./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/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 d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:02:41,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:02:41,180 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:02:41,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:02:41,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:02:41,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:02:41,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:02:41,246 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:02:41,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:02:41,249 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:02:41,249 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:02:41,250 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:02:41,250 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:02:41,251 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:02:41,251 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:02:41,254 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:02:41,254 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:02:41,255 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:02:41,255 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:02:41,255 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:02:41,256 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:02:41,260 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:02:41,261 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:02:41,261 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:02:41,261 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:02:41,262 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:02:41,262 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:02:41,262 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:02:41,263 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:02:41,263 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:02:41,263 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:02:41,268 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:02:41,268 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:02:41,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:02:41,269 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:02:41,271 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:02:41,272 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:02:41,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:02:41,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:02:41,273 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:02:41,273 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:02:41,274 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:02:41,274 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:02:41,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:02:41,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:02:41,276 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:02:41,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:02:41,276 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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7b83251f9a608d2befdac3ab06beaba9889f30d8ab1cb865fc88ebdabcb52dd [2024-11-09 05:02:41,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:02:41,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:02:41,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:02:41,621 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:02:41,622 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:02:41,624 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c Unable to find full path for "g++" [2024-11-09 05:02:44,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:02:44,377 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:02:44,381 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2024-11-09 05:02:44,412 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/data/32a8bce29/0b7e5574780445039d4b0b3733dec6d9/FLAGd94c5ed69 [2024-11-09 05:02:44,436 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/data/32a8bce29/0b7e5574780445039d4b0b3733dec6d9 [2024-11-09 05:02:44,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:02:44,441 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:02:44,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:02:44,446 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:02:44,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:02:44,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:02:44" (1/1) ... [2024-11-09 05:02:44,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738f9bbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:44, skipping insertion in model container [2024-11-09 05:02:44,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:02:44" (1/1) ... [2024-11-09 05:02:44,530 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:02:44,746 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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2024-11-09 05:02:44,844 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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2024-11-09 05:02:44,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:02:44,961 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:02:44,978 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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[914,927] [2024-11-09 05:02:45,034 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_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.07.cil-2.c[7115,7128] [2024-11-09 05:02:45,136 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:02:45,169 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:02:45,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45 WrapperNode [2024-11-09 05:02:45,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:02:45,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:02:45,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:02:45,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:02:45,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,262 INFO L138 Inliner]: procedures = 67, calls = 79, calls flagged for inlining = 35, calls inlined = 35, statements flattened = 760 [2024-11-09 05:02:45,262 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:02:45,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:02:45,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:02:45,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:02:45,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,331 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:02:45,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:02:45,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:02:45,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:02:45,347 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (1/1) ... [2024-11-09 05:02:45,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:02:45,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:45,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:02:45,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:02:45,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:02:45,450 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:02:45,450 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:02:45,450 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 05:02:45,450 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 05:02:45,450 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 05:02:45,451 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 05:02:45,451 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 05:02:45,451 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 05:02:45,451 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 05:02:45,451 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 05:02:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 05:02:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 05:02:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 05:02:45,452 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 05:02:45,452 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 05:02:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 05:02:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 05:02:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 05:02:45,453 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 05:02:45,453 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 05:02:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 05:02:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 05:02:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:02:45,454 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 05:02:45,454 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 05:02:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 05:02:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 05:02:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:02:45,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:02:45,455 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 05:02:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 05:02:45,456 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-09 05:02:45,456 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-09 05:02:45,618 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:02:45,621 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:02:46,755 INFO L? ?]: Removed 101 outVars from TransFormulas that were not future-live. [2024-11-09 05:02:46,755 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:02:47,271 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:02:47,273 INFO L316 CfgBuilder]: Removed 14 assume(true) statements. [2024-11-09 05:02:47,273 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:02:47 BoogieIcfgContainer [2024-11-09 05:02:47,273 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:02:47,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:02:47,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:02:47,282 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:02:47,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:02:44" (1/3) ... [2024-11-09 05:02:47,283 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b08a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:02:47, skipping insertion in model container [2024-11-09 05:02:47,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:02:45" (2/3) ... [2024-11-09 05:02:47,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61b08a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:02:47, skipping insertion in model container [2024-11-09 05:02:47,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:02:47" (3/3) ... [2024-11-09 05:02:47,287 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.07.cil-2.c [2024-11-09 05:02:47,310 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:02:47,310 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:02:47,410 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:02:47,421 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;@1ba336c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:02:47,421 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:02:47,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 219 states, 164 states have (on average 1.5060975609756098) internal successors, (247), 172 states have internal predecessors, (247), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-09 05:02:47,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:02:47,439 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:47,440 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 05:02:47,440 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:47,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash 65549197, now seen corresponding path program 1 times [2024-11-09 05:02:47,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:47,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936239605] [2024-11-09 05:02:47,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:47,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:47,939 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 05:02:47,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:47,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936239605] [2024-11-09 05:02:47,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936239605] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:47,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:47,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:02:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283513523] [2024-11-09 05:02:47,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:47,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:02:47,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:47,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:02:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:02:47,998 INFO L87 Difference]: Start difference. First operand has 219 states, 164 states have (on average 1.5060975609756098) internal successors, (247), 172 states have internal predecessors, (247), 37 states have call successors, (37), 15 states have call predecessors, (37), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 05:02:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:48,544 INFO L93 Difference]: Finished difference Result 488 states and 713 transitions. [2024-11-09 05:02:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:02:48,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2024-11-09 05:02:48,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:48,561 INFO L225 Difference]: With dead ends: 488 [2024-11-09 05:02:48,561 INFO L226 Difference]: Without dead ends: 273 [2024-11-09 05:02:48,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:02:48,571 INFO L432 NwaCegarLoop]: 313 mSDtfsCounter, 367 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:48,573 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 536 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:02:48,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2024-11-09 05:02:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 266. [2024-11-09 05:02:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 199 states have (on average 1.407035175879397) internal successors, (280), 204 states have internal predecessors, (280), 45 states have call successors, (45), 22 states have call predecessors, (45), 20 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-11-09 05:02:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 366 transitions. [2024-11-09 05:02:48,658 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 366 transitions. Word has length 45 [2024-11-09 05:02:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:48,659 INFO L471 AbstractCegarLoop]: Abstraction has 266 states and 366 transitions. [2024-11-09 05:02:48,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 05:02:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 366 transitions. [2024-11-09 05:02:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:02:48,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:48,663 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 05:02:48,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:02:48,664 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:48,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 984523820, now seen corresponding path program 1 times [2024-11-09 05:02:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:48,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054320864] [2024-11-09 05:02:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:48,856 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 05:02:48,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:48,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054320864] [2024-11-09 05:02:48,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054320864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:48,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:48,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:02:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840270057] [2024-11-09 05:02:48,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:48,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:02:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:02:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:02:48,861 INFO L87 Difference]: Start difference. First operand 266 states and 366 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-09 05:02:49,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:49,818 INFO L93 Difference]: Finished difference Result 668 states and 869 transitions. [2024-11-09 05:02:49,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:02:49,819 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 05:02:49,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:49,824 INFO L225 Difference]: With dead ends: 668 [2024-11-09 05:02:49,825 INFO L226 Difference]: Without dead ends: 536 [2024-11-09 05:02:49,826 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:02:49,827 INFO L432 NwaCegarLoop]: 369 mSDtfsCounter, 776 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:49,828 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 933 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:02:49,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2024-11-09 05:02:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 452. [2024-11-09 05:02:49,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 331 states have (on average 1.3293051359516617) internal successors, (440), 337 states have internal predecessors, (440), 72 states have call successors, (72), 45 states have call predecessors, (72), 47 states have return successors, (72), 71 states have call predecessors, (72), 68 states have call successors, (72) [2024-11-09 05:02:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 584 transitions. [2024-11-09 05:02:49,885 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 584 transitions. Word has length 45 [2024-11-09 05:02:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:49,886 INFO L471 AbstractCegarLoop]: Abstraction has 452 states and 584 transitions. [2024-11-09 05:02:49,886 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 05:02:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 584 transitions. [2024-11-09 05:02:49,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:02:49,888 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:49,888 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 05:02:49,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:02:49,889 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:49,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2040151075, now seen corresponding path program 1 times [2024-11-09 05:02:49,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:49,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624743856] [2024-11-09 05:02:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:49,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:50,198 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 05:02:50,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:50,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624743856] [2024-11-09 05:02:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624743856] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:50,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:50,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:02:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832657982] [2024-11-09 05:02:50,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:50,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:02:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:02:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:02:50,202 INFO L87 Difference]: Start difference. First operand 452 states and 584 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 05:02:51,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:51,384 INFO L93 Difference]: Finished difference Result 968 states and 1200 transitions. [2024-11-09 05:02:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:02:51,385 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 05:02:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:51,391 INFO L225 Difference]: With dead ends: 968 [2024-11-09 05:02:51,392 INFO L226 Difference]: Without dead ends: 666 [2024-11-09 05:02:51,393 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:02:51,395 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 434 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:51,396 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 927 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:02:51,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2024-11-09 05:02:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 631. [2024-11-09 05:02:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 456 states have (on average 1.2982456140350878) internal successors, (592), 463 states have internal predecessors, (592), 99 states have call successors, (99), 68 states have call predecessors, (99), 74 states have return successors, (103), 101 states have call predecessors, (103), 95 states have call successors, (103) [2024-11-09 05:02:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 794 transitions. [2024-11-09 05:02:51,484 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 794 transitions. Word has length 46 [2024-11-09 05:02:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:51,485 INFO L471 AbstractCegarLoop]: Abstraction has 631 states and 794 transitions. [2024-11-09 05:02:51,486 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 05:02:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 794 transitions. [2024-11-09 05:02:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 05:02:51,488 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:51,488 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 05:02:51,489 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:02:51,489 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:51,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1406400660, now seen corresponding path program 1 times [2024-11-09 05:02:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:51,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507350184] [2024-11-09 05:02:51,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:51,564 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 05:02:51,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:51,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507350184] [2024-11-09 05:02:51,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507350184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:51,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:51,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:02:51,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345997733] [2024-11-09 05:02:51,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:51,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:02:51,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:51,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:02:51,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:51,570 INFO L87 Difference]: Start difference. First operand 631 states and 794 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 05:02:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:51,824 INFO L93 Difference]: Finished difference Result 1195 states and 1464 transitions. [2024-11-09 05:02:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:02:51,826 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 05:02:51,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:51,837 INFO L225 Difference]: With dead ends: 1195 [2024-11-09 05:02:51,837 INFO L226 Difference]: Without dead ends: 763 [2024-11-09 05:02:51,839 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 05:02:51,840 INFO L432 NwaCegarLoop]: 262 mSDtfsCounter, 67 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:51,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 493 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:02:51,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2024-11-09 05:02:51,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 658. [2024-11-09 05:02:51,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 479 states have (on average 1.2881002087682671) internal successors, (617), 486 states have internal predecessors, (617), 101 states have call successors, (101), 70 states have call predecessors, (101), 76 states have return successors, (105), 103 states have call predecessors, (105), 97 states have call successors, (105) [2024-11-09 05:02:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 823 transitions. [2024-11-09 05:02:51,950 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 823 transitions. Word has length 47 [2024-11-09 05:02:51,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:51,951 INFO L471 AbstractCegarLoop]: Abstraction has 658 states and 823 transitions. [2024-11-09 05:02:51,951 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 05:02:51,952 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 823 transitions. [2024-11-09 05:02:51,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:02:51,958 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:51,958 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 05:02:51,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:02:51,959 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:51,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash -959461200, now seen corresponding path program 1 times [2024-11-09 05:02:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:51,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436017088] [2024-11-09 05:02:51,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:51,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:52,074 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 05:02:52,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:52,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436017088] [2024-11-09 05:02:52,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436017088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:52,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:52,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:02:52,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526299245] [2024-11-09 05:02:52,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:52,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:02:52,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:02:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:02:52,082 INFO L87 Difference]: Start difference. First operand 658 states and 823 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 05:02:52,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:52,286 INFO L93 Difference]: Finished difference Result 848 states and 1044 transitions. [2024-11-09 05:02:52,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:02:52,288 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 05:02:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:52,292 INFO L225 Difference]: With dead ends: 848 [2024-11-09 05:02:52,293 INFO L226 Difference]: Without dead ends: 575 [2024-11-09 05:02:52,294 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 05:02:52,295 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 272 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:52,296 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 325 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:02:52,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2024-11-09 05:02:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 466. [2024-11-09 05:02:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 339 states have (on average 1.2831858407079646) internal successors, (435), 344 states have internal predecessors, (435), 77 states have call successors, (77), 50 states have call predecessors, (77), 48 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-09 05:02:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 585 transitions. [2024-11-09 05:02:52,367 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 585 transitions. Word has length 53 [2024-11-09 05:02:52,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:52,372 INFO L471 AbstractCegarLoop]: Abstraction has 466 states and 585 transitions. [2024-11-09 05:02:52,372 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 05:02:52,372 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 585 transitions. [2024-11-09 05:02:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 05:02:52,374 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:52,374 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 05:02:52,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:02:52,375 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:52,375 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:52,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1267373120, now seen corresponding path program 1 times [2024-11-09 05:02:52,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:52,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428487259] [2024-11-09 05:02:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:52,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:52,508 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 05:02:52,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:52,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428487259] [2024-11-09 05:02:52,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428487259] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:52,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:52,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:02:52,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491537256] [2024-11-09 05:02:52,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:52,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:02:52,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:02:52,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:02:52,516 INFO L87 Difference]: Start difference. First operand 466 states and 585 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 05:02:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:53,143 INFO L93 Difference]: Finished difference Result 569 states and 701 transitions. [2024-11-09 05:02:53,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:02:53,144 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 05:02:53,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:53,149 INFO L225 Difference]: With dead ends: 569 [2024-11-09 05:02:53,149 INFO L226 Difference]: Without dead ends: 566 [2024-11-09 05:02:53,150 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 05:02:53,151 INFO L432 NwaCegarLoop]: 256 mSDtfsCounter, 497 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:53,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 296 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 05:02:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2024-11-09 05:02:53,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 465. [2024-11-09 05:02:53,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 339 states have (on average 1.2743362831858407) internal successors, (432), 343 states have internal predecessors, (432), 76 states have call successors, (76), 50 states have call predecessors, (76), 48 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-11-09 05:02:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 581 transitions. [2024-11-09 05:02:53,260 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 581 transitions. Word has length 54 [2024-11-09 05:02:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:53,261 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 581 transitions. [2024-11-09 05:02:53,262 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 05:02:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 581 transitions. [2024-11-09 05:02:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:02:53,264 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:53,265 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] [2024-11-09 05:02:53,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:02:53,265 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:53,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1101248907, now seen corresponding path program 1 times [2024-11-09 05:02:53,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:53,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568619172] [2024-11-09 05:02:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:53,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:53,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:53,416 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 05:02:53,416 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:53,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568619172] [2024-11-09 05:02:53,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568619172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:02:53,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:02:53,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:02:53,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31384534] [2024-11-09 05:02:53,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:02:53,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:02:53,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:02:53,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:02:53,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:02:53,419 INFO L87 Difference]: Start difference. First operand 465 states and 581 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 05:02:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:02:54,545 INFO L93 Difference]: Finished difference Result 1118 states and 1611 transitions. [2024-11-09 05:02:54,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:02:54,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 53 [2024-11-09 05:02:54,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:02:54,555 INFO L225 Difference]: With dead ends: 1118 [2024-11-09 05:02:54,555 INFO L226 Difference]: Without dead ends: 979 [2024-11-09 05:02:54,556 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 05:02:54,558 INFO L432 NwaCegarLoop]: 400 mSDtfsCounter, 1028 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:02:54,561 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1029 Valid, 1011 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 05:02:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2024-11-09 05:02:54,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 966. [2024-11-09 05:02:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 751 states have (on average 1.374167776298269) internal successors, (1032), 758 states have internal predecessors, (1032), 141 states have call successors, (141), 74 states have call predecessors, (141), 72 states have return successors, (180), 135 states have call predecessors, (180), 138 states have call successors, (180) [2024-11-09 05:02:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1353 transitions. [2024-11-09 05:02:54,693 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1353 transitions. Word has length 53 [2024-11-09 05:02:54,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:02:54,693 INFO L471 AbstractCegarLoop]: Abstraction has 966 states and 1353 transitions. [2024-11-09 05:02:54,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 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 05:02:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1353 transitions. [2024-11-09 05:02:54,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 05:02:54,696 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:02:54,696 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 05:02:54,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:02:54,696 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:02:54,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:02:54,697 INFO L85 PathProgramCache]: Analyzing trace with hash 632768308, now seen corresponding path program 1 times [2024-11-09 05:02:54,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:02:54,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464859712] [2024-11-09 05:02:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:02:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:54,927 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 05:02:54,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:02:54,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464859712] [2024-11-09 05:02:54,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464859712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:02:54,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821997403] [2024-11-09 05:02:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:02:54,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:02:54,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:02:54,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:02:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:02:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:02:55,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:02:55,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:02:55,436 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 05:02:55,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:02:55,572 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 05:02:55,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821997403] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:02:55,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467785666] [2024-11-09 05:02:55,598 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 05:02:55,599 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:02:55,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:02:55,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:02:55,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:01,378 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 161 for LOIs [2024-11-09 05:03:01,440 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 157 for LOIs [2024-11-09 05:03:01,519 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2024-11-09 05:03:02,395 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 161 for LOIs [2024-11-09 05:03:02,594 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 161 for LOIs [2024-11-09 05:03:02,830 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 161 for LOIs [2024-11-09 05:03:02,934 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 168 for LOIs [2024-11-09 05:03:03,036 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:03:21,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1467785666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:21,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:03:21,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 05:03:21,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044219345] [2024-11-09 05:03:21,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:21,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:03:21,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:21,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:03:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:03:21,614 INFO L87 Difference]: Start difference. First operand 966 states and 1353 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 05:03:37,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:37,975 INFO L93 Difference]: Finished difference Result 1308 states and 1746 transitions. [2024-11-09 05:03:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:03:37,975 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 05:03:37,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:37,981 INFO L225 Difference]: With dead ends: 1308 [2024-11-09 05:03:37,981 INFO L226 Difference]: Without dead ends: 993 [2024-11-09 05:03:37,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:03:37,984 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 164 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 4123 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 4266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:37,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 2326 Invalid, 4266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [143 Valid, 4123 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-09 05:03:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2024-11-09 05:03:38,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 985. [2024-11-09 05:03:38,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 768 states have (on average 1.3697916666666667) internal successors, (1052), 775 states have internal predecessors, (1052), 142 states have call successors, (142), 75 states have call predecessors, (142), 73 states have return successors, (181), 136 states have call predecessors, (181), 139 states have call successors, (181) [2024-11-09 05:03:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1375 transitions. [2024-11-09 05:03:38,117 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 1375 transitions. Word has length 55 [2024-11-09 05:03:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:38,118 INFO L471 AbstractCegarLoop]: Abstraction has 985 states and 1375 transitions. [2024-11-09 05:03:38,118 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 05:03:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 1375 transitions. [2024-11-09 05:03:38,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 05:03:38,120 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:38,120 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 05:03:38,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:03:38,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-09 05:03:38,321 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:03:38,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:38,322 INFO L85 PathProgramCache]: Analyzing trace with hash 702613516, now seen corresponding path program 1 times [2024-11-09 05:03:38,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:38,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110458787] [2024-11-09 05:03:38,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:38,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:38,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:38,407 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 05:03:38,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:38,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110458787] [2024-11-09 05:03:38,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110458787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:38,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:03:38,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:03:38,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491135527] [2024-11-09 05:03:38,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:38,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:03:38,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:38,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:03:38,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:03:38,410 INFO L87 Difference]: Start difference. First operand 985 states and 1375 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 05:03:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:38,672 INFO L93 Difference]: Finished difference Result 1266 states and 1697 transitions. [2024-11-09 05:03:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:03:38,672 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 05:03:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:38,679 INFO L225 Difference]: With dead ends: 1266 [2024-11-09 05:03:38,679 INFO L226 Difference]: Without dead ends: 1097 [2024-11-09 05:03:38,680 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 05:03:38,681 INFO L432 NwaCegarLoop]: 283 mSDtfsCounter, 42 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:38,681 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 530 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:03:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2024-11-09 05:03:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 1020. [2024-11-09 05:03:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 797 states have (on average 1.3651191969887078) internal successors, (1088), 804 states have internal predecessors, (1088), 145 states have call successors, (145), 78 states have call predecessors, (145), 76 states have return successors, (184), 139 states have call predecessors, (184), 142 states have call successors, (184) [2024-11-09 05:03:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1417 transitions. [2024-11-09 05:03:38,831 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1417 transitions. Word has length 61 [2024-11-09 05:03:38,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:38,832 INFO L471 AbstractCegarLoop]: Abstraction has 1020 states and 1417 transitions. [2024-11-09 05:03:38,832 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 05:03:38,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1417 transitions. [2024-11-09 05:03:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 05:03:38,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:38,835 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 05:03:38,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 05:03:38,836 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:03:38,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:38,836 INFO L85 PathProgramCache]: Analyzing trace with hash 833434014, now seen corresponding path program 1 times [2024-11-09 05:03:38,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:38,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090637585] [2024-11-09 05:03:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:38,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:39,277 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 05:03:39,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090637585] [2024-11-09 05:03:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090637585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:39,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905574257] [2024-11-09 05:03:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:39,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:39,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:39,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:39,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:03:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:39,415 INFO L255 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:03:39,419 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:39,494 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 05:03:39,495 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:03:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905574257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:03:39,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:03:39,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 05:03:39,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179672935] [2024-11-09 05:03:39,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:03:39,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:03:39,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:03:39,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:03:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:03:39,499 INFO L87 Difference]: Start difference. First operand 1020 states and 1417 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 05:03:39,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:03:39,935 INFO L93 Difference]: Finished difference Result 1280 states and 1717 transitions. [2024-11-09 05:03:39,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:03:39,936 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 05:03:39,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:03:39,942 INFO L225 Difference]: With dead ends: 1280 [2024-11-09 05:03:39,942 INFO L226 Difference]: Without dead ends: 911 [2024-11-09 05:03:39,943 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 05:03:39,944 INFO L432 NwaCegarLoop]: 264 mSDtfsCounter, 229 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:03:39,944 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1003 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:03:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2024-11-09 05:03:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 907. [2024-11-09 05:03:40,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 722 states have (on average 1.3850415512465375) internal successors, (1000), 729 states have internal predecessors, (1000), 124 states have call successors, (124), 61 states have call predecessors, (124), 59 states have return successors, (163), 118 states have call predecessors, (163), 121 states have call successors, (163) [2024-11-09 05:03:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1287 transitions. [2024-11-09 05:03:40,080 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1287 transitions. Word has length 102 [2024-11-09 05:03:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:03:40,080 INFO L471 AbstractCegarLoop]: Abstraction has 907 states and 1287 transitions. [2024-11-09 05:03:40,081 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 05:03:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1287 transitions. [2024-11-09 05:03:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 05:03:40,083 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:03:40,084 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 05:03:40,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:03:40,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-09 05:03:40,288 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:03:40,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:03:40,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1281945961, now seen corresponding path program 1 times [2024-11-09 05:03:40,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:03:40,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104892251] [2024-11-09 05:03:40,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:40,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:03:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:40,509 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 05:03:40,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:03:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104892251] [2024-11-09 05:03:40,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104892251] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:03:40,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986841214] [2024-11-09 05:03:40,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:03:40,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:03:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:03:40,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:03:40,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:03:40,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:03:40,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:03:40,686 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:03:41,064 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 05:03:41,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:03:41,259 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 05:03:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986841214] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:03:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [908243431] [2024-11-09 05:03:41,263 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 05:03:41,263 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:03:41,264 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:03:41,264 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:03:41,264 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:03:56,066 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 191 for LOIs [2024-11-09 05:03:56,420 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 155 for LOIs [2024-11-09 05:03:56,691 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 108 for LOIs [2024-11-09 05:03:56,720 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 176 for LOIs [2024-11-09 05:03:58,597 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 177 for LOIs [2024-11-09 05:04:00,660 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 122 for LOIs [2024-11-09 05:04:00,841 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 170 for LOIs [2024-11-09 05:04:01,123 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 181 for LOIs [2024-11-09 05:04:01,562 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:04:35,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24802#(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_43 Int)) (and (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (not (= ~p_dw_st~0 0)) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (not (= v_~q_free~0_43 1)) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 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) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t2_i~0 0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= ~E_2~0 2) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (<= v_~q_free~0_43 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (= ~t1_i~0 0))) (= ~c_dr_st~0 1))' at error location [2024-11-09 05:04:35,344 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:04:35,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:04:35,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 05:04:35,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898699754] [2024-11-09 05:04:35,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:04:35,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:04:35,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:35,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:04:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 05:04:35,348 INFO L87 Difference]: Start difference. First operand 907 states and 1287 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 05:04:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:38,990 INFO L93 Difference]: Finished difference Result 1847 states and 2374 transitions. [2024-11-09 05:04:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 05:04:38,991 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 05:04:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:39,000 INFO L225 Difference]: With dead ends: 1847 [2024-11-09 05:04:39,000 INFO L226 Difference]: Without dead ends: 1665 [2024-11-09 05:04:39,005 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 274 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4738 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 05:04:39,006 INFO L432 NwaCegarLoop]: 253 mSDtfsCounter, 1264 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 2248 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:39,006 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 1858 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2248 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:04:39,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2024-11-09 05:04:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1302. [2024-11-09 05:04:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1007 states have (on average 1.3257199602780536) internal successors, (1335), 1014 states have internal predecessors, (1335), 182 states have call successors, (182), 113 states have call predecessors, (182), 111 states have return successors, (221), 176 states have call predecessors, (221), 179 states have call successors, (221) [2024-11-09 05:04:39,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1738 transitions. [2024-11-09 05:04:39,234 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1738 transitions. Word has length 104 [2024-11-09 05:04:39,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:39,235 INFO L471 AbstractCegarLoop]: Abstraction has 1302 states and 1738 transitions. [2024-11-09 05:04:39,235 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 05:04:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1738 transitions. [2024-11-09 05:04:39,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 05:04:39,238 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:39,238 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 05:04:39,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 05:04:39,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-09 05:04:39,442 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:39,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:39,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1844427937, now seen corresponding path program 1 times [2024-11-09 05:04:39,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:39,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184491918] [2024-11-09 05:04:39,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:39,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:39,499 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 05:04:39,499 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:39,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184491918] [2024-11-09 05:04:39,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184491918] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:39,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:39,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:04:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447151563] [2024-11-09 05:04:39,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:39,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:39,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:39,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:39,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:04:39,502 INFO L87 Difference]: Start difference. First operand 1302 states and 1738 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 05:04:39,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:39,787 INFO L93 Difference]: Finished difference Result 1801 states and 2310 transitions. [2024-11-09 05:04:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:39,787 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 05:04:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:39,795 INFO L225 Difference]: With dead ends: 1801 [2024-11-09 05:04:39,795 INFO L226 Difference]: Without dead ends: 1292 [2024-11-09 05:04:39,797 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 05:04:39,797 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 275 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:39,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 354 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:04:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2024-11-09 05:04:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1283. [2024-11-09 05:04:40,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 990 states have (on average 1.316161616161616) internal successors, (1303), 997 states have internal predecessors, (1303), 181 states have call successors, (181), 112 states have call predecessors, (181), 110 states have return successors, (220), 175 states have call predecessors, (220), 178 states have call successors, (220) [2024-11-09 05:04:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 1704 transitions. [2024-11-09 05:04:40,015 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 1704 transitions. Word has length 108 [2024-11-09 05:04:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:40,016 INFO L471 AbstractCegarLoop]: Abstraction has 1283 states and 1704 transitions. [2024-11-09 05:04:40,016 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 05:04:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 1704 transitions. [2024-11-09 05:04:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:04:40,019 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:40,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:40,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 05:04:40,020 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:40,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:40,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1180766785, now seen corresponding path program 1 times [2024-11-09 05:04:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591633685] [2024-11-09 05:04:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:40,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:40,146 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591633685] [2024-11-09 05:04:40,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591633685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:40,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53789294] [2024-11-09 05:04:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:40,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:40,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:40,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:40,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:04:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:40,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:40,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-09 05:04:40,349 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53789294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:40,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:40,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:40,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772708221] [2024-11-09 05:04:40,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:40,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:40,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:40,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:40,351 INFO L87 Difference]: Start difference. First operand 1283 states and 1704 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 05:04:40,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:40,674 INFO L93 Difference]: Finished difference Result 2547 states and 3711 transitions. [2024-11-09 05:04:40,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:40,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 103 [2024-11-09 05:04:40,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:40,686 INFO L225 Difference]: With dead ends: 2547 [2024-11-09 05:04:40,686 INFO L226 Difference]: Without dead ends: 1907 [2024-11-09 05:04:40,690 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 05:04:40,690 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 271 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:40,691 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 414 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:04:40,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2024-11-09 05:04:40,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1898. [2024-11-09 05:04:40,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1898 states, 1498 states have (on average 1.3604806408544727) internal successors, (2038), 1508 states have internal predecessors, (2038), 258 states have call successors, (258), 142 states have call predecessors, (258), 140 states have return successors, (335), 249 states have call predecessors, (335), 255 states have call successors, (335) [2024-11-09 05:04:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2631 transitions. [2024-11-09 05:04:40,948 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2631 transitions. Word has length 103 [2024-11-09 05:04:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:40,948 INFO L471 AbstractCegarLoop]: Abstraction has 1898 states and 2631 transitions. [2024-11-09 05:04:40,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 05:04:40,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2631 transitions. [2024-11-09 05:04:40,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:04:40,959 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:40,959 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:40,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:04:41,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:41,160 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:41,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash -704555645, now seen corresponding path program 1 times [2024-11-09 05:04:41,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:41,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072331714] [2024-11-09 05:04:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:41,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:41,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072331714] [2024-11-09 05:04:41,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072331714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:41,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813419384] [2024-11-09 05:04:41,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:41,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:41,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:41,283 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:41,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:04:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:41,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:41,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:41,526 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-09 05:04:41,526 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:41,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813419384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:41,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:41,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:41,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119978103] [2024-11-09 05:04:41,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:41,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:41,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:41,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:41,529 INFO L87 Difference]: Start difference. First operand 1898 states and 2631 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 05:04:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:41,991 INFO L93 Difference]: Finished difference Result 4377 states and 6539 transitions. [2024-11-09 05:04:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 103 [2024-11-09 05:04:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:42,008 INFO L225 Difference]: With dead ends: 4377 [2024-11-09 05:04:42,009 INFO L226 Difference]: Without dead ends: 3122 [2024-11-09 05:04:42,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 05:04:42,015 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 262 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:42,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 414 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:04:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2024-11-09 05:04:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 3108. [2024-11-09 05:04:42,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 2499 states have (on average 1.3917567026810724) internal successors, (3478), 2515 states have internal predecessors, (3478), 407 states have call successors, (407), 202 states have call predecessors, (407), 200 states have return successors, (556), 392 states have call predecessors, (556), 404 states have call successors, (556) [2024-11-09 05:04:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4441 transitions. [2024-11-09 05:04:42,425 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4441 transitions. Word has length 103 [2024-11-09 05:04:42,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:42,425 INFO L471 AbstractCegarLoop]: Abstraction has 3108 states and 4441 transitions. [2024-11-09 05:04:42,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 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 05:04:42,426 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4441 transitions. [2024-11-09 05:04:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:04:42,431 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:42,432 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:42,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:04:42,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:04:42,632 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:42,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:42,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1881538561, now seen corresponding path program 1 times [2024-11-09 05:04:42,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:42,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330634199] [2024-11-09 05:04:42,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:42,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:04:42,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330634199] [2024-11-09 05:04:42,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330634199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:42,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710937913] [2024-11-09 05:04:42,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:42,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:42,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:42,774 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:42,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:04:42,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:42,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:04:42,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:04:42,985 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710937913] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:42,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:42,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:04:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012018730] [2024-11-09 05:04:42,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:42,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:42,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:42,987 INFO L87 Difference]: Start difference. First operand 3108 states and 4441 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 05:04:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:43,531 INFO L93 Difference]: Finished difference Result 7977 states and 12054 transitions. [2024-11-09 05:04:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:43,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 103 [2024-11-09 05:04:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:43,561 INFO L225 Difference]: With dead ends: 7977 [2024-11-09 05:04:43,562 INFO L226 Difference]: Without dead ends: 5512 [2024-11-09 05:04:43,574 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 103 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 05:04:43,575 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 268 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:43,575 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 414 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:04:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5512 states. [2024-11-09 05:04:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5512 to 5488. [2024-11-09 05:04:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 4471 states have (on average 1.4086334153433235) internal successors, (6298), 4499 states have internal predecessors, (6298), 695 states have call successors, (695), 322 states have call predecessors, (695), 320 states have return successors, (980), 668 states have call predecessors, (980), 692 states have call successors, (980) [2024-11-09 05:04:44,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 7973 transitions. [2024-11-09 05:04:44,239 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 7973 transitions. Word has length 103 [2024-11-09 05:04:44,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:44,240 INFO L471 AbstractCegarLoop]: Abstraction has 5488 states and 7973 transitions. [2024-11-09 05:04:44,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 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 05:04:44,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 7973 transitions. [2024-11-09 05:04:44,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-09 05:04:44,249 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:44,249 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:44,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:04:44,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 05:04:44,450 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:44,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:44,450 INFO L85 PathProgramCache]: Analyzing trace with hash -873180161, now seen corresponding path program 1 times [2024-11-09 05:04:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:44,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487347177] [2024-11-09 05:04:44,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:44,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:44,551 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:04:44,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:44,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487347177] [2024-11-09 05:04:44,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487347177] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:44,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:44,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:04:44,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98926252] [2024-11-09 05:04:44,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:44,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:04:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:04:44,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:04:44,555 INFO L87 Difference]: Start difference. First operand 5488 states and 7973 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 05:04:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:45,331 INFO L93 Difference]: Finished difference Result 10532 states and 15820 transitions. [2024-11-09 05:04:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:04:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 103 [2024-11-09 05:04:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:45,366 INFO L225 Difference]: With dead ends: 10532 [2024-11-09 05:04:45,367 INFO L226 Difference]: Without dead ends: 6640 [2024-11-09 05:04:45,380 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 05:04:45,381 INFO L432 NwaCegarLoop]: 343 mSDtfsCounter, 90 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:45,381 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 599 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:04:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2024-11-09 05:04:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 6256. [2024-11-09 05:04:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6256 states, 5207 states have (on average 1.435375456116766) internal successors, (7474), 5235 states have internal predecessors, (7474), 711 states have call successors, (711), 338 states have call predecessors, (711), 336 states have return successors, (996), 684 states have call predecessors, (996), 708 states have call successors, (996) [2024-11-09 05:04:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6256 states to 6256 states and 9181 transitions. [2024-11-09 05:04:46,091 INFO L78 Accepts]: Start accepts. Automaton has 6256 states and 9181 transitions. Word has length 103 [2024-11-09 05:04:46,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:46,092 INFO L471 AbstractCegarLoop]: Abstraction has 6256 states and 9181 transitions. [2024-11-09 05:04:46,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 05:04:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 6256 states and 9181 transitions. [2024-11-09 05:04:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 05:04:46,102 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:46,102 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 05:04:46,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 05:04:46,103 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:46,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -282882107, now seen corresponding path program 1 times [2024-11-09 05:04:46,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:46,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284758323] [2024-11-09 05:04:46,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:46,344 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 05:04:46,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:46,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284758323] [2024-11-09 05:04:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284758323] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:46,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073682088] [2024-11-09 05:04:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:46,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:46,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:46,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:46,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:04:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:46,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:04:46,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:46,579 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 05:04:46,579 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:04:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073682088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:46,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:04:46,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 05:04:46,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126896783] [2024-11-09 05:04:46,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:46,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:04:46,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:46,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:04:46,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:04:46,582 INFO L87 Difference]: Start difference. First operand 6256 states and 9181 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 05:04:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:47,244 INFO L93 Difference]: Finished difference Result 6776 states and 9775 transitions. [2024-11-09 05:04:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:04:47,245 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 05:04:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:47,278 INFO L225 Difference]: With dead ends: 6776 [2024-11-09 05:04:47,278 INFO L226 Difference]: Without dead ends: 6227 [2024-11-09 05:04:47,283 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 05:04:47,283 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 47 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:47,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1093 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:04:47,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6227 states. [2024-11-09 05:04:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6227 to 6167. [2024-11-09 05:04:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6167 states, 5146 states have (on average 1.4387874076952973) internal successors, (7404), 5174 states have internal predecessors, (7404), 696 states have call successors, (696), 325 states have call predecessors, (696), 323 states have return successors, (981), 669 states have call predecessors, (981), 693 states have call successors, (981) [2024-11-09 05:04:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6167 states to 6167 states and 9081 transitions. [2024-11-09 05:04:47,941 INFO L78 Accepts]: Start accepts. Automaton has 6167 states and 9081 transitions. Word has length 112 [2024-11-09 05:04:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:47,942 INFO L471 AbstractCegarLoop]: Abstraction has 6167 states and 9081 transitions. [2024-11-09 05:04:47,942 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 05:04:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6167 states and 9081 transitions. [2024-11-09 05:04:47,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 05:04:47,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:47,951 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 05:04:47,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:04:48,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:04:48,152 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:48,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:48,152 INFO L85 PathProgramCache]: Analyzing trace with hash 667479376, now seen corresponding path program 1 times [2024-11-09 05:04:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:48,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923128178] [2024-11-09 05:04:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:48,297 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 05:04:48,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:48,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923128178] [2024-11-09 05:04:48,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923128178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:04:48,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:04:48,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:04:48,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820237835] [2024-11-09 05:04:48,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:04:48,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:04:48,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:04:48,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:04:48,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:04:48,300 INFO L87 Difference]: Start difference. First operand 6167 states and 9081 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 05:04:49,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:04:49,067 INFO L93 Difference]: Finished difference Result 6916 states and 9926 transitions. [2024-11-09 05:04:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:04:49,068 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 05:04:49,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:04:49,104 INFO L225 Difference]: With dead ends: 6916 [2024-11-09 05:04:49,104 INFO L226 Difference]: Without dead ends: 6459 [2024-11-09 05:04:49,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:04:49,108 INFO L432 NwaCegarLoop]: 282 mSDtfsCounter, 264 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:04:49,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1188 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:04:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6459 states. [2024-11-09 05:04:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6459 to 6425. [2024-11-09 05:04:49,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 5308 states have (on average 1.4287867370007536) internal successors, (7584), 5342 states have internal predecessors, (7584), 744 states have call successors, (744), 367 states have call predecessors, (744), 371 states have return successors, (1041), 717 states have call predecessors, (1041), 741 states have call successors, (1041) [2024-11-09 05:04:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 9369 transitions. [2024-11-09 05:04:49,825 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 9369 transitions. Word has length 113 [2024-11-09 05:04:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:04:49,825 INFO L471 AbstractCegarLoop]: Abstraction has 6425 states and 9369 transitions. [2024-11-09 05:04:49,825 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 05:04:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 9369 transitions. [2024-11-09 05:04:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 05:04:49,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:04:49,835 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 05:04:49,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 05:04:49,836 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:04:49,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:04:49,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1630405735, now seen corresponding path program 1 times [2024-11-09 05:04:49,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:04:49,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947382961] [2024-11-09 05:04:49,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:49,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:04:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:50,753 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-09 05:04:50,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:04:50,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947382961] [2024-11-09 05:04:50,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947382961] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:04:50,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966338711] [2024-11-09 05:04:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:04:50,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:04:50,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:04:50,755 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:04:50,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:04:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:04:50,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:04:50,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:04:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 51 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 05:04:51,775 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:04:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-09 05:04:53,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966338711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:04:53,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920236329] [2024-11-09 05:04:53,566 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 05:04:53,566 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:04:53,567 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:04:53,567 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:04:53,567 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:05:23,467 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 210 for LOIs [2024-11-09 05:05:23,646 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 05:05:23,648 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 05:05:23,651 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 174 for LOIs [2024-11-09 05:05:24,652 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2024-11-09 05:05:25,520 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 05:05:25,547 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 168 for LOIs [2024-11-09 05:05:25,695 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 179 for LOIs [2024-11-09 05:05:25,863 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:05:41,621 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124957#(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 05:05:41,621 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:05:41,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:05:41,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 50 [2024-11-09 05:05:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808847928] [2024-11-09 05:05:41,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:05:41,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 05:05:41,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 05:05:41,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=8884, Unknown=0, NotChecked=0, Total=9702 [2024-11-09 05:05:41,627 INFO L87 Difference]: Start difference. First operand 6425 states and 9369 transitions. Second operand has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-09 05:05:53,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:53,756 INFO L93 Difference]: Finished difference Result 8548 states and 11941 transitions. [2024-11-09 05:05:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-09 05:05:53,757 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) Word has length 114 [2024-11-09 05:05:53,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:53,794 INFO L225 Difference]: With dead ends: 8548 [2024-11-09 05:05:53,795 INFO L226 Difference]: Without dead ends: 7833 [2024-11-09 05:05:53,812 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 12 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18450 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=5867, Invalid=43195, Unknown=0, NotChecked=0, Total=49062 [2024-11-09 05:05:53,813 INFO L432 NwaCegarLoop]: 246 mSDtfsCounter, 3862 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 4671 mSolverCounterSat, 1855 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3862 SdHoareTripleChecker+Valid, 3420 SdHoareTripleChecker+Invalid, 6526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1855 IncrementalHoareTripleChecker+Valid, 4671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:53,813 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3862 Valid, 3420 Invalid, 6526 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1855 Valid, 4671 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2024-11-09 05:05:53,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7833 states. [2024-11-09 05:05:54,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7833 to 6425. [2024-11-09 05:05:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6425 states, 5308 states have (on average 1.428033157498116) internal successors, (7580), 5342 states have internal predecessors, (7580), 744 states have call successors, (744), 367 states have call predecessors, (744), 371 states have return successors, (1041), 717 states have call predecessors, (1041), 741 states have call successors, (1041) [2024-11-09 05:05:54,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6425 states to 6425 states and 9365 transitions. [2024-11-09 05:05:54,872 INFO L78 Accepts]: Start accepts. Automaton has 6425 states and 9365 transitions. Word has length 114 [2024-11-09 05:05:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:54,872 INFO L471 AbstractCegarLoop]: Abstraction has 6425 states and 9365 transitions. [2024-11-09 05:05:54,873 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 31 states have (on average 5.419354838709677) internal successors, (168), 38 states have internal predecessors, (168), 20 states have call successors, (41), 15 states have call predecessors, (41), 23 states have return successors, (43), 18 states have call predecessors, (43), 20 states have call successors, (43) [2024-11-09 05:05:54,873 INFO L276 IsEmpty]: Start isEmpty. Operand 6425 states and 9365 transitions. [2024-11-09 05:05:54,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 05:05:54,885 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:54,885 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 05:05:54,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 05:05:55,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:55,090 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:05:55,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -717592303, now seen corresponding path program 1 times [2024-11-09 05:05:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:55,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992314754] [2024-11-09 05:05:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:55,535 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 05:05:55,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:05:55,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992314754] [2024-11-09 05:05:55,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992314754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:55,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656102202] [2024-11-09 05:05:55,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:55,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:55,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:05:55,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:05:55,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:05:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:05:55,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:05:55,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:05:55,793 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 05:05:55,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:05:56,023 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 05:05:56,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656102202] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:05:56,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:05:56,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 05:05:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306772218] [2024-11-09 05:05:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:05:56,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:05:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:05:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:05:56,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:05:56,026 INFO L87 Difference]: Start difference. First operand 6425 states and 9365 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 05:05:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:05:57,873 INFO L93 Difference]: Finished difference Result 7297 states and 10374 transitions. [2024-11-09 05:05:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:05:57,874 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 05:05:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:05:57,906 INFO L225 Difference]: With dead ends: 7297 [2024-11-09 05:05:57,906 INFO L226 Difference]: Without dead ends: 6582 [2024-11-09 05:05:57,911 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 05:05:57,912 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 420 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:05:57,912 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 522 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:05:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6582 states. [2024-11-09 05:05:58,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6582 to 6404. [2024-11-09 05:05:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6404 states, 5280 states have (on average 1.4289772727272727) internal successors, (7545), 5317 states have internal predecessors, (7545), 747 states have call successors, (747), 364 states have call predecessors, (747), 375 states have return successors, (1060), 724 states have call predecessors, (1060), 744 states have call successors, (1060) [2024-11-09 05:05:59,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6404 states to 6404 states and 9352 transitions. [2024-11-09 05:05:59,008 INFO L78 Accepts]: Start accepts. Automaton has 6404 states and 9352 transitions. Word has length 115 [2024-11-09 05:05:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:05:59,009 INFO L471 AbstractCegarLoop]: Abstraction has 6404 states and 9352 transitions. [2024-11-09 05:05:59,010 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 05:05:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 6404 states and 9352 transitions. [2024-11-09 05:05:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 05:05:59,026 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:05:59,026 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 05:05:59,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:05:59,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:05:59,227 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:05:59,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:05:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 903028553, now seen corresponding path program 1 times [2024-11-09 05:05:59,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:05:59,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349254603] [2024-11-09 05:05:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:05:59,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:05:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:06:00,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:06:00,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349254603] [2024-11-09 05:06:00,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349254603] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:06:00,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695667836] [2024-11-09 05:06:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:06:00,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:06:00,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:06:00,510 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:06:00,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:06:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:06:00,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:06:00,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:06:01,991 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 05:06:01,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:06:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-09 05:06:04,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695667836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:06:04,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498228697] [2024-11-09 05:06:04,816 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 05:06:04,816 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:06:04,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:06:04,817 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:06:04,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:06:20,567 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 211 for LOIs [2024-11-09 05:06:20,763 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 05:06:20,794 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 05:06:20,798 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 175 for LOIs [2024-11-09 05:06:21,749 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 176 for LOIs [2024-11-09 05:06:22,760 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 05:06:22,810 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 169 for LOIs [2024-11-09 05:06:23,039 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 180 for LOIs [2024-11-09 05:06:23,206 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:06:39,543 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164539#(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)))) (= ~c_dr_st~0 1) (exists ((v_~q_free~0_107 Int) (v_~q_req_up~0_113 Int)) (and (or (and (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_107 0)) (and (<= 0 ~p_dw_pc~0) (<= v_~q_free~0_107 1) (= ~p_dw_st~0 0))) (or (exists ((v_~p_dw_pc~0_50 Int) (v_~p_dw_st~0_140 Int)) (and (or (and (= v_~p_dw_st~0_140 1) (= v_~p_dw_pc~0_50 0)) (and (= v_~p_dw_st~0_140 1) (= v_~q_req_up~0_113 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (<= ~p_last_write~0 2147483647))) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 1)) (and (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_70| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 0)) (<= |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_70| 2147483648)))) (= v_~p_dw_pc~0_50 0))))) (= ~p_dw_st~0 0)))))' at error location [2024-11-09 05:06:39,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:06:39,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:06:39,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 59 [2024-11-09 05:06:39,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774304678] [2024-11-09 05:06:39,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:06:39,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 05:06:39,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:06:39,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 05:06:39,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=11376, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 05:06:39,548 INFO L87 Difference]: Start difference. First operand 6404 states and 9352 transitions. Second operand has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-09 05:07:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:11,184 INFO L93 Difference]: Finished difference Result 10439 states and 14090 transitions. [2024-11-09 05:07:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2024-11-09 05:07:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-09 05:07:11,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:11,219 INFO L225 Difference]: With dead ends: 10439 [2024-11-09 05:07:11,219 INFO L226 Difference]: Without dead ends: 9748 [2024-11-09 05:07:11,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 96072 ImplicationChecksByTransitivity, 39.2s TimeCoverageRelationStatistics Valid=22485, Invalid=197007, Unknown=0, NotChecked=0, Total=219492 [2024-11-09 05:07:11,251 INFO L432 NwaCegarLoop]: 227 mSDtfsCounter, 8279 mSDsluCounter, 3583 mSDsCounter, 0 mSdLazyCounter, 8400 mSolverCounterSat, 4141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8282 SdHoareTripleChecker+Valid, 3810 SdHoareTripleChecker+Invalid, 12541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4141 IncrementalHoareTripleChecker+Valid, 8400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:11,251 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8282 Valid, 3810 Invalid, 12541 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4141 Valid, 8400 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-09 05:07:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9748 states. [2024-11-09 05:07:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9748 to 7914. [2024-11-09 05:07:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7914 states, 6339 states have (on average 1.3812904243571542) internal successors, (8756), 6388 states have internal predecessors, (8756), 974 states have call successors, (974), 552 states have call predecessors, (974), 599 states have return successors, (1343), 975 states have call predecessors, (1343), 971 states have call successors, (1343) [2024-11-09 05:07:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7914 states to 7914 states and 11073 transitions. [2024-11-09 05:07:12,648 INFO L78 Accepts]: Start accepts. Automaton has 7914 states and 11073 transitions. Word has length 124 [2024-11-09 05:07:12,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:12,651 INFO L471 AbstractCegarLoop]: Abstraction has 7914 states and 11073 transitions. [2024-11-09 05:07:12,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 39 states have (on average 5.512820512820513) internal successors, (215), 43 states have internal predecessors, (215), 26 states have call successors, (49), 18 states have call predecessors, (49), 23 states have return successors, (51), 25 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-09 05:07:12,651 INFO L276 IsEmpty]: Start isEmpty. Operand 7914 states and 11073 transitions. [2024-11-09 05:07:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 05:07:12,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:12,663 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 05:07:12,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-09 05:07:12,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 05:07:12,864 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:12,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:12,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1276764283, now seen corresponding path program 1 times [2024-11-09 05:07:12,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:12,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232732518] [2024-11-09 05:07:12,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:12,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:13,110 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 05:07:13,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232732518] [2024-11-09 05:07:13,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232732518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:13,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895843106] [2024-11-09 05:07:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:13,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:13,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:07:13,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:07:13,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:07:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:13,258 INFO L255 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:07:13,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:07:13,386 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 05:07:13,386 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:07:13,569 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 05:07:13,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895843106] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:13,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:07:13,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 05:07:13,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375017396] [2024-11-09 05:07:13,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:13,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:07:13,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:13,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:07:13,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:07:13,571 INFO L87 Difference]: Start difference. First operand 7914 states and 11073 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 05:07:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:15,334 INFO L93 Difference]: Finished difference Result 8356 states and 11565 transitions. [2024-11-09 05:07:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:07:15,335 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 05:07:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:15,357 INFO L225 Difference]: With dead ends: 8356 [2024-11-09 05:07:15,357 INFO L226 Difference]: Without dead ends: 5619 [2024-11-09 05:07:15,365 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-09 05:07:15,366 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 604 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:15,366 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 477 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:07:15,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2024-11-09 05:07:16,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 5619. [2024-11-09 05:07:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5619 states, 4744 states have (on average 1.4629005059021922) internal successors, (6940), 4770 states have internal predecessors, (6940), 618 states have call successors, (618), 257 states have call predecessors, (618), 256 states have return successors, (904), 592 states have call predecessors, (904), 616 states have call successors, (904) [2024-11-09 05:07:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5619 states to 5619 states and 8462 transitions. [2024-11-09 05:07:16,107 INFO L78 Accepts]: Start accepts. Automaton has 5619 states and 8462 transitions. Word has length 125 [2024-11-09 05:07:16,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:16,108 INFO L471 AbstractCegarLoop]: Abstraction has 5619 states and 8462 transitions. [2024-11-09 05:07:16,108 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 05:07:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5619 states and 8462 transitions. [2024-11-09 05:07:16,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 05:07:16,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:16,122 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:07:16,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 05:07:16,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 05:07:16,323 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:16,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:16,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1872876155, now seen corresponding path program 1 times [2024-11-09 05:07:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632076893] [2024-11-09 05:07:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:07:16,394 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:16,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632076893] [2024-11-09 05:07:16,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632076893] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:07:16,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:07:16,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:07:16,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871095222] [2024-11-09 05:07:16,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:16,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:07:16,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:16,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:07:16,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:07:16,398 INFO L87 Difference]: Start difference. First operand 5619 states and 8462 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:17,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:17,832 INFO L93 Difference]: Finished difference Result 16668 states and 25595 transitions. [2024-11-09 05:07:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:07:17,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2024-11-09 05:07:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:17,869 INFO L225 Difference]: With dead ends: 16668 [2024-11-09 05:07:17,870 INFO L226 Difference]: Without dead ends: 11055 [2024-11-09 05:07:17,886 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 05:07:17,887 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 175 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:17,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:07:17,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11055 states. [2024-11-09 05:07:18,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11055 to 10995. [2024-11-09 05:07:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10995 states, 9292 states have (on average 1.4520017219113215) internal successors, (13492), 9342 states have internal predecessors, (13492), 1190 states have call successors, (1190), 513 states have call predecessors, (1190), 512 states have return successors, (1732), 1140 states have call predecessors, (1732), 1188 states have call successors, (1732) [2024-11-09 05:07:19,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10995 states to 10995 states and 16414 transitions. [2024-11-09 05:07:19,041 INFO L78 Accepts]: Start accepts. Automaton has 10995 states and 16414 transitions. Word has length 139 [2024-11-09 05:07:19,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:19,042 INFO L471 AbstractCegarLoop]: Abstraction has 10995 states and 16414 transitions. [2024-11-09 05:07:19,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:19,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10995 states and 16414 transitions. [2024-11-09 05:07:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 05:07:19,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:19,065 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:07:19,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 05:07:19,065 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:19,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1481737926, now seen corresponding path program 1 times [2024-11-09 05:07:19,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:19,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241098878] [2024-11-09 05:07:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:19,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:07:19,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241098878] [2024-11-09 05:07:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241098878] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:07:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:07:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:07:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176321083] [2024-11-09 05:07:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:19,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:07:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:07:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:07:19,135 INFO L87 Difference]: Start difference. First operand 10995 states and 16414 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:21,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:21,215 INFO L93 Difference]: Finished difference Result 32620 states and 49607 transitions. [2024-11-09 05:07:21,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:07:21,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2024-11-09 05:07:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:21,295 INFO L225 Difference]: With dead ends: 32620 [2024-11-09 05:07:21,296 INFO L226 Difference]: Without dead ends: 21631 [2024-11-09 05:07:21,345 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 05:07:21,346 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 177 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:21,346 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 343 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:07:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21631 states. [2024-11-09 05:07:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21631 to 21515. [2024-11-09 05:07:23,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21515 states, 18196 states have (on average 1.4405363816223347) internal successors, (26212), 18294 states have internal predecessors, (26212), 2294 states have call successors, (2294), 1025 states have call predecessors, (2294), 1024 states have return successors, (3316), 2196 states have call predecessors, (3316), 2292 states have call successors, (3316) [2024-11-09 05:07:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21515 states to 21515 states and 31822 transitions. [2024-11-09 05:07:23,451 INFO L78 Accepts]: Start accepts. Automaton has 21515 states and 31822 transitions. Word has length 139 [2024-11-09 05:07:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:23,452 INFO L471 AbstractCegarLoop]: Abstraction has 21515 states and 31822 transitions. [2024-11-09 05:07:23,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 21515 states and 31822 transitions. [2024-11-09 05:07:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-09 05:07:23,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:23,486 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:07:23,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 05:07:23,486 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:23,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash -48780752, now seen corresponding path program 1 times [2024-11-09 05:07:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112441449] [2024-11-09 05:07:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:23,565 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-09 05:07:23,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:23,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112441449] [2024-11-09 05:07:23,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112441449] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:07:23,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:07:23,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:07:23,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041147259] [2024-11-09 05:07:23,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:23,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:07:23,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:23,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:07:23,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:07:23,568 INFO L87 Difference]: Start difference. First operand 21515 states and 31822 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:27,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:27,442 INFO L93 Difference]: Finished difference Result 63828 states and 96071 transitions. [2024-11-09 05:07:27,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:07:27,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 139 [2024-11-09 05:07:27,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:27,594 INFO L225 Difference]: With dead ends: 63828 [2024-11-09 05:07:27,594 INFO L226 Difference]: Without dead ends: 42319 [2024-11-09 05:07:27,656 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 05:07:27,657 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 180 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:27,657 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 347 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:07:27,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42319 states. [2024-11-09 05:07:31,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42319 to 42091. [2024-11-09 05:07:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42091 states, 35620 states have (on average 1.4285233015160022) internal successors, (50884), 35814 states have internal predecessors, (50884), 4422 states have call successors, (4422), 2049 states have call predecessors, (4422), 2048 states have return successors, (6340), 4228 states have call predecessors, (6340), 4420 states have call successors, (6340) [2024-11-09 05:07:31,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42091 states to 42091 states and 61646 transitions. [2024-11-09 05:07:31,895 INFO L78 Accepts]: Start accepts. Automaton has 42091 states and 61646 transitions. Word has length 139 [2024-11-09 05:07:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:31,895 INFO L471 AbstractCegarLoop]: Abstraction has 42091 states and 61646 transitions. [2024-11-09 05:07:31,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-11-09 05:07:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 42091 states and 61646 transitions. [2024-11-09 05:07:31,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 05:07:31,987 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:31,987 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:07:31,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-09 05:07:31,988 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:31,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash -469134212, now seen corresponding path program 1 times [2024-11-09 05:07:31,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:31,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680733842] [2024-11-09 05:07:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:31,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-09 05:07:32,221 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680733842] [2024-11-09 05:07:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680733842] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301346824] [2024-11-09 05:07:32,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:07:32,225 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:07:32,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:07:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:32,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 804 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:07:32,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:07:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-09 05:07:32,468 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:07:32,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301346824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:07:32,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:07:32,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-09 05:07:32,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160642125] [2024-11-09 05:07:32,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:32,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:07:32,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:07:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:07:32,471 INFO L87 Difference]: Start difference. First operand 42091 states and 61646 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:07:37,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:07:37,779 INFO L93 Difference]: Finished difference Result 77352 states and 113285 transitions. [2024-11-09 05:07:37,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:07:37,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2024-11-09 05:07:37,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:07:37,921 INFO L225 Difference]: With dead ends: 77352 [2024-11-09 05:07:37,921 INFO L226 Difference]: Without dead ends: 52580 [2024-11-09 05:07:37,996 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-09 05:07:37,996 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 185 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:07:37,997 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 245 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:07:38,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52580 states. [2024-11-09 05:07:43,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52580 to 52580. [2024-11-09 05:07:43,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52580 states, 45154 states have (on average 1.3919032643841078) internal successors, (62850), 45348 states have internal predecessors, (62850), 4739 states have call successors, (4739), 2686 states have call predecessors, (4739), 2686 states have return successors, (6911), 4546 states have call predecessors, (6911), 4737 states have call successors, (6911) [2024-11-09 05:07:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52580 states to 52580 states and 74500 transitions. [2024-11-09 05:07:43,693 INFO L78 Accepts]: Start accepts. Automaton has 52580 states and 74500 transitions. Word has length 161 [2024-11-09 05:07:43,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:07:43,693 INFO L471 AbstractCegarLoop]: Abstraction has 52580 states and 74500 transitions. [2024-11-09 05:07:43,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-09 05:07:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 52580 states and 74500 transitions. [2024-11-09 05:07:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2024-11-09 05:07:43,767 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:07:43,767 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-11-09 05:07:43,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 05:07:43,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:43,968 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:07:43,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:07:43,969 INFO L85 PathProgramCache]: Analyzing trace with hash -69143013, now seen corresponding path program 2 times [2024-11-09 05:07:43,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:07:43,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538761000] [2024-11-09 05:07:43,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:07:43,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:07:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:07:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-09 05:07:44,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:07:44,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538761000] [2024-11-09 05:07:44,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538761000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:07:44,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846335384] [2024-11-09 05:07:44,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 05:07:44,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:07:44,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:07:44,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:07:44,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_84cfeb0d-4ced-418f-b5c5-1b516ae1ea72/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:07:44,366 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 05:07:44,366 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 05:07:44,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-09 05:07:44,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:07:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:07:44,420 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:07:44,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846335384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:07:44,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:07:44,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-09 05:07:44,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797739211] [2024-11-09 05:07:44,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:07:44,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:07:44,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:07:44,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:07:44,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:07:44,421 INFO L87 Difference]: Start difference. First operand 52580 states and 74500 transitions. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10)