./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 11:25:27,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 11:25:28,022 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 11:25:28,027 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 11:25:28,030 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 11:25:28,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 11:25:28,068 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 11:25:28,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 11:25:28,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 11:25:28,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 11:25:28,072 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 11:25:28,072 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 11:25:28,072 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 11:25:28,073 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 11:25:28,073 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 11:25:28,075 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 11:25:28,076 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 11:25:28,076 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 11:25:28,076 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 11:25:28,077 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 11:25:28,077 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 11:25:28,081 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 11:25:28,082 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 11:25:28,082 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 11:25:28,082 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 11:25:28,082 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 11:25:28,083 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 11:25:28,083 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 11:25:28,083 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 11:25:28,083 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 11:25:28,084 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 11:25:28,084 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 11:25:28,084 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 11:25:28,084 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 11:25:28,085 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 11:25:28,087 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 11:25:28,087 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 11:25:28,087 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 11:25:28,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:28,088 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 11:25:28,088 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 11:25:28,089 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 11:25:28,089 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 11:25:28,089 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 11:25:28,090 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 11:25:28,090 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 11:25:28,090 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 11:25:28,091 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_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c775d42bfad3c45ab40b07224c097c48233d7fc79c2c6639ab29adb0162bc4be [2024-11-02 11:25:28,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 11:25:28,482 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 11:25:28,485 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 11:25:28,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 11:25:28,488 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 11:25:28,489 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c Unable to find full path for "g++" [2024-11-02 11:25:30,746 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 11:25:31,024 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 11:25:31,025 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2024-11-02 11:25:31,053 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/data/3b5b8ba30/3de344dd36b94f8cb9c45dc0aa956f07/FLAG6dd9896c4 [2024-11-02 11:25:31,092 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/data/3b5b8ba30/3de344dd36b94f8cb9c45dc0aa956f07 [2024-11-02 11:25:31,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 11:25:31,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 11:25:31,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:31,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 11:25:31,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 11:25:31,114 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,120 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e76f960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31, skipping insertion in model container [2024-11-02 11:25:31,120 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,222 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 11:25:31,425 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2024-11-02 11:25:31,518 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2024-11-02 11:25:31,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:31,643 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 11:25:31,657 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[913,926] [2024-11-02 11:25:31,700 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.04.cil-2.c[5977,5990] [2024-11-02 11:25:31,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 11:25:31,826 INFO L204 MainTranslator]: Completed translation [2024-11-02 11:25:31,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31 WrapperNode [2024-11-02 11:25:31,827 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 11:25:31,828 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:31,828 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 11:25:31,829 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 11:25:31,838 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,896 INFO L138 Inliner]: procedures = 56, calls = 61, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 609 [2024-11-02 11:25:31,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 11:25:31,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 11:25:31,898 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 11:25:31,898 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 11:25:31,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,924 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,924 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,963 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,971 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:31,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 11:25:31,988 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 11:25:31,988 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 11:25:31,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 11:25:31,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (1/1) ... [2024-11-02 11:25:32,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 11:25:32,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:32,041 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 11:25:32,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 11:25:32,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 11:25:32,082 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-02 11:25:32,082 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-02 11:25:32,082 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2024-11-02 11:25:32,082 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2024-11-02 11:25:32,083 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-02 11:25:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-02 11:25:32,083 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-02 11:25:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-02 11:25:32,083 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-02 11:25:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-02 11:25:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-02 11:25:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-02 11:25:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-02 11:25:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-02 11:25:32,084 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 11:25:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-02 11:25:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-02 11:25:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 11:25:32,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 11:25:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-02 11:25:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-02 11:25:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-02 11:25:32,086 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-02 11:25:32,249 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 11:25:32,252 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 11:25:33,381 INFO L? ?]: Removed 83 outVars from TransFormulas that were not future-live. [2024-11-02 11:25:33,385 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 11:25:33,833 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 11:25:33,833 INFO L316 CfgBuilder]: Removed 11 assume(true) statements. [2024-11-02 11:25:33,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:33 BoogieIcfgContainer [2024-11-02 11:25:33,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 11:25:33,837 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 11:25:33,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 11:25:33,841 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 11:25:33,842 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:25:31" (1/3) ... [2024-11-02 11:25:33,843 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:33, skipping insertion in model container [2024-11-02 11:25:33,843 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:25:31" (2/3) ... [2024-11-02 11:25:33,844 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2659d953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:25:33, skipping insertion in model container [2024-11-02 11:25:33,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:25:33" (3/3) ... [2024-11-02 11:25:33,848 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.04.cil-2.c [2024-11-02 11:25:33,875 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 11:25:33,875 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-02 11:25:33,972 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 11:25:33,980 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;@58bb4585, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 11:25:33,981 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-02 11:25:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand has 162 states, 123 states have (on average 1.5284552845528456) internal successors, (188), 130 states have internal predecessors, (188), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-02 11:25:33,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-02 11:25:33,999 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:34,000 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] [2024-11-02 11:25:34,001 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:34,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:34,008 INFO L85 PathProgramCache]: Analyzing trace with hash -754631432, now seen corresponding path program 1 times [2024-11-02 11:25:34,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:34,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366781011] [2024-11-02 11:25:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:34,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:34,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:34,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:34,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:34,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366781011] [2024-11-02 11:25:34,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366781011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:34,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:34,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:34,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647158099] [2024-11-02 11:25:34,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:34,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:34,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:34,522 INFO L87 Difference]: Start difference. First operand has 162 states, 123 states have (on average 1.5284552845528456) internal successors, (188), 130 states have internal predecessors, (188), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:34,745 INFO L93 Difference]: Finished difference Result 356 states and 528 transitions. [2024-11-02 11:25:34,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:34,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-11-02 11:25:34,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:34,763 INFO L225 Difference]: With dead ends: 356 [2024-11-02 11:25:34,763 INFO L226 Difference]: Without dead ends: 194 [2024-11-02 11:25:34,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:34,773 INFO L432 NwaCegarLoop]: 202 mSDtfsCounter, 205 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:34,775 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 257 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:34,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-11-02 11:25:34,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 190. [2024-11-02 11:25:34,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 149 states have (on average 1.4429530201342282) internal successors, (215), 153 states have internal predecessors, (215), 29 states have call successors, (29), 12 states have call predecessors, (29), 10 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-11-02 11:25:34,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 269 transitions. [2024-11-02 11:25:34,881 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 269 transitions. Word has length 28 [2024-11-02 11:25:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:34,886 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 269 transitions. [2024-11-02 11:25:34,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 269 transitions. [2024-11-02 11:25:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-02 11:25:34,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:34,890 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] [2024-11-02 11:25:34,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 11:25:34,891 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:34,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -820063417, now seen corresponding path program 1 times [2024-11-02 11:25:34,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:34,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772979650] [2024-11-02 11:25:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:35,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:35,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772979650] [2024-11-02 11:25:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772979650] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:35,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:35,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991545341] [2024-11-02 11:25:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:35,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:35,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:35,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:35,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:35,017 INFO L87 Difference]: Start difference. First operand 190 states and 269 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:35,150 INFO L93 Difference]: Finished difference Result 346 states and 486 transitions. [2024-11-02 11:25:35,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:35,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2024-11-02 11:25:35,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:35,154 INFO L225 Difference]: With dead ends: 346 [2024-11-02 11:25:35,154 INFO L226 Difference]: Without dead ends: 265 [2024-11-02 11:25:35,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:35,157 INFO L432 NwaCegarLoop]: 188 mSDtfsCounter, 203 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:35,158 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 241 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-11-02 11:25:35,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 261. [2024-11-02 11:25:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 209 states have (on average 1.4162679425837321) internal successors, (296), 213 states have internal predecessors, (296), 36 states have call successors, (36), 16 states have call predecessors, (36), 14 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-02 11:25:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 364 transitions. [2024-11-02 11:25:35,186 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 364 transitions. Word has length 29 [2024-11-02 11:25:35,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:35,186 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 364 transitions. [2024-11-02 11:25:35,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:35,187 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 364 transitions. [2024-11-02 11:25:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 11:25:35,189 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:35,189 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] [2024-11-02 11:25:35,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 11:25:35,190 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:35,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:35,191 INFO L85 PathProgramCache]: Analyzing trace with hash 719712559, now seen corresponding path program 1 times [2024-11-02 11:25:35,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:35,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814904467] [2024-11-02 11:25:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:35,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:35,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814904467] [2024-11-02 11:25:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814904467] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:35,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:35,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:35,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411543707] [2024-11-02 11:25:35,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:35,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:35,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:35,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:35,304 INFO L87 Difference]: Start difference. First operand 261 states and 364 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:35,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:35,461 INFO L93 Difference]: Finished difference Result 501 states and 692 transitions. [2024-11-02 11:25:35,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:35,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2024-11-02 11:25:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:35,465 INFO L225 Difference]: With dead ends: 501 [2024-11-02 11:25:35,468 INFO L226 Difference]: Without dead ends: 349 [2024-11-02 11:25:35,469 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:35,471 INFO L432 NwaCegarLoop]: 200 mSDtfsCounter, 46 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:35,471 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 373 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-02 11:25:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 335. [2024-11-02 11:25:35,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 272 states have (on average 1.400735294117647) internal successors, (381), 278 states have internal predecessors, (381), 42 states have call successors, (42), 21 states have call predecessors, (42), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2024-11-02 11:25:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 461 transitions. [2024-11-02 11:25:35,522 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 461 transitions. Word has length 30 [2024-11-02 11:25:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:35,522 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 461 transitions. [2024-11-02 11:25:35,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-02 11:25:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 461 transitions. [2024-11-02 11:25:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-02 11:25:35,525 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:35,526 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] [2024-11-02 11:25:35,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 11:25:35,526 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:35,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:35,527 INFO L85 PathProgramCache]: Analyzing trace with hash 17921240, now seen corresponding path program 1 times [2024-11-02 11:25:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:35,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314839398] [2024-11-02 11:25:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:35,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314839398] [2024-11-02 11:25:35,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314839398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:35,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:35,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:35,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856563351] [2024-11-02 11:25:35,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:35,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:35,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:35,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:35,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:35,690 INFO L87 Difference]: Start difference. First operand 335 states and 461 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-02 11:25:36,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:36,055 INFO L93 Difference]: Finished difference Result 529 states and 754 transitions. [2024-11-02 11:25:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 44 [2024-11-02 11:25:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:36,061 INFO L225 Difference]: With dead ends: 529 [2024-11-02 11:25:36,061 INFO L226 Difference]: Without dead ends: 426 [2024-11-02 11:25:36,063 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:36,066 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 324 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:36,068 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 498 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:25:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2024-11-02 11:25:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 425. [2024-11-02 11:25:36,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 342 states have (on average 1.391812865497076) internal successors, (476), 349 states have internal predecessors, (476), 56 states have call successors, (56), 27 states have call predecessors, (56), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-02 11:25:36,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 584 transitions. [2024-11-02 11:25:36,117 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 584 transitions. Word has length 44 [2024-11-02 11:25:36,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:36,118 INFO L471 AbstractCegarLoop]: Abstraction has 425 states and 584 transitions. [2024-11-02 11:25:36,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2024-11-02 11:25:36,118 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 584 transitions. [2024-11-02 11:25:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-02 11:25:36,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:36,121 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] [2024-11-02 11:25:36,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 11:25:36,122 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:36,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:36,123 INFO L85 PathProgramCache]: Analyzing trace with hash 441209541, now seen corresponding path program 1 times [2024-11-02 11:25:36,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:36,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670034695] [2024-11-02 11:25:36,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:36,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 11:25:36,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:36,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670034695] [2024-11-02 11:25:36,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670034695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:36,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:36,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:36,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853366760] [2024-11-02 11:25:36,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:36,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:36,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:36,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:36,221 INFO L87 Difference]: Start difference. First operand 425 states and 584 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:36,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:36,356 INFO L93 Difference]: Finished difference Result 588 states and 802 transitions. [2024-11-02 11:25:36,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:36,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-11-02 11:25:36,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:36,359 INFO L225 Difference]: With dead ends: 588 [2024-11-02 11:25:36,360 INFO L226 Difference]: Without dead ends: 430 [2024-11-02 11:25:36,361 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:36,362 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 32 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:36,363 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 405 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2024-11-02 11:25:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 419. [2024-11-02 11:25:36,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 336 states have (on average 1.375) internal successors, (462), 343 states have internal predecessors, (462), 56 states have call successors, (56), 27 states have call predecessors, (56), 25 states have return successors, (52), 49 states have call predecessors, (52), 52 states have call successors, (52) [2024-11-02 11:25:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 570 transitions. [2024-11-02 11:25:36,400 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 570 transitions. Word has length 43 [2024-11-02 11:25:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:36,401 INFO L471 AbstractCegarLoop]: Abstraction has 419 states and 570 transitions. [2024-11-02 11:25:36,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:36,402 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 570 transitions. [2024-11-02 11:25:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-02 11:25:36,404 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:36,404 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:25:36,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 11:25:36,405 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:36,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:36,406 INFO L85 PathProgramCache]: Analyzing trace with hash 172794428, now seen corresponding path program 1 times [2024-11-02 11:25:36,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:36,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859471543] [2024-11-02 11:25:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-02 11:25:36,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859471543] [2024-11-02 11:25:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859471543] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:36,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:36,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-02 11:25:36,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143918855] [2024-11-02 11:25:36,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:36,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 11:25:36,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 11:25:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:36,474 INFO L87 Difference]: Start difference. First operand 419 states and 570 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:25:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:36,619 INFO L93 Difference]: Finished difference Result 668 states and 894 transitions. [2024-11-02 11:25:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 11:25:36,620 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2024-11-02 11:25:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:36,623 INFO L225 Difference]: With dead ends: 668 [2024-11-02 11:25:36,624 INFO L226 Difference]: Without dead ends: 465 [2024-11-02 11:25:36,625 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 11:25:36,626 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 188 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:36,626 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 239 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 11:25:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2024-11-02 11:25:36,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 465. [2024-11-02 11:25:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 375 states have (on average 1.3466666666666667) internal successors, (505), 382 states have internal predecessors, (505), 60 states have call successors, (60), 30 states have call predecessors, (60), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-02 11:25:36,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 621 transitions. [2024-11-02 11:25:36,667 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 621 transitions. Word has length 46 [2024-11-02 11:25:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:36,668 INFO L471 AbstractCegarLoop]: Abstraction has 465 states and 621 transitions. [2024-11-02 11:25:36,668 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), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:25:36,668 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 621 transitions. [2024-11-02 11:25:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:25:36,670 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:36,670 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:25:36,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 11:25:36,671 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:36,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:36,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1648113750, now seen corresponding path program 1 times [2024-11-02 11:25:36,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:36,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500181755] [2024-11-02 11:25:36,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:36,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-02 11:25:36,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:36,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500181755] [2024-11-02 11:25:36,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500181755] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:36,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:36,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853548807] [2024-11-02 11:25:36,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:36,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:36,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:36,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:36,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:36,750 INFO L87 Difference]: Start difference. First operand 465 states and 621 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:25:37,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:37,092 INFO L93 Difference]: Finished difference Result 692 states and 921 transitions. [2024-11-02 11:25:37,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:37,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-11-02 11:25:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:37,100 INFO L225 Difference]: With dead ends: 692 [2024-11-02 11:25:37,100 INFO L226 Difference]: Without dead ends: 463 [2024-11-02 11:25:37,101 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:37,104 INFO L432 NwaCegarLoop]: 218 mSDtfsCounter, 243 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:37,105 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 380 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:25:37,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2024-11-02 11:25:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 461. [2024-11-02 11:25:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 371 states have (on average 1.3180592991913747) internal successors, (489), 378 states have internal predecessors, (489), 60 states have call successors, (60), 30 states have call predecessors, (60), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-02 11:25:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 605 transitions. [2024-11-02 11:25:37,181 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 605 transitions. Word has length 47 [2024-11-02 11:25:37,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:37,183 INFO L471 AbstractCegarLoop]: Abstraction has 461 states and 605 transitions. [2024-11-02 11:25:37,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-02 11:25:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 605 transitions. [2024-11-02 11:25:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-02 11:25:37,186 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:37,187 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:25:37,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 11:25:37,187 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:37,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash -775275095, now seen corresponding path program 1 times [2024-11-02 11:25:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:37,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745007443] [2024-11-02 11:25:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:37,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:25:37,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745007443] [2024-11-02 11:25:37,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745007443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 11:25:37,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 11:25:37,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 11:25:37,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614205331] [2024-11-02 11:25:37,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 11:25:37,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 11:25:37,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 11:25:37,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 11:25:37,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 11:25:37,328 INFO L87 Difference]: Start difference. First operand 461 states and 605 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:37,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 11:25:37,689 INFO L93 Difference]: Finished difference Result 497 states and 646 transitions. [2024-11-02 11:25:37,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 11:25:37,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2024-11-02 11:25:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 11:25:37,693 INFO L225 Difference]: With dead ends: 497 [2024-11-02 11:25:37,695 INFO L226 Difference]: Without dead ends: 494 [2024-11-02 11:25:37,696 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-02 11:25:37,700 INFO L432 NwaCegarLoop]: 194 mSDtfsCounter, 344 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 11:25:37,700 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 233 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 11:25:37,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2024-11-02 11:25:37,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 460. [2024-11-02 11:25:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 371 states have (on average 1.3126684636118597) internal successors, (487), 377 states have internal predecessors, (487), 59 states have call successors, (59), 30 states have call predecessors, (59), 28 states have return successors, (56), 53 states have call predecessors, (56), 56 states have call successors, (56) [2024-11-02 11:25:37,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 602 transitions. [2024-11-02 11:25:37,762 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 602 transitions. Word has length 47 [2024-11-02 11:25:37,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 11:25:37,763 INFO L471 AbstractCegarLoop]: Abstraction has 460 states and 602 transitions. [2024-11-02 11:25:37,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-02 11:25:37,763 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 602 transitions. [2024-11-02 11:25:37,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-02 11:25:37,764 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 11:25:37,765 INFO L215 NwaCegarLoop]: trace histogram [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] [2024-11-02 11:25:37,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 11:25:37,769 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 11:25:37,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 11:25:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1735437119, now seen corresponding path program 1 times [2024-11-02 11:25:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 11:25:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113303830] [2024-11-02 11:25:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 11:25:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:25:37,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 11:25:37,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113303830] [2024-11-02 11:25:37,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113303830] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 11:25:37,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011490347] [2024-11-02 11:25:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 11:25:37,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 11:25:37,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 11:25:37,967 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 11:25:37,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7a016cfc-4814-4169-a9b9-78a28dd9650e/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 11:25:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 11:25:38,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-02 11:25:38,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 11:25:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 11:25:38,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 11:25:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 11:25:38,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011490347] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 11:25:38,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230476944] [2024-11-02 11:25:38,607 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2024-11-02 11:25:38,607 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 11:25:38,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 11:25:38,617 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 11:25:38,618 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 11:25:43,398 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 101 for LOIs [2024-11-02 11:25:43,452 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 126 for LOIs [2024-11-02 11:25:43,543 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 112 for LOIs [2024-11-02 11:25:45,535 INFO L180 IcfgInterpreter]: Interpretation finished