./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/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 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 05:24:14,372 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 05:24:14,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-09 05:24:14,494 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 05:24:14,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 05:24:14,538 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 05:24:14,539 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 05:24:14,539 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 05:24:14,540 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 05:24:14,541 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 05:24:14,541 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 05:24:14,542 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 05:24:14,543 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 05:24:14,545 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 05:24:14,545 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 05:24:14,546 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 05:24:14,546 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 05:24:14,546 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 05:24:14,547 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 05:24:14,547 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 05:24:14,552 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 05:24:14,552 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 05:24:14,553 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 05:24:14,553 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 05:24:14,554 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 05:24:14,554 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 05:24:14,554 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 05:24:14,555 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 05:24:14,555 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 05:24:14,555 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 05:24:14,556 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 05:24:14,558 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 05:24:14,558 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 05:24:14,559 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 05:24:14,559 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 05:24:14,560 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 05:24:14,560 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 05:24:14,561 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 05:24:14,561 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:24:14,561 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 05:24:14,562 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 05:24:14,562 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 05:24:14,562 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 05:24:14,563 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 05:24:14,563 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 05:24:14,564 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 05:24:14,564 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 05:24:14,564 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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2299ca1c26d35c3e5f6d860495fd40e041317a8644bf02bee237b59c63427ec2 [2024-11-09 05:24:14,914 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 05:24:14,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 05:24:14,946 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 05:24:14,949 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 05:24:14,950 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 05:24:14,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c Unable to find full path for "g++" [2024-11-09 05:24:16,912 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 05:24:17,201 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 05:24:17,202 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-09 05:24:17,217 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/data/49620f0f1/f5634074c32747ef9617b7e1ebfed433/FLAG50e28fde2 [2024-11-09 05:24:17,242 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/data/49620f0f1/f5634074c32747ef9617b7e1ebfed433 [2024-11-09 05:24:17,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 05:24:17,250 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 05:24:17,251 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 05:24:17,252 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 05:24:17,259 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 05:24:17,260 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:17,261 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624cc918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17, skipping insertion in model container [2024-11-09 05:24:17,263 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:17,332 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 05:24:17,580 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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-09 05:24:17,654 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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-09 05:24:17,758 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:24:17,785 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 05:24:17,800 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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[914,927] [2024-11-09 05:24:17,840 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_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.06.cil-1.c[7115,7128] [2024-11-09 05:24:17,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 05:24:17,936 INFO L204 MainTranslator]: Completed translation [2024-11-09 05:24:17,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17 WrapperNode [2024-11-09 05:24:17,936 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 05:24:17,938 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 05:24:17,938 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 05:24:17,938 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 05:24:17,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:17,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,028 INFO L138 Inliner]: procedures = 65, calls = 76, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 701 [2024-11-09 05:24:18,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 05:24:18,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 05:24:18,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 05:24:18,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 05:24:18,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,102 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 05:24:18,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 05:24:18,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 05:24:18,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 05:24:18,120 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (1/1) ... [2024-11-09 05:24:18,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 05:24:18,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:24:18,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 05:24:18,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 05:24:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 05:24:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-09 05:24:18,235 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-09 05:24:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-09 05:24:18,235 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-09 05:24:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-09 05:24:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-09 05:24:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-09 05:24:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-09 05:24:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-09 05:24:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-09 05:24:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-09 05:24:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-09 05:24:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-09 05:24:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-09 05:24:18,237 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-09 05:24:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-09 05:24:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-09 05:24:18,238 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-09 05:24:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-09 05:24:18,238 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-09 05:24:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-09 05:24:18,238 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-09 05:24:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 05:24:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-09 05:24:18,239 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-09 05:24:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-09 05:24:18,239 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-09 05:24:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 05:24:18,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 05:24:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-09 05:24:18,240 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-09 05:24:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-09 05:24:18,240 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-09 05:24:18,484 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 05:24:18,487 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 05:24:19,490 INFO L? ?]: Removed 95 outVars from TransFormulas that were not future-live. [2024-11-09 05:24:19,490 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 05:24:19,962 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 05:24:19,963 INFO L316 CfgBuilder]: Removed 13 assume(true) statements. [2024-11-09 05:24:19,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:24:19 BoogieIcfgContainer [2024-11-09 05:24:19,963 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 05:24:19,966 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 05:24:19,966 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 05:24:19,969 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 05:24:19,970 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 05:24:17" (1/3) ... [2024-11-09 05:24:19,970 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15077cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:24:19, skipping insertion in model container [2024-11-09 05:24:19,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 05:24:17" (2/3) ... [2024-11-09 05:24:19,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15077cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 05:24:19, skipping insertion in model container [2024-11-09 05:24:19,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 05:24:19" (3/3) ... [2024-11-09 05:24:19,973 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.06.cil-1.c [2024-11-09 05:24:19,992 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 05:24:19,992 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-11-09 05:24:20,068 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 05:24:20,075 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;@42e2c814, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 05:24:20,075 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-09 05:24:20,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-09 05:24:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:24:20,090 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:20,091 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 05:24:20,092 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:20,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:20,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1727234301, now seen corresponding path program 1 times [2024-11-09 05:24:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:20,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101347398] [2024-11-09 05:24:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:20,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:20,587 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 05:24:20,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:20,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101347398] [2024-11-09 05:24:20,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101347398] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:20,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:20,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:24:20,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974487712] [2024-11-09 05:24:20,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:20,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:24:20,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:20,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:24:20,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:24:20,623 INFO L87 Difference]: Start difference. First operand has 207 states, 153 states have (on average 1.5032679738562091) internal successors, (230), 161 states have internal predecessors, (230), 36 states have call successors, (36), 15 states have call predecessors, (36), 15 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) Second operand has 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 05:24:21,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:21,115 INFO L93 Difference]: Finished difference Result 464 states and 675 transitions. [2024-11-09 05:24:21,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:24:21,118 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 05:24:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:21,133 INFO L225 Difference]: With dead ends: 464 [2024-11-09 05:24:21,134 INFO L226 Difference]: Without dead ends: 261 [2024-11-09 05:24:21,139 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 05:24:21,143 INFO L432 NwaCegarLoop]: 297 mSDtfsCounter, 348 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:21,144 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 506 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 05:24:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-09 05:24:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2024-11-09 05:24:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 188 states have (on average 1.398936170212766) internal successors, (263), 193 states have internal predecessors, (263), 44 states have call successors, (44), 22 states have call predecessors, (44), 20 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-11-09 05:24:21,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 347 transitions. [2024-11-09 05:24:21,245 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 347 transitions. Word has length 45 [2024-11-09 05:24:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:21,249 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 347 transitions. [2024-11-09 05:24:21,249 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 05:24:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 347 transitions. [2024-11-09 05:24:21,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 05:24:21,252 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:21,253 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 05:24:21,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 05:24:21,253 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:21,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:21,254 INFO L85 PathProgramCache]: Analyzing trace with hash -808259678, now seen corresponding path program 1 times [2024-11-09 05:24:21,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:21,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553596694] [2024-11-09 05:24:21,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:21,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:21,490 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 05:24:21,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:21,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553596694] [2024-11-09 05:24:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553596694] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:21,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:24:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746054255] [2024-11-09 05:24:21,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:21,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:24:21,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:21,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:24:21,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:24:21,494 INFO L87 Difference]: Start difference. First operand 254 states and 347 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 05:24:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:22,464 INFO L93 Difference]: Finished difference Result 656 states and 850 transitions. [2024-11-09 05:24:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:24:22,465 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 05:24:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:22,474 INFO L225 Difference]: With dead ends: 656 [2024-11-09 05:24:22,474 INFO L226 Difference]: Without dead ends: 524 [2024-11-09 05:24:22,475 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 05:24:22,479 INFO L432 NwaCegarLoop]: 378 mSDtfsCounter, 708 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:22,480 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 954 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 05:24:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-11-09 05:24:22,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 440. [2024-11-09 05:24:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 320 states have (on average 1.321875) internal successors, (423), 326 states have internal predecessors, (423), 71 states have call successors, (71), 45 states have call predecessors, (71), 47 states have return successors, (71), 70 states have call predecessors, (71), 67 states have call successors, (71) [2024-11-09 05:24:22,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 565 transitions. [2024-11-09 05:24:22,557 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 565 transitions. Word has length 45 [2024-11-09 05:24:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:22,559 INFO L471 AbstractCegarLoop]: Abstraction has 440 states and 565 transitions. [2024-11-09 05:24:22,559 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 05:24:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 565 transitions. [2024-11-09 05:24:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 05:24:22,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:22,561 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 05:24:22,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 05:24:22,564 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:22,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash 322504795, now seen corresponding path program 1 times [2024-11-09 05:24:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:22,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971819955] [2024-11-09 05:24:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:22,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:22,870 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 05:24:22,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:22,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971819955] [2024-11-09 05:24:22,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971819955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:22,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:22,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 05:24:22,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655750444] [2024-11-09 05:24:22,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:22,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:24:22,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:22,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:24:22,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 05:24:22,874 INFO L87 Difference]: Start difference. First operand 440 states and 565 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 05:24:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:23,793 INFO L93 Difference]: Finished difference Result 956 states and 1181 transitions. [2024-11-09 05:24:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 05:24:23,795 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 05:24:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:23,802 INFO L225 Difference]: With dead ends: 956 [2024-11-09 05:24:23,802 INFO L226 Difference]: Without dead ends: 654 [2024-11-09 05:24:23,803 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-09 05:24:23,807 INFO L432 NwaCegarLoop]: 165 mSDtfsCounter, 410 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:23,811 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 751 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:24:23,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2024-11-09 05:24:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 619. [2024-11-09 05:24:23,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 445 states have (on average 1.2921348314606742) internal successors, (575), 452 states have internal predecessors, (575), 98 states have call successors, (98), 68 states have call predecessors, (98), 74 states have return successors, (102), 100 states have call predecessors, (102), 94 states have call successors, (102) [2024-11-09 05:24:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 775 transitions. [2024-11-09 05:24:23,886 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 775 transitions. Word has length 46 [2024-11-09 05:24:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:23,887 INFO L471 AbstractCegarLoop]: Abstraction has 619 states and 775 transitions. [2024-11-09 05:24:23,887 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 05:24:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 775 transitions. [2024-11-09 05:24:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-09 05:24:23,889 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:23,889 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 05:24:23,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 05:24:23,890 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:23,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:23,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1181212883, now seen corresponding path program 1 times [2024-11-09 05:24:23,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:23,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637704236] [2024-11-09 05:24:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:23,949 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 05:24:23,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:23,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637704236] [2024-11-09 05:24:23,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637704236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:23,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:23,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:23,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550945588] [2024-11-09 05:24:23,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:23,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:23,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:23,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:23,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:23,957 INFO L87 Difference]: Start difference. First operand 619 states and 775 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 05:24:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:24,173 INFO L93 Difference]: Finished difference Result 1183 states and 1445 transitions. [2024-11-09 05:24:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:24,173 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 05:24:24,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:24,178 INFO L225 Difference]: With dead ends: 1183 [2024-11-09 05:24:24,178 INFO L226 Difference]: Without dead ends: 751 [2024-11-09 05:24:24,180 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 05:24:24,181 INFO L432 NwaCegarLoop]: 246 mSDtfsCounter, 67 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:24,182 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 461 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:24:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2024-11-09 05:24:24,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 646. [2024-11-09 05:24:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 468 states have (on average 1.2820512820512822) internal successors, (600), 475 states have internal predecessors, (600), 100 states have call successors, (100), 70 states have call predecessors, (100), 76 states have return successors, (104), 102 states have call predecessors, (104), 96 states have call successors, (104) [2024-11-09 05:24:24,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 804 transitions. [2024-11-09 05:24:24,305 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 804 transitions. Word has length 47 [2024-11-09 05:24:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:24,306 INFO L471 AbstractCegarLoop]: Abstraction has 646 states and 804 transitions. [2024-11-09 05:24:24,306 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 05:24:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 804 transitions. [2024-11-09 05:24:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 05:24:24,309 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:24,309 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] [2024-11-09 05:24:24,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 05:24:24,310 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:24,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:24,311 INFO L85 PathProgramCache]: Analyzing trace with hash -598402605, now seen corresponding path program 1 times [2024-11-09 05:24:24,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:24,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266581914] [2024-11-09 05:24:24,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:24,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:24,470 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 05:24:24,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:24,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266581914] [2024-11-09 05:24:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266581914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:24,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 05:24:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787906512] [2024-11-09 05:24:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:24,474 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 05:24:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 05:24:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 05:24:24,475 INFO L87 Difference]: Start difference. First operand 646 states and 804 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:24:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:25,347 INFO L93 Difference]: Finished difference Result 1239 states and 1732 transitions. [2024-11-09 05:24:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:24:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2024-11-09 05:24:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:25,356 INFO L225 Difference]: With dead ends: 1239 [2024-11-09 05:24:25,357 INFO L226 Difference]: Without dead ends: 1112 [2024-11-09 05:24:25,358 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 05:24:25,359 INFO L432 NwaCegarLoop]: 370 mSDtfsCounter, 932 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:25,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [932 Valid, 924 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-09 05:24:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2024-11-09 05:24:25,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1099. [2024-11-09 05:24:25,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 836 states have (on average 1.354066985645933) internal successors, (1132), 846 states have internal predecessors, (1132), 161 states have call successors, (161), 94 states have call predecessors, (161), 100 states have return successors, (203), 160 states have call predecessors, (203), 157 states have call successors, (203) [2024-11-09 05:24:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1496 transitions. [2024-11-09 05:24:25,494 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1496 transitions. Word has length 50 [2024-11-09 05:24:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:25,494 INFO L471 AbstractCegarLoop]: Abstraction has 1099 states and 1496 transitions. [2024-11-09 05:24:25,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 5 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-09 05:24:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1496 transitions. [2024-11-09 05:24:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-09 05:24:25,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:25,498 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 05:24:25,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 05:24:25,498 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:25,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1546280102, now seen corresponding path program 1 times [2024-11-09 05:24:25,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:25,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189327182] [2024-11-09 05:24:25,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:25,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:25,569 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 05:24:25,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:25,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189327182] [2024-11-09 05:24:25,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189327182] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:25,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:25,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:24:25,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481512201] [2024-11-09 05:24:25,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:25,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:24:25,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:25,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:24:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:24:25,572 INFO L87 Difference]: Start difference. First operand 1099 states and 1496 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 05:24:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:25,755 INFO L93 Difference]: Finished difference Result 1289 states and 1717 transitions. [2024-11-09 05:24:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:24:25,756 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 05:24:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:25,765 INFO L225 Difference]: With dead ends: 1289 [2024-11-09 05:24:25,765 INFO L226 Difference]: Without dead ends: 1016 [2024-11-09 05:24:25,766 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 05:24:25,768 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 253 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:25,770 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 309 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:24:25,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2024-11-09 05:24:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 907. [2024-11-09 05:24:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 696 states have (on average 1.3649425287356323) internal successors, (950), 704 states have internal predecessors, (950), 137 states have call successors, (137), 74 states have call predecessors, (137), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-09 05:24:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1258 transitions. [2024-11-09 05:24:25,878 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1258 transitions. Word has length 53 [2024-11-09 05:24:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:25,878 INFO L471 AbstractCegarLoop]: Abstraction has 907 states and 1258 transitions. [2024-11-09 05:24:25,879 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 05:24:25,879 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1258 transitions. [2024-11-09 05:24:25,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-09 05:24:25,880 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:25,880 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 05:24:25,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 05:24:25,881 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:25,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:25,882 INFO L85 PathProgramCache]: Analyzing trace with hash -339990536, now seen corresponding path program 1 times [2024-11-09 05:24:25,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:25,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876170473] [2024-11-09 05:24:25,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:25,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:25,996 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 05:24:25,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:25,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876170473] [2024-11-09 05:24:25,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876170473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:25,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:24:25,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 05:24:25,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365453982] [2024-11-09 05:24:25,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:25,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 05:24:25,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:25,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 05:24:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 05:24:26,000 INFO L87 Difference]: Start difference. First operand 907 states and 1258 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 05:24:26,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:24:26,391 INFO L93 Difference]: Finished difference Result 1010 states and 1374 transitions. [2024-11-09 05:24:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 05:24:26,392 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 05:24:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:24:26,398 INFO L225 Difference]: With dead ends: 1010 [2024-11-09 05:24:26,398 INFO L226 Difference]: Without dead ends: 1007 [2024-11-09 05:24:26,399 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 05:24:26,402 INFO L432 NwaCegarLoop]: 240 mSDtfsCounter, 463 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 05:24:26,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 280 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:24:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-11-09 05:24:26,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 906. [2024-11-09 05:24:26,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 696 states have (on average 1.360632183908046) internal successors, (947), 703 states have internal predecessors, (947), 136 states have call successors, (136), 74 states have call predecessors, (136), 72 states have return successors, (171), 130 states have call predecessors, (171), 133 states have call successors, (171) [2024-11-09 05:24:26,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 1254 transitions. [2024-11-09 05:24:26,515 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 1254 transitions. Word has length 54 [2024-11-09 05:24:26,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:24:26,515 INFO L471 AbstractCegarLoop]: Abstraction has 906 states and 1254 transitions. [2024-11-09 05:24:26,515 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 05:24:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 1254 transitions. [2024-11-09 05:24:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-09 05:24:26,517 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:24:26,517 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 05:24:26,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 05:24:26,517 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:24:26,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:24:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1950791397, now seen corresponding path program 1 times [2024-11-09 05:24:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:24:26,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548273648] [2024-11-09 05:24:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:24:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:26,682 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 05:24:26,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:24:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548273648] [2024-11-09 05:24:26,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548273648] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:24:26,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333023299] [2024-11-09 05:24:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:24:26,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:24:26,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:24:26,687 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:24:26,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 05:24:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:24:26,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:24:26,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:24:27,218 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 05:24:27,218 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:24:27,373 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 05:24:27,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333023299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:24:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727273879] [2024-11-09 05:24:27,405 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-09 05:24:27,405 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:24:27,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:24:27,416 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:24:27,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:24:32,613 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 151 for LOIs [2024-11-09 05:24:32,704 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 147 for LOIs [2024-11-09 05:24:32,855 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 155 for LOIs [2024-11-09 05:24:33,905 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 151 for LOIs [2024-11-09 05:24:34,076 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 151 for LOIs [2024-11-09 05:24:34,212 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 151 for LOIs [2024-11-09 05:24:34,263 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 158 for LOIs [2024-11-09 05:24:34,321 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:24:48,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [727273879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:24:48,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:24:48,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-09 05:24:48,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263068275] [2024-11-09 05:24:48,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:24:48,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-09 05:24:48,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:24:48,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-09 05:24:48,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-09 05:24:48,446 INFO L87 Difference]: Start difference. First operand 906 states and 1254 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 05:25:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:25:00,623 INFO L93 Difference]: Finished difference Result 1248 states and 1647 transitions. [2024-11-09 05:25:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 05:25:00,623 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 05:25:00,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:25:00,629 INFO L225 Difference]: With dead ends: 1248 [2024-11-09 05:25:00,629 INFO L226 Difference]: Without dead ends: 933 [2024-11-09 05:25:00,631 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-09 05:25:00,632 INFO L432 NwaCegarLoop]: 221 mSDtfsCounter, 140 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 2620 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-09 05:25:00,632 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1588 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2620 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-09 05:25:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 933 states. [2024-11-09 05:25:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 933 to 925. [2024-11-09 05:25:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 713 states have (on average 1.3562412342215988) internal successors, (967), 720 states have internal predecessors, (967), 137 states have call successors, (137), 75 states have call predecessors, (137), 73 states have return successors, (172), 131 states have call predecessors, (172), 134 states have call successors, (172) [2024-11-09 05:25:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 1276 transitions. [2024-11-09 05:25:00,764 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 1276 transitions. Word has length 55 [2024-11-09 05:25:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:25:00,765 INFO L471 AbstractCegarLoop]: Abstraction has 925 states and 1276 transitions. [2024-11-09 05:25:00,765 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 05:25:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 1276 transitions. [2024-11-09 05:25:00,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-09 05:25:00,768 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:25:00,768 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 05:25:00,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 05:25:00,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:25:00,969 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:25:00,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:25:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1495032518, now seen corresponding path program 1 times [2024-11-09 05:25:00,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:25:00,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450607231] [2024-11-09 05:25:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:25:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:01,033 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 05:25:01,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:25:01,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450607231] [2024-11-09 05:25:01,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450607231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:25:01,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:25:01,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:25:01,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344350598] [2024-11-09 05:25:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:25:01,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:25:01,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:25:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:25:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:25:01,037 INFO L87 Difference]: Start difference. First operand 925 states and 1276 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 05:25:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:25:01,288 INFO L93 Difference]: Finished difference Result 1206 states and 1598 transitions. [2024-11-09 05:25:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:25:01,289 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 05:25:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:25:01,296 INFO L225 Difference]: With dead ends: 1206 [2024-11-09 05:25:01,296 INFO L226 Difference]: Without dead ends: 1037 [2024-11-09 05:25:01,298 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 05:25:01,298 INFO L432 NwaCegarLoop]: 267 mSDtfsCounter, 42 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:25:01,299 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 498 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:25:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2024-11-09 05:25:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 960. [2024-11-09 05:25:01,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 742 states have (on average 1.3517520215633423) internal successors, (1003), 749 states have internal predecessors, (1003), 140 states have call successors, (140), 78 states have call predecessors, (140), 76 states have return successors, (175), 134 states have call predecessors, (175), 137 states have call successors, (175) [2024-11-09 05:25:01,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1318 transitions. [2024-11-09 05:25:01,462 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1318 transitions. Word has length 61 [2024-11-09 05:25:01,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:25:01,463 INFO L471 AbstractCegarLoop]: Abstraction has 960 states and 1318 transitions. [2024-11-09 05:25:01,463 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 05:25:01,463 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1318 transitions. [2024-11-09 05:25:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-09 05:25:01,467 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:25:01,467 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 05:25:01,467 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 05:25:01,468 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:25:01,468 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:25:01,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2142325908, now seen corresponding path program 1 times [2024-11-09 05:25:01,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:25:01,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394843578] [2024-11-09 05:25:01,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:01,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:25:01,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:01,871 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 05:25:01,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:25:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394843578] [2024-11-09 05:25:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394843578] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:25:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553402772] [2024-11-09 05:25:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:01,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:25:01,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:25:01,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:25:01,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 05:25:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:02,013 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 05:25:02,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:25:02,089 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 05:25:02,090 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:25:02,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553402772] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:25:02,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:25:02,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-09 05:25:02,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885496704] [2024-11-09 05:25:02,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:25:02,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:25:02,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:25:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:25:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:25:02,094 INFO L87 Difference]: Start difference. First operand 960 states and 1318 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 05:25:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:25:02,521 INFO L93 Difference]: Finished difference Result 1220 states and 1618 transitions. [2024-11-09 05:25:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 05:25:02,522 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 05:25:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:25:02,529 INFO L225 Difference]: With dead ends: 1220 [2024-11-09 05:25:02,530 INFO L226 Difference]: Without dead ends: 851 [2024-11-09 05:25:02,531 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 05:25:02,532 INFO L432 NwaCegarLoop]: 248 mSDtfsCounter, 210 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1000 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 05:25:02,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1000 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 05:25:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-11-09 05:25:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 847. [2024-11-09 05:25:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 667 states have (on average 1.3718140929535232) internal successors, (915), 674 states have internal predecessors, (915), 119 states have call successors, (119), 61 states have call predecessors, (119), 59 states have return successors, (154), 113 states have call predecessors, (154), 116 states have call successors, (154) [2024-11-09 05:25:02,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1188 transitions. [2024-11-09 05:25:02,669 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1188 transitions. Word has length 102 [2024-11-09 05:25:02,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:25:02,671 INFO L471 AbstractCegarLoop]: Abstraction has 847 states and 1188 transitions. [2024-11-09 05:25:02,671 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 05:25:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1188 transitions. [2024-11-09 05:25:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-09 05:25:02,676 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:25:02,676 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 05:25:02,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 05:25:02,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:25:02,877 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:25:02,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:25:02,877 INFO L85 PathProgramCache]: Analyzing trace with hash 748428430, now seen corresponding path program 1 times [2024-11-09 05:25:02,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:25:02,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746074492] [2024-11-09 05:25:02,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:02,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:25:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:03,117 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 05:25:03,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:25:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746074492] [2024-11-09 05:25:03,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746074492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:25:03,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39228868] [2024-11-09 05:25:03,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:25:03,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:25:03,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:25:03,119 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:25:03,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 05:25:03,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:25:03,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 05:25:03,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:25:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:25:03,642 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:25:03,808 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 05:25:03,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39228868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:25:03,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1920848218] [2024-11-09 05:25:03,812 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-09 05:25:03,812 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:25:03,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:25:03,813 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:25:03,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:25:17,842 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 189 for LOIs [2024-11-09 05:25:18,112 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 160 for LOIs [2024-11-09 05:25:18,369 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2024-11-09 05:25:18,399 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 174 for LOIs [2024-11-09 05:25:20,087 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2024-11-09 05:25:21,644 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 124 for LOIs [2024-11-09 05:25:21,783 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 168 for LOIs [2024-11-09 05:25:22,023 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 179 for LOIs [2024-11-09 05:25:22,325 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:25:58,228 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26956#(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) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (<= v_~q_free~0_44 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (<= 1 |#StackHeapBarrier|) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= v_~c_last_read~0_10 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (<= ~p_dw_pc~0 1) (= ~T4_E~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) (= ~m_i~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~E_2~0 2) (or (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (exists ((|v_ULTIMATE.start_eval1_~tmp~2#1_19| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp~2#1_19| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp~2#1_19| 0))))) (and (exists ((|v_ULTIMATE.start_eval1_~tmp___1~0#1_25| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___1~0#1_25| 1) (<= 0 |v_ULTIMATE.start_eval1_~tmp___1~0#1_25|))) (not (= ~p_dw_st~0 0)))) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 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) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-09 05:25:58,228 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:25:58,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:25:58,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-09 05:25:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603286629] [2024-11-09 05:25:58,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:25:58,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 05:25:58,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:25:58,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 05:25:58,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-09 05:25:58,232 INFO L87 Difference]: Start difference. First operand 847 states and 1188 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 05:26:02,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:02,042 INFO L93 Difference]: Finished difference Result 1787 states and 2275 transitions. [2024-11-09 05:26:02,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-09 05:26:02,043 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 05:26:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:02,052 INFO L225 Difference]: With dead ends: 1787 [2024-11-09 05:26:02,052 INFO L226 Difference]: Without dead ends: 1605 [2024-11-09 05:26:02,058 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4820 ImplicationChecksByTransitivity, 37.8s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-09 05:26:02,058 INFO L432 NwaCegarLoop]: 243 mSDtfsCounter, 1207 mSDsluCounter, 1530 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1773 SdHoareTripleChecker+Invalid, 2613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:02,059 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1773 Invalid, 2613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-09 05:26:02,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1605 states. [2024-11-09 05:26:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1605 to 1242. [2024-11-09 05:26:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 952 states have (on average 1.3130252100840336) internal successors, (1250), 959 states have internal predecessors, (1250), 177 states have call successors, (177), 113 states have call predecessors, (177), 111 states have return successors, (212), 171 states have call predecessors, (212), 174 states have call successors, (212) [2024-11-09 05:26:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1639 transitions. [2024-11-09 05:26:02,273 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1639 transitions. Word has length 104 [2024-11-09 05:26:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:02,273 INFO L471 AbstractCegarLoop]: Abstraction has 1242 states and 1639 transitions. [2024-11-09 05:26:02,274 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 05:26:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1639 transitions. [2024-11-09 05:26:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:26:02,277 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:02,277 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:02,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 05:26:02,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:02,481 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:02,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:02,482 INFO L85 PathProgramCache]: Analyzing trace with hash 833324002, now seen corresponding path program 1 times [2024-11-09 05:26:02,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786939444] [2024-11-09 05:26:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:02,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:26:02,627 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:02,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786939444] [2024-11-09 05:26:02,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786939444] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:02,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269734338] [2024-11-09 05:26:02,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:02,630 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:02,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 05:26:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:02,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:26:02,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-09 05:26:02,858 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:26:02,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269734338] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:02,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:26:02,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:26:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539183245] [2024-11-09 05:26:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:02,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:02,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:02,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:26:02,864 INFO L87 Difference]: Start difference. First operand 1242 states and 1639 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 05:26:03,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:03,213 INFO L93 Difference]: Finished difference Result 2386 states and 3439 transitions. [2024-11-09 05:26:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:03,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 96 [2024-11-09 05:26:03,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:03,225 INFO L225 Difference]: With dead ends: 2386 [2024-11-09 05:26:03,225 INFO L226 Difference]: Without dead ends: 1806 [2024-11-09 05:26:03,230 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 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 05:26:03,231 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 249 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:03,232 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 387 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2024-11-09 05:26:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1797. [2024-11-09 05:26:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1405 states have (on average 1.3523131672597866) internal successors, (1900), 1415 states have internal predecessors, (1900), 249 states have call successors, (249), 143 states have call predecessors, (249), 141 states have return successors, (318), 240 states have call predecessors, (318), 246 states have call successors, (318) [2024-11-09 05:26:03,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2467 transitions. [2024-11-09 05:26:03,525 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2467 transitions. Word has length 96 [2024-11-09 05:26:03,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:03,525 INFO L471 AbstractCegarLoop]: Abstraction has 1797 states and 2467 transitions. [2024-11-09 05:26:03,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 2 states have internal predecessors, (65), 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 05:26:03,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2467 transitions. [2024-11-09 05:26:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:26:03,529 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:03,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:03,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 05:26:03,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 05:26:03,730 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:03,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:03,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1336661762, now seen corresponding path program 1 times [2024-11-09 05:26:03,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:03,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954218610] [2024-11-09 05:26:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:03,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:26:03,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954218610] [2024-11-09 05:26:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954218610] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862650420] [2024-11-09 05:26:03,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:03,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:03,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:03,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:03,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 05:26:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:04,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:26:04,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-09 05:26:04,048 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:26:04,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862650420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:04,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:26:04,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:26:04,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213512788] [2024-11-09 05:26:04,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:04,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:04,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:04,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:04,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:26:04,050 INFO L87 Difference]: Start difference. First operand 1797 states and 2467 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 05:26:04,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:04,402 INFO L93 Difference]: Finished difference Result 4036 states and 5961 transitions. [2024-11-09 05:26:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:04,403 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 96 [2024-11-09 05:26:04,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:04,421 INFO L225 Difference]: With dead ends: 4036 [2024-11-09 05:26:04,421 INFO L226 Difference]: Without dead ends: 2901 [2024-11-09 05:26:04,427 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 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 05:26:04,428 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 252 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:04,428 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 387 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2901 states. [2024-11-09 05:26:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2901 to 2887. [2024-11-09 05:26:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2887 states, 2296 states have (on average 1.3806620209059233) internal successors, (3170), 2312 states have internal predecessors, (3170), 388 states have call successors, (388), 203 states have call predecessors, (388), 201 states have return successors, (521), 373 states have call predecessors, (521), 385 states have call successors, (521) [2024-11-09 05:26:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4079 transitions. [2024-11-09 05:26:04,826 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4079 transitions. Word has length 96 [2024-11-09 05:26:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:04,826 INFO L471 AbstractCegarLoop]: Abstraction has 2887 states and 4079 transitions. [2024-11-09 05:26:04,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 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 05:26:04,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4079 transitions. [2024-11-09 05:26:04,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:26:04,833 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:04,833 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:04,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 05:26:05,033 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 05:26:05,034 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:05,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:05,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1753927710, now seen corresponding path program 1 times [2024-11-09 05:26:05,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:05,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810397179] [2024-11-09 05:26:05,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:05,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:05,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 05:26:05,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810397179] [2024-11-09 05:26:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810397179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532633415] [2024-11-09 05:26:05,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:05,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:05,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:05,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 05:26:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:05,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:26:05,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:05,384 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-09 05:26:05,384 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:26:05,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532633415] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:05,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:26:05,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-09 05:26:05,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805147039] [2024-11-09 05:26:05,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:05,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:05,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:05,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:05,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:26:05,387 INFO L87 Difference]: Start difference. First operand 2887 states and 4079 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 05:26:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:05,993 INFO L93 Difference]: Finished difference Result 7276 states and 10864 transitions. [2024-11-09 05:26:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 96 [2024-11-09 05:26:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:06,024 INFO L225 Difference]: With dead ends: 7276 [2024-11-09 05:26:06,025 INFO L226 Difference]: Without dead ends: 5051 [2024-11-09 05:26:06,036 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 96 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 05:26:06,036 INFO L432 NwaCegarLoop]: 232 mSDtfsCounter, 243 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:06,037 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 382 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:06,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2024-11-09 05:26:06,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 5027. [2024-11-09 05:26:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 4048 states have (on average 1.3957509881422925) internal successors, (5650), 4076 states have internal predecessors, (5650), 656 states have call successors, (656), 323 states have call predecessors, (656), 321 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-09 05:26:06,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 7215 transitions. [2024-11-09 05:26:06,642 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 7215 transitions. Word has length 96 [2024-11-09 05:26:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:06,643 INFO L471 AbstractCegarLoop]: Abstraction has 5027 states and 7215 transitions. [2024-11-09 05:26:06,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 05:26:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 7215 transitions. [2024-11-09 05:26:06,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-11-09 05:26:06,652 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:06,652 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:26:06,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 05:26:06,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 05:26:06,853 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:06,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash 75127554, now seen corresponding path program 1 times [2024-11-09 05:26:06,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:06,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810947811] [2024-11-09 05:26:06,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:06,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-09 05:26:06,953 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:06,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810947811] [2024-11-09 05:26:06,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810947811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:06,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:06,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:26:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620608639] [2024-11-09 05:26:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:06,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:26:06,955 INFO L87 Difference]: Start difference. First operand 5027 states and 7215 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 05:26:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:07,655 INFO L93 Difference]: Finished difference Result 9575 states and 14206 transitions. [2024-11-09 05:26:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 96 [2024-11-09 05:26:07,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:07,697 INFO L225 Difference]: With dead ends: 9575 [2024-11-09 05:26:07,698 INFO L226 Difference]: Without dead ends: 6067 [2024-11-09 05:26:07,713 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 05:26:07,715 INFO L432 NwaCegarLoop]: 317 mSDtfsCounter, 80 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:07,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 556 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6067 states. [2024-11-09 05:26:08,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6067 to 5699. [2024-11-09 05:26:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5699 states, 4688 states have (on average 1.4219283276450512) internal successors, (6666), 4716 states have internal predecessors, (6666), 672 states have call successors, (672), 339 states have call predecessors, (672), 337 states have return successors, (925), 645 states have call predecessors, (925), 669 states have call successors, (925) [2024-11-09 05:26:08,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5699 states to 5699 states and 8263 transitions. [2024-11-09 05:26:08,298 INFO L78 Accepts]: Start accepts. Automaton has 5699 states and 8263 transitions. Word has length 96 [2024-11-09 05:26:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:08,298 INFO L471 AbstractCegarLoop]: Abstraction has 5699 states and 8263 transitions. [2024-11-09 05:26:08,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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 05:26:08,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5699 states and 8263 transitions. [2024-11-09 05:26:08,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-09 05:26:08,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:08,308 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 05:26:08,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 05:26:08,308 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:08,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:08,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1374680186, now seen corresponding path program 1 times [2024-11-09 05:26:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:08,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237191560] [2024-11-09 05:26:08,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:08,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:08,356 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 05:26:08,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:08,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237191560] [2024-11-09 05:26:08,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237191560] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:08,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:08,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:26:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517928611] [2024-11-09 05:26:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:08,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:26:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:26:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:26:08,359 INFO L87 Difference]: Start difference. First operand 5699 states and 8263 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 05:26:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:09,031 INFO L93 Difference]: Finished difference Result 6198 states and 8835 transitions. [2024-11-09 05:26:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:26:09,032 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 05:26:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:09,059 INFO L225 Difference]: With dead ends: 6198 [2024-11-09 05:26:09,060 INFO L226 Difference]: Without dead ends: 5689 [2024-11-09 05:26:09,064 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 05:26:09,064 INFO L432 NwaCegarLoop]: 272 mSDtfsCounter, 256 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:09,065 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 338 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:26:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5689 states. [2024-11-09 05:26:09,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5689 to 5680. [2024-11-09 05:26:09,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5680 states, 4671 states have (on average 1.4202526225647614) internal successors, (6634), 4699 states have internal predecessors, (6634), 671 states have call successors, (671), 338 states have call predecessors, (671), 336 states have return successors, (924), 644 states have call predecessors, (924), 668 states have call successors, (924) [2024-11-09 05:26:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5680 states to 5680 states and 8229 transitions. [2024-11-09 05:26:09,591 INFO L78 Accepts]: Start accepts. Automaton has 5680 states and 8229 transitions. Word has length 108 [2024-11-09 05:26:09,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:09,592 INFO L471 AbstractCegarLoop]: Abstraction has 5680 states and 8229 transitions. [2024-11-09 05:26:09,592 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 05:26:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 5680 states and 8229 transitions. [2024-11-09 05:26:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-09 05:26:09,602 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:09,602 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 05:26:09,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 05:26:09,603 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:09,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:09,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1317629776, now seen corresponding path program 1 times [2024-11-09 05:26:09,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:09,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119372704] [2024-11-09 05:26:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:09,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:09,865 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 05:26:09,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119372704] [2024-11-09 05:26:09,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119372704] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:09,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174158390] [2024-11-09 05:26:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:09,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:09,867 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:09,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 05:26:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:10,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 05:26:10,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:10,080 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 05:26:10,081 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:26:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174158390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:10,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:26:10,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-09 05:26:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537347081] [2024-11-09 05:26:10,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:10,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:26:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:26:10,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-09 05:26:10,083 INFO L87 Difference]: Start difference. First operand 5680 states and 8229 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 05:26:10,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:10,849 INFO L93 Difference]: Finished difference Result 6200 states and 8823 transitions. [2024-11-09 05:26:10,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 05:26:10,851 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 05:26:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:10,884 INFO L225 Difference]: With dead ends: 6200 [2024-11-09 05:26:10,884 INFO L226 Difference]: Without dead ends: 5651 [2024-11-09 05:26:10,889 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 05:26:10,889 INFO L432 NwaCegarLoop]: 261 mSDtfsCounter, 47 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:10,890 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1267 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:10,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2024-11-09 05:26:11,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 5591. [2024-11-09 05:26:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5591 states, 4610 states have (on average 1.4238611713665943) internal successors, (6564), 4638 states have internal predecessors, (6564), 656 states have call successors, (656), 325 states have call predecessors, (656), 323 states have return successors, (909), 629 states have call predecessors, (909), 653 states have call successors, (909) [2024-11-09 05:26:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5591 states to 5591 states and 8129 transitions. [2024-11-09 05:26:11,442 INFO L78 Accepts]: Start accepts. Automaton has 5591 states and 8129 transitions. Word has length 112 [2024-11-09 05:26:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:11,442 INFO L471 AbstractCegarLoop]: Abstraction has 5591 states and 8129 transitions. [2024-11-09 05:26:11,442 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 05:26:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 5591 states and 8129 transitions. [2024-11-09 05:26:11,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-09 05:26:11,453 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:11,453 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 05:26:11,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 05:26:11,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 05:26:11,655 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:11,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1236505509, now seen corresponding path program 1 times [2024-11-09 05:26:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209048427] [2024-11-09 05:26:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:11,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:11,816 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 05:26:11,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209048427] [2024-11-09 05:26:11,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209048427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:26:11,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:26:11,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 05:26:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819121819] [2024-11-09 05:26:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:26:11,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 05:26:11,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 05:26:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:26:11,819 INFO L87 Difference]: Start difference. First operand 5591 states and 8129 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 05:26:12,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:26:12,606 INFO L93 Difference]: Finished difference Result 6340 states and 8974 transitions. [2024-11-09 05:26:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 05:26:12,606 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 05:26:12,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:26:12,634 INFO L225 Difference]: With dead ends: 6340 [2024-11-09 05:26:12,635 INFO L226 Difference]: Without dead ends: 5883 [2024-11-09 05:26:12,640 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-11-09 05:26:12,640 INFO L432 NwaCegarLoop]: 266 mSDtfsCounter, 245 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 05:26:12,641 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [246 Valid, 1124 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 05:26:12,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5883 states. [2024-11-09 05:26:13,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5883 to 5849. [2024-11-09 05:26:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4772 states have (on average 1.413243922883487) internal successors, (6744), 4806 states have internal predecessors, (6744), 704 states have call successors, (704), 367 states have call predecessors, (704), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-09 05:26:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8417 transitions. [2024-11-09 05:26:13,351 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8417 transitions. Word has length 113 [2024-11-09 05:26:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:26:13,352 INFO L471 AbstractCegarLoop]: Abstraction has 5849 states and 8417 transitions. [2024-11-09 05:26:13,352 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 05:26:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8417 transitions. [2024-11-09 05:26:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-09 05:26:13,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:26:13,363 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 05:26:13,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 05:26:13,364 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:26:13,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:26:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash -709117283, now seen corresponding path program 1 times [2024-11-09 05:26:13,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:26:13,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234149556] [2024-11-09 05:26:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:13,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:26:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:14,385 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 05:26:14,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:26:14,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234149556] [2024-11-09 05:26:14,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234149556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:26:14,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446533092] [2024-11-09 05:26:14,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:26:14,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:26:14,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:26:14,388 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:26:14,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 05:26:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:26:14,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-09 05:26:14,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:26:15,679 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 05:26:15,679 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:26:17,552 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 05:26:17,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446533092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:26:17,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488050039] [2024-11-09 05:26:17,556 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-09 05:26:17,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:26:17,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:26:17,557 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:26:17,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:26:42,221 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 200 for LOIs [2024-11-09 05:26:42,383 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-09 05:26:42,384 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 05:26:42,388 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 164 for LOIs [2024-11-09 05:26:43,390 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 165 for LOIs [2024-11-09 05:26:44,158 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 05:26:44,192 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 158 for LOIs [2024-11-09 05:26:44,333 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 169 for LOIs [2024-11-09 05:26:44,478 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:26:57,700 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '131372#(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 05:26:57,700 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:26:57,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:26:57,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 50 [2024-11-09 05:26:57,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20043979] [2024-11-09 05:26:57,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:26:57,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-09 05:26:57,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:26:57,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-09 05:26:57,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=8884, Unknown=0, NotChecked=0, Total=9702 [2024-11-09 05:26:57,705 INFO L87 Difference]: Start difference. First operand 5849 states and 8417 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 05:27:07,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:07,739 INFO L93 Difference]: Finished difference Result 7972 states and 10989 transitions. [2024-11-09 05:27:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2024-11-09 05:27:07,739 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 05:27:07,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:07,769 INFO L225 Difference]: With dead ends: 7972 [2024-11-09 05:27:07,769 INFO L226 Difference]: Without dead ends: 7257 [2024-11-09 05:27:07,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 278 SyntacticMatches, 12 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 18450 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=5867, Invalid=43195, Unknown=0, NotChecked=0, Total=49062 [2024-11-09 05:27:07,787 INFO L432 NwaCegarLoop]: 236 mSDtfsCounter, 3222 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 4567 mSolverCounterSat, 1594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3222 SdHoareTripleChecker+Valid, 3602 SdHoareTripleChecker+Invalid, 6161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1594 IncrementalHoareTripleChecker+Valid, 4567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:07,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3222 Valid, 3602 Invalid, 6161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1594 Valid, 4567 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2024-11-09 05:27:07,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7257 states. [2024-11-09 05:27:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7257 to 5849. [2024-11-09 05:27:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 4772 states have (on average 1.4124056999161776) internal successors, (6740), 4806 states have internal predecessors, (6740), 704 states have call successors, (704), 367 states have call predecessors, (704), 371 states have return successors, (969), 677 states have call predecessors, (969), 701 states have call successors, (969) [2024-11-09 05:27:08,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8413 transitions. [2024-11-09 05:27:08,412 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8413 transitions. Word has length 114 [2024-11-09 05:27:08,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:08,413 INFO L471 AbstractCegarLoop]: Abstraction has 5849 states and 8413 transitions. [2024-11-09 05:27:08,413 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 05:27:08,414 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8413 transitions. [2024-11-09 05:27:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-09 05:27:08,426 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:08,426 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 05:27:08,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 05:27:08,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:08,631 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:08,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash -356029736, now seen corresponding path program 1 times [2024-11-09 05:27:08,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:08,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405650604] [2024-11-09 05:27:08,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:08,986 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 05:27:08,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405650604] [2024-11-09 05:27:08,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405650604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:08,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650171529] [2024-11-09 05:27:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:08,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:08,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:08,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:08,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 05:27:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:09,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 05:27:09,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:09,237 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 05:27:09,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:09,449 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 05:27:09,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650171529] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:09,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:27:09,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-09 05:27:09,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681101319] [2024-11-09 05:27:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:27:09,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 05:27:09,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:09,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 05:27:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-09 05:27:09,451 INFO L87 Difference]: Start difference. First operand 5849 states and 8413 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 05:27:10,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:27:10,666 INFO L93 Difference]: Finished difference Result 6721 states and 9422 transitions. [2024-11-09 05:27:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 05:27:10,666 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 05:27:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:27:10,692 INFO L225 Difference]: With dead ends: 6721 [2024-11-09 05:27:10,692 INFO L226 Difference]: Without dead ends: 6006 [2024-11-09 05:27:10,697 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 05:27:10,698 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 364 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:27:10,698 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [367 Valid, 742 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:27:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6006 states. [2024-11-09 05:27:11,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6006 to 5828. [2024-11-09 05:27:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5828 states, 4744 states have (on average 1.4133642495784149) internal successors, (6705), 4781 states have internal predecessors, (6705), 707 states have call successors, (707), 364 states have call predecessors, (707), 375 states have return successors, (988), 684 states have call predecessors, (988), 704 states have call successors, (988) [2024-11-09 05:27:11,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 8400 transitions. [2024-11-09 05:27:11,469 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 8400 transitions. Word has length 115 [2024-11-09 05:27:11,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:27:11,470 INFO L471 AbstractCegarLoop]: Abstraction has 5828 states and 8400 transitions. [2024-11-09 05:27:11,470 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 05:27:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 8400 transitions. [2024-11-09 05:27:11,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-09 05:27:11,486 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:27:11,486 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 05:27:11,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 05:27:11,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:11,691 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:27:11,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:27:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash 270019613, now seen corresponding path program 1 times [2024-11-09 05:27:11,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:27:11,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026054570] [2024-11-09 05:27:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:27:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:12,703 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 05:27:12,704 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:27:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026054570] [2024-11-09 05:27:12,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026054570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:27:12,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257689088] [2024-11-09 05:27:12,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:27:12,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:27:12,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:27:12,707 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:27:12,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 05:27:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:27:12,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-09 05:27:12,880 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:27:13,960 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 05:27:13,960 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:27:16,715 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 05:27:16,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257689088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:27:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143191156] [2024-11-09 05:27:16,718 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-09 05:27:16,719 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:27:16,719 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:27:16,719 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:27:16,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:27:29,488 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 201 for LOIs [2024-11-09 05:27:29,658 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-09 05:27:29,688 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-09 05:27:29,691 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 165 for LOIs [2024-11-09 05:27:30,584 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 166 for LOIs [2024-11-09 05:27:31,440 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-09 05:27:31,466 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 159 for LOIs [2024-11-09 05:27:31,607 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 170 for LOIs [2024-11-09 05:27:31,771 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:27:49,157 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '168266#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (= ~c_dr_pc~0 1) (exists ((v_~q_free~0_108 Int) (v_~q_req_up~0_109 Int)) (and (or (= ~p_dw_st~0 0) (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 (<= ~q_buf_0~0 2147483647) (= v_~q_req_up~0_109 1) (= v_~p_dw_st~0_140 1) (<= 0 (+ ~q_buf_0~0 2147483648)))) (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)))))) (or (and (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= v_~q_free~0_108 0)) (and (<= v_~q_free~0_108 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (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))' at error location [2024-11-09 05:27:49,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:27:49,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:27:49,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 59 [2024-11-09 05:27:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465965857] [2024-11-09 05:27:49,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:27:49,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-09 05:27:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:27:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-09 05:27:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1056, Invalid=11376, Unknown=0, NotChecked=0, Total=12432 [2024-11-09 05:27:49,162 INFO L87 Difference]: Start difference. First operand 5828 states and 8400 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 05:28:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:23,780 INFO L93 Difference]: Finished difference Result 9863 states and 13138 transitions. [2024-11-09 05:28:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 363 states. [2024-11-09 05:28:23,781 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 05:28:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:23,812 INFO L225 Difference]: With dead ends: 9863 [2024-11-09 05:28:23,812 INFO L226 Difference]: Without dead ends: 9172 [2024-11-09 05:28:23,853 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 362 SyntacticMatches, 3 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 96044 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=22485, Invalid=197007, Unknown=0, NotChecked=0, Total=219492 [2024-11-09 05:28:23,854 INFO L432 NwaCegarLoop]: 217 mSDtfsCounter, 8162 mSDsluCounter, 3706 mSDsCounter, 0 mSdLazyCounter, 8079 mSolverCounterSat, 4238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8165 SdHoareTripleChecker+Valid, 3923 SdHoareTripleChecker+Invalid, 12317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4238 IncrementalHoareTripleChecker+Valid, 8079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:23,854 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8165 Valid, 3923 Invalid, 12317 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4238 Valid, 8079 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2024-11-09 05:28:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9172 states. [2024-11-09 05:28:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9172 to 7338. [2024-11-09 05:28:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7338 states, 5803 states have (on average 1.3641220058590384) internal successors, (7916), 5852 states have internal predecessors, (7916), 934 states have call successors, (934), 552 states have call predecessors, (934), 599 states have return successors, (1271), 935 states have call predecessors, (1271), 931 states have call successors, (1271) [2024-11-09 05:28:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7338 states to 7338 states and 10121 transitions. [2024-11-09 05:28:25,049 INFO L78 Accepts]: Start accepts. Automaton has 7338 states and 10121 transitions. Word has length 124 [2024-11-09 05:28:25,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:25,050 INFO L471 AbstractCegarLoop]: Abstraction has 7338 states and 10121 transitions. [2024-11-09 05:28:25,050 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 05:28:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 7338 states and 10121 transitions. [2024-11-09 05:28:25,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-09 05:28:25,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:25,066 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 05:28:25,089 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 05:28:25,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:25,270 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:25,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:25,271 INFO L85 PathProgramCache]: Analyzing trace with hash 169413250, now seen corresponding path program 1 times [2024-11-09 05:28:25,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:25,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129728060] [2024-11-09 05:28:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:25,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:25,544 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 05:28:25,545 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129728060] [2024-11-09 05:28:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129728060] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651915684] [2024-11-09 05:28:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:25,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:25,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:25,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:25,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 05:28:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:25,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 05:28:25,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:25,829 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 05:28:25,829 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:26,031 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 05:28:26,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651915684] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:26,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 05:28:26,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-09 05:28:26,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899235750] [2024-11-09 05:28:26,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:26,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 05:28:26,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:26,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 05:28:26,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 05:28:26,034 INFO L87 Difference]: Start difference. First operand 7338 states and 10121 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 05:28:27,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:27,422 INFO L93 Difference]: Finished difference Result 7780 states and 10613 transitions. [2024-11-09 05:28:27,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-09 05:28:27,425 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 05:28:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:27,449 INFO L225 Difference]: With dead ends: 7780 [2024-11-09 05:28:27,449 INFO L226 Difference]: Without dead ends: 5043 [2024-11-09 05:28:27,458 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 05:28:27,459 INFO L432 NwaCegarLoop]: 197 mSDtfsCounter, 534 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:27,460 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 650 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 05:28:27,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5043 states. [2024-11-09 05:28:28,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5043 to 5043. [2024-11-09 05:28:28,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5043 states, 4208 states have (on average 1.4496197718631179) internal successors, (6100), 4234 states have internal predecessors, (6100), 578 states have call successors, (578), 257 states have call predecessors, (578), 256 states have return successors, (832), 552 states have call predecessors, (832), 576 states have call successors, (832) [2024-11-09 05:28:28,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5043 states to 5043 states and 7510 transitions. [2024-11-09 05:28:28,310 INFO L78 Accepts]: Start accepts. Automaton has 5043 states and 7510 transitions. Word has length 125 [2024-11-09 05:28:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:28,310 INFO L471 AbstractCegarLoop]: Abstraction has 5043 states and 7510 transitions. [2024-11-09 05:28:28,310 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 05:28:28,311 INFO L276 IsEmpty]: Start isEmpty. Operand 5043 states and 7510 transitions. [2024-11-09 05:28:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:28:28,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:28,325 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, 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] [2024-11-09 05:28:28,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 05:28:28,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:28,526 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:28,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:28,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1067579719, now seen corresponding path program 1 times [2024-11-09 05:28:28,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:28,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804973123] [2024-11-09 05:28:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:28,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:28,606 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 05:28:28,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:28,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804973123] [2024-11-09 05:28:28,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804973123] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:28,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:28,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:28:28,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732292095] [2024-11-09 05:28:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:28,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:28,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:28,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:28,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:28,609 INFO L87 Difference]: Start difference. First operand 5043 states and 7510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 05:28:29,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:29,681 INFO L93 Difference]: Finished difference Result 14940 states and 22667 transitions. [2024-11-09 05:28:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 129 [2024-11-09 05:28:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:29,724 INFO L225 Difference]: With dead ends: 14940 [2024-11-09 05:28:29,724 INFO L226 Difference]: Without dead ends: 9903 [2024-11-09 05:28:29,748 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 05:28:29,749 INFO L432 NwaCegarLoop]: 161 mSDtfsCounter, 158 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:29,749 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 311 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:29,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9903 states. [2024-11-09 05:28:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9903 to 9843. [2024-11-09 05:28:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9843 states, 8220 states have (on average 1.4369829683698296) internal successors, (11812), 8270 states have internal predecessors, (11812), 1110 states have call successors, (1110), 513 states have call predecessors, (1110), 512 states have return successors, (1588), 1060 states have call predecessors, (1588), 1108 states have call successors, (1588) [2024-11-09 05:28:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9843 states to 9843 states and 14510 transitions. [2024-11-09 05:28:31,029 INFO L78 Accepts]: Start accepts. Automaton has 9843 states and 14510 transitions. Word has length 129 [2024-11-09 05:28:31,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:31,030 INFO L471 AbstractCegarLoop]: Abstraction has 9843 states and 14510 transitions. [2024-11-09 05:28:31,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 05:28:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 9843 states and 14510 transitions. [2024-11-09 05:28:31,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-09 05:28:31,054 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:31,055 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, 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] [2024-11-09 05:28:31,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 05:28:31,055 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:31,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:31,056 INFO L85 PathProgramCache]: Analyzing trace with hash 918835616, now seen corresponding path program 1 times [2024-11-09 05:28:31,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:31,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349178488] [2024-11-09 05:28:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:31,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:31,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:31,137 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-09 05:28:31,137 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:31,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349178488] [2024-11-09 05:28:31,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349178488] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:28:31,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 05:28:31,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 05:28:31,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320285988] [2024-11-09 05:28:31,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:28:31,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:28:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:28:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:28:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 05:28:31,140 INFO L87 Difference]: Start difference. First operand 9843 states and 14510 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 05:28:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:28:33,296 INFO L93 Difference]: Finished difference Result 29164 states and 43751 transitions. [2024-11-09 05:28:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:28:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 129 [2024-11-09 05:28:33,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:28:33,378 INFO L225 Difference]: With dead ends: 29164 [2024-11-09 05:28:33,378 INFO L226 Difference]: Without dead ends: 19327 [2024-11-09 05:28:33,428 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 05:28:33,428 INFO L432 NwaCegarLoop]: 175 mSDtfsCounter, 161 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:28:33,429 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 325 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:28:33,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19327 states. [2024-11-09 05:28:35,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19327 to 19211. [2024-11-09 05:28:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19211 states, 16052 states have (on average 1.423623224520309) internal successors, (22852), 16150 states have internal predecessors, (22852), 2134 states have call successors, (2134), 1025 states have call predecessors, (2134), 1024 states have return successors, (3028), 2036 states have call predecessors, (3028), 2132 states have call successors, (3028) [2024-11-09 05:28:35,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19211 states to 19211 states and 28014 transitions. [2024-11-09 05:28:35,504 INFO L78 Accepts]: Start accepts. Automaton has 19211 states and 28014 transitions. Word has length 129 [2024-11-09 05:28:35,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:28:35,505 INFO L471 AbstractCegarLoop]: Abstraction has 19211 states and 28014 transitions. [2024-11-09 05:28:35,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 05:28:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 19211 states and 28014 transitions. [2024-11-09 05:28:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-09 05:28:35,561 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:28:35,562 INFO L215 NwaCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:28:35,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 05:28:35,562 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:28:35,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:28:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash 929452912, now seen corresponding path program 1 times [2024-11-09 05:28:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:28:35,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621527613] [2024-11-09 05:28:35,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:28:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:28:35,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:28:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621527613] [2024-11-09 05:28:35,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621527613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:28:35,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161719727] [2024-11-09 05:28:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:28:35,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:28:35,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:28:35,983 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:28:35,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 05:28:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:28:36,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-09 05:28:36,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:28:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 66 proven. 29 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-09 05:28:36,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 05:28:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 53 proven. 3 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-09 05:28:37,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161719727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 05:28:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1189560965] [2024-11-09 05:28:37,129 INFO L159 IcfgInterpreter]: Started Sifa with 79 locations of interest [2024-11-09 05:28:37,130 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 05:28:37,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 05:28:37,130 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 05:28:37,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 05:28:57,837 INFO L197 IcfgInterpreter]: Interpreting procedure error2 with input of size 145 for LOIs [2024-11-09 05:28:57,860 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 78 for LOIs [2024-11-09 05:28:57,906 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 1 for LOIs [2024-11-09 05:28:57,920 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 1 for LOIs [2024-11-09 05:28:57,920 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 114 for LOIs [2024-11-09 05:28:58,135 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 1 for LOIs [2024-11-09 05:28:58,241 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 184 for LOIs [2024-11-09 05:28:58,387 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 05:29:14,392 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '304667#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (<= 1 |#StackHeapBarrier|) (not (= ~E_6~0 1)) (= 0 ~t5_pc~0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| Int)) (and (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483648)) (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 2147483647) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_16| 0)))) (= ~p_last_write~0 0) (not (= ~T1_E~0 1)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t6_pc~0) (= 0 ~t3_pc~0) (exists ((|v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 2147483648)) (not (= |v_ULTIMATE.start_eval2_~tmp_ndt_1~0#1_17| 0)))) (not (= ~T5_E~0 1)) (not (= ~E_2~0 1)) (= ~q_req_up~0 0) (not (= ~T3_E~0 1)) (not (= ~T2_E~0 1)) (exists ((|v_ULTIMATE.start_eval2_~tmp~5#1_17| Int)) (and (<= |v_ULTIMATE.start_eval2_~tmp~5#1_17| 1) (not (= |v_ULTIMATE.start_eval2_~tmp~5#1_17| 0)) (<= 0 |v_ULTIMATE.start_eval2_~tmp~5#1_17|))) (not (= ~E_3~0 1)) (= ~q_ev~0 0) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= ~t6_i~0 1) (= ~p_dw_st~0 0) (not (= ~E_1~0 1)) (= ~t2_i~0 1) (= ~q_write_ev~0 0) (not (= ~M_E~0 1)) (= ~c_dr_pc~0 0) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (not (= ~T4_E~0 1)) (<= ~token~0 2147483647) (= ~t5_i~0 1) (= ~a_t~0 0) (= ~token~0 ~local~0) (not (= ~E_4~0 1)) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (not (= ~E_5~0 1)) (= ~t4_i~0 1) (<= 0 (+ ~token~0 2147483648)) (not (= ~T6_E~0 1)) (not (= ~E_M~0 1)))' at error location [2024-11-09 05:29:14,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 05:29:14,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 05:29:14,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 10] total 21 [2024-11-09 05:29:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489612582] [2024-11-09 05:29:14,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 05:29:14,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 05:29:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 05:29:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=4382, Unknown=0, NotChecked=0, Total=4830 [2024-11-09 05:29:14,395 INFO L87 Difference]: Start difference. First operand 19211 states and 28014 transitions. Second operand has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:29:23,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:23,330 INFO L93 Difference]: Finished difference Result 75915 states and 112830 transitions. [2024-11-09 05:29:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-09 05:29:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 149 [2024-11-09 05:29:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:23,525 INFO L225 Difference]: With dead ends: 75915 [2024-11-09 05:29:23,525 INFO L226 Difference]: Without dead ends: 56711 [2024-11-09 05:29:23,606 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 401 SyntacticMatches, 6 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1070, Invalid=9232, Unknown=0, NotChecked=0, Total=10302 [2024-11-09 05:29:23,607 INFO L432 NwaCegarLoop]: 127 mSDtfsCounter, 2518 mSDsluCounter, 903 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2518 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:23,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2518 Valid, 1030 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-09 05:29:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56711 states. [2024-11-09 05:29:30,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56711 to 50467. [2024-11-09 05:29:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50467 states, 42524 states have (on average 1.391684695701251) internal successors, (59180), 42766 states have internal predecessors, (59180), 5110 states have call successors, (5110), 2833 states have call predecessors, (5110), 2832 states have return successors, (7444), 4868 states have call predecessors, (7444), 5108 states have call successors, (7444) [2024-11-09 05:29:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50467 states to 50467 states and 71734 transitions. [2024-11-09 05:29:31,332 INFO L78 Accepts]: Start accepts. Automaton has 50467 states and 71734 transitions. Word has length 149 [2024-11-09 05:29:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:31,333 INFO L471 AbstractCegarLoop]: Abstraction has 50467 states and 71734 transitions. [2024-11-09 05:29:31,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 16.571428571428573) internal successors, (232), 16 states have internal predecessors, (232), 10 states have call successors, (39), 9 states have call predecessors, (39), 12 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-09 05:29:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 50467 states and 71734 transitions. [2024-11-09 05:29:31,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 05:29:31,432 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:31,433 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, 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 05:29:31,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 05:29:31,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-09 05:29:31,633 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:31,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:31,634 INFO L85 PathProgramCache]: Analyzing trace with hash 453333664, now seen corresponding path program 1 times [2024-11-09 05:29:31,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:31,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072032980] [2024-11-09 05:29:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:31,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-09 05:29:31,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072032980] [2024-11-09 05:29:31,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072032980] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:31,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781308683] [2024-11-09 05:29:31,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:31,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:31,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:31,798 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:31,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 05:29:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:32,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:29:32,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-09 05:29:32,232 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:29:32,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781308683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:29:32,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:29:32,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:29:32,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259453750] [2024-11-09 05:29:32,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:29:32,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:29:32,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:32,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:29:32,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:29:32,235 INFO L87 Difference]: Start difference. First operand 50467 states and 71734 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:29:40,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 05:29:40,034 INFO L93 Difference]: Finished difference Result 98991 states and 141285 transitions. [2024-11-09 05:29:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 05:29:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 151 [2024-11-09 05:29:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 05:29:40,219 INFO L225 Difference]: With dead ends: 98991 [2024-11-09 05:29:40,220 INFO L226 Difference]: Without dead ends: 61731 [2024-11-09 05:29:40,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 151 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 05:29:40,308 INFO L432 NwaCegarLoop]: 181 mSDtfsCounter, 151 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 05:29:40,309 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 219 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 05:29:40,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61731 states. [2024-11-09 05:29:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61731 to 60163. [2024-11-09 05:29:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60163 states, 51315 states have (on average 1.3629348143817597) internal successors, (69939), 51509 states have internal predecessors, (69939), 5368 states have call successors, (5368), 3475 states have call predecessors, (5368), 3479 states have return successors, (7821), 5179 states have call predecessors, (7821), 5366 states have call successors, (7821) [2024-11-09 05:29:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60163 states to 60163 states and 83128 transitions. [2024-11-09 05:29:48,546 INFO L78 Accepts]: Start accepts. Automaton has 60163 states and 83128 transitions. Word has length 151 [2024-11-09 05:29:48,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 05:29:48,547 INFO L471 AbstractCegarLoop]: Abstraction has 60163 states and 83128 transitions. [2024-11-09 05:29:48,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-11-09 05:29:48,547 INFO L276 IsEmpty]: Start isEmpty. Operand 60163 states and 83128 transitions. [2024-11-09 05:29:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-11-09 05:29:48,647 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 05:29:48,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:29:48,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-09 05:29:48,848 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 05:29:48,848 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-09 05:29:48,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 05:29:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 976654335, now seen corresponding path program 1 times [2024-11-09 05:29:48,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 05:29:48,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917387691] [2024-11-09 05:29:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 05:29:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-09 05:29:48,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 05:29:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917387691] [2024-11-09 05:29:48,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917387691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 05:29:48,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235648887] [2024-11-09 05:29:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 05:29:48,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 05:29:48,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 05:29:48,985 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 05:29:48,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35768348-79d5-4dbe-9fd8-3d8bb5a2f365/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 05:29:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 05:29:49,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 05:29:49,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 05:29:49,513 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-09 05:29:49,513 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 05:29:49,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235648887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 05:29:49,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 05:29:49,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2024-11-09 05:29:49,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906434285] [2024-11-09 05:29:49,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 05:29:49,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 05:29:49,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 05:29:49,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 05:29:49,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-09 05:29:49,517 INFO L87 Difference]: Start difference. First operand 60163 states and 83128 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)