 transitions. [2024-11-09 06:08:10,527 INFO L78 Accepts]: Start accepts. Automaton has 56525 states and 85959 transitions. Word has length 138 [2024-11-09 06:08:10,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 06:08:10,528 INFO L471 AbstractCegarLoop]: Abstraction has 56525 states and 85959 transitions. [2024-11-09 06:08:10,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-09 06:08:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 56525 states and 85959 transitions. [2024-11-09 06:08:10,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-09 06:08:10,578 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 06:08:10,578 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:08:10,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 06:08:10,778 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_501044d6-ee35-49b9-8995-754563ecbfc5/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 06:08:10,779 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 06:08:10,779 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:08:10,779 INFO L85 PathProgramCache]: Analyzing trace with hash 76148891, now seen corresponding path program 1 times [2024-11-09 06:08:10,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 06:08:10,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730703878] [2024-11-09 06:08:10,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:08:10,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:08:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:08:11,234 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-09 06:08:11,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 06:08:11,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730703878] [2024-11-09 06:08:11,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730703878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:08:11,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:08:11,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 06:08:11,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223214910] [2024-11-09 06:08:11,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:08:11,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:08:11,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 06:08:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:08:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:08:11,237 INFO L87 Difference]: Start difference. First operand 56525 states and 85959 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)