./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E --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 dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:52:32,346 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:52:32,417 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:52:32,423 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:52:32,424 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:52:32,453 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:52:32,454 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:52:32,454 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:52:32,454 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:52:32,455 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:52:32,455 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:52:32,455 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:52:32,455 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:52:32,457 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:52:32,457 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:52:32,459 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:52:32,459 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:52:32,459 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:52:32,459 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:52:32,460 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:52:32,460 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:52:32,460 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:52:32,460 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:52:32,460 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:52:32,460 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:52:32,461 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:52:32,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:52:32,462 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:52:32,462 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:52:32,464 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:52:32,464 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:52:32,464 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:52:32,464 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E 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 -> dc8dc9bdb034e5a733c81076f9e42c36caa1eb5cb68a77287d3420bd964c5f5a [2024-11-14 04:52:32,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:52:32,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:52:32,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:52:32,856 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:52:32,858 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:52:32,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c Unable to find full path for "g++" [2024-11-14 04:52:35,172 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:52:35,578 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:52:35,579 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c [2024-11-14 04:52:35,597 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/data/044ae88ad/ed0169ebb413470d90c900156bf4c8c8/FLAGab56ffabd [2024-11-14 04:52:35,616 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/data/044ae88ad/ed0169ebb413470d90c900156bf4c8c8 [2024-11-14 04:52:35,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:52:35,621 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:52:35,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:52:35,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:52:35,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:52:35,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:52:35" (1/1) ... [2024-11-14 04:52:35,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35c7d421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:35, skipping insertion in model container [2024-11-14 04:52:35,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:52:35" (1/1) ... [2024-11-14 04:52:35,709 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:52:35,931 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_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2024-11-14 04:52:36,041 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_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2024-11-14 04:52:36,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:52:36,245 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:52:36,264 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_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[914,927] [2024-11-14 04:52:36,300 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_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.15.cil.c[7115,7128] [2024-11-14 04:52:36,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:52:36,412 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:52:36,413 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36 WrapperNode [2024-11-14 04:52:36,414 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:52:36,416 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:52:36,416 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:52:36,416 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:52:36,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,508 INFO L138 Inliner]: procedures = 79, calls = 97, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1112 [2024-11-14 04:52:36,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:52:36,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:52:36,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:52:36,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:52:36,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,526 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,590 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:52:36,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:52:36,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:52:36,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:52:36,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (1/1) ... [2024-11-14 04:52:36,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:52:36,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:52:36,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:52:36,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:52:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:52:36,717 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 04:52:36,717 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 04:52:36,718 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 04:52:36,718 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 04:52:36,719 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 04:52:36,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 04:52:36,719 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 04:52:36,719 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:52:36,719 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 04:52:36,719 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 04:52:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 04:52:36,720 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 04:52:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:52:36,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:52:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 04:52:36,720 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 04:52:36,720 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 04:52:36,720 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 04:52:36,959 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:52:36,961 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:52:38,905 INFO L? ?]: Removed 137 outVars from TransFormulas that were not future-live. [2024-11-14 04:52:38,907 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:52:39,803 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:52:39,804 INFO L316 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-14 04:52:39,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:52:39 BoogieIcfgContainer [2024-11-14 04:52:39,804 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:52:39,807 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:52:39,808 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:52:39,814 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:52:39,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:52:35" (1/3) ... [2024-11-14 04:52:39,815 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a789e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:52:39, skipping insertion in model container [2024-11-14 04:52:39,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:52:36" (2/3) ... [2024-11-14 04:52:39,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a789e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:52:39, skipping insertion in model container [2024-11-14 04:52:39,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:52:39" (3/3) ... [2024-11-14 04:52:39,820 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.15.cil.c [2024-11-14 04:52:39,844 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:52:39,849 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_2.cil-1+token_ring.15.cil.c that has 16 procedures, 291 locations, 1 initial locations, 20 loop locations, and 2 error locations. [2024-11-14 04:52:39,959 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:52:39,981 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;@49a9fa00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:52:39,981 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:52:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 230 states have (on average 1.517391304347826) internal successors, (349), 238 states have internal predecessors, (349), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2024-11-14 04:52:40,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 04:52:40,001 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:40,002 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] [2024-11-14 04:52:40,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:40,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:40,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1598542746, now seen corresponding path program 1 times [2024-11-14 04:52:40,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:40,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619005246] [2024-11-14 04:52:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:40,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:40,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619005246] [2024-11-14 04:52:40,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619005246] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:52:40,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:52:40,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:52:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781756892] [2024-11-14 04:52:40,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:52:40,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:52:40,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:52:40,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:52:40,635 INFO L87 Difference]: Start difference. First operand has 291 states, 230 states have (on average 1.517391304347826) internal successors, (349), 238 states have internal predecessors, (349), 43 states have call successors, (43), 15 states have call predecessors, (43), 15 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) 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) [2024-11-14 04:52:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:42,496 INFO L93 Difference]: Finished difference Result 1001 states and 1468 transitions. [2024-11-14 04:52:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:52:42,500 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 [2024-11-14 04:52:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:42,532 INFO L225 Difference]: With dead ends: 1001 [2024-11-14 04:52:42,532 INFO L226 Difference]: Without dead ends: 696 [2024-11-14 04:52:42,542 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-14 04:52:42,545 INFO L432 NwaCegarLoop]: 472 mSDtfsCounter, 1141 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 1245 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:42,546 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1148 Valid, 1245 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-11-14 04:52:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2024-11-14 04:52:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 625. [2024-11-14 04:52:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 464 states have (on average 1.3663793103448276) internal successors, (634), 469 states have internal predecessors, (634), 98 states have call successors, (98), 63 states have call predecessors, (98), 61 states have return successors, (109), 94 states have call predecessors, (109), 94 states have call successors, (109) [2024-11-14 04:52:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 841 transitions. [2024-11-14 04:52:42,759 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 841 transitions. Word has length 45 [2024-11-14 04:52:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:42,760 INFO L471 AbstractCegarLoop]: Abstraction has 625 states and 841 transitions. [2024-11-14 04:52:42,760 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) [2024-11-14 04:52:42,760 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 841 transitions. [2024-11-14 04:52:42,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:52:42,763 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:42,763 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] [2024-11-14 04:52:42,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:52:42,764 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:42,764 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:42,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1668907918, now seen corresponding path program 1 times [2024-11-14 04:52:42,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:42,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566520027] [2024-11-14 04:52:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:42,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:43,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:43,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566520027] [2024-11-14 04:52:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566520027] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:52:43,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:52:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:52:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016538306] [2024-11-14 04:52:43,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:52:43,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:52:43,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:43,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:52:43,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:52:43,416 INFO L87 Difference]: Start difference. First operand 625 states and 841 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) [2024-11-14 04:52:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:45,079 INFO L93 Difference]: Finished difference Result 1386 states and 1788 transitions. [2024-11-14 04:52:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:52:45,080 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 [2024-11-14 04:52:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:45,090 INFO L225 Difference]: With dead ends: 1386 [2024-11-14 04:52:45,090 INFO L226 Difference]: Without dead ends: 983 [2024-11-14 04:52:45,092 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:52:45,093 INFO L432 NwaCegarLoop]: 237 mSDtfsCounter, 585 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1056 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:45,094 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1101 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1056 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:52:45,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2024-11-14 04:52:45,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 954. [2024-11-14 04:52:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 687 states have (on average 1.3173216885007277) internal successors, (905), 693 states have internal predecessors, (905), 154 states have call successors, (154), 111 states have call predecessors, (154), 111 states have return successors, (183), 151 states have call predecessors, (183), 150 states have call successors, (183) [2024-11-14 04:52:45,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1242 transitions. [2024-11-14 04:52:45,225 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1242 transitions. Word has length 46 [2024-11-14 04:52:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:45,226 INFO L471 AbstractCegarLoop]: Abstraction has 954 states and 1242 transitions. [2024-11-14 04:52:45,226 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) [2024-11-14 04:52:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1242 transitions. [2024-11-14 04:52:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:52:45,229 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:45,229 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] [2024-11-14 04:52:45,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:52:45,229 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:45,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash -423541181, now seen corresponding path program 1 times [2024-11-14 04:52:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842258932] [2024-11-14 04:52:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:45,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:45,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842258932] [2024-11-14 04:52:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842258932] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:52:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:52:45,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:52:45,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502764323] [2024-11-14 04:52:45,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:52:45,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:52:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:45,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:52:45,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:52:45,370 INFO L87 Difference]: Start difference. First operand 954 states and 1242 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) [2024-11-14 04:52:45,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:45,772 INFO L93 Difference]: Finished difference Result 1895 states and 2401 transitions. [2024-11-14 04:52:45,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:52:45,772 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 [2024-11-14 04:52:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:45,787 INFO L225 Difference]: With dead ends: 1895 [2024-11-14 04:52:45,790 INFO L226 Difference]: Without dead ends: 1213 [2024-11-14 04:52:45,792 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 [2024-11-14 04:52:45,794 INFO L432 NwaCegarLoop]: 359 mSDtfsCounter, 68 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:45,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 690 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:52:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2024-11-14 04:52:46,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1191. [2024-11-14 04:52:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 848 states have (on average 1.2959905660377358) internal successors, (1099), 854 states have internal predecessors, (1099), 196 states have call successors, (196), 149 states have call predecessors, (196), 145 states have return successors, (229), 189 states have call predecessors, (229), 192 states have call successors, (229) [2024-11-14 04:52:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 1524 transitions. [2024-11-14 04:52:46,030 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 1524 transitions. Word has length 47 [2024-11-14 04:52:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:46,031 INFO L471 AbstractCegarLoop]: Abstraction has 1191 states and 1524 transitions. [2024-11-14 04:52:46,032 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) [2024-11-14 04:52:46,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 1524 transitions. [2024-11-14 04:52:46,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 04:52:46,034 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:46,035 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] [2024-11-14 04:52:46,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:52:46,035 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:46,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 930286826, now seen corresponding path program 1 times [2024-11-14 04:52:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:46,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393368599] [2024-11-14 04:52:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:46,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:52:46,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:46,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393368599] [2024-11-14 04:52:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393368599] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:52:46,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:52:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:52:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114309660] [2024-11-14 04:52:46,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:52:46,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:52:46,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:46,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:52:46,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:52:46,129 INFO L87 Difference]: Start difference. First operand 1191 states and 1524 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) [2024-11-14 04:52:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:46,436 INFO L93 Difference]: Finished difference Result 1597 states and 2014 transitions. [2024-11-14 04:52:46,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:52:46,438 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 [2024-11-14 04:52:46,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:46,449 INFO L225 Difference]: With dead ends: 1597 [2024-11-14 04:52:46,449 INFO L226 Difference]: Without dead ends: 1042 [2024-11-14 04:52:46,455 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 [2024-11-14 04:52:46,456 INFO L432 NwaCegarLoop]: 360 mSDtfsCounter, 387 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:46,457 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 422 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:52:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2024-11-14 04:52:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 836. [2024-11-14 04:52:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 612 states have (on average 1.3006535947712419) internal successors, (796), 617 states have internal predecessors, (796), 133 states have call successors, (133), 95 states have call predecessors, (133), 89 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2024-11-14 04:52:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1066 transitions. [2024-11-14 04:52:46,577 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1066 transitions. Word has length 53 [2024-11-14 04:52:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:46,577 INFO L471 AbstractCegarLoop]: Abstraction has 836 states and 1066 transitions. [2024-11-14 04:52:46,578 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) [2024-11-14 04:52:46,578 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1066 transitions. [2024-11-14 04:52:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 04:52:46,580 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:46,581 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] [2024-11-14 04:52:46,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:52:46,581 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:46,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1223386993, now seen corresponding path program 1 times [2024-11-14 04:52:46,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:46,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195086067] [2024-11-14 04:52:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:46,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:46,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:46,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195086067] [2024-11-14 04:52:46,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195086067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:52:46,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:52:46,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:52:46,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941409046] [2024-11-14 04:52:46,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:52:46,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:52:46,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:52:46,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:52:46,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:52:46,741 INFO L87 Difference]: Start difference. First operand 836 states and 1066 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) [2024-11-14 04:52:47,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:52:47,386 INFO L93 Difference]: Finished difference Result 1091 states and 1367 transitions. [2024-11-14 04:52:47,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:52:47,387 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 [2024-11-14 04:52:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:52:47,400 INFO L225 Difference]: With dead ends: 1091 [2024-11-14 04:52:47,401 INFO L226 Difference]: Without dead ends: 1088 [2024-11-14 04:52:47,402 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 [2024-11-14 04:52:47,403 INFO L432 NwaCegarLoop]: 355 mSDtfsCounter, 705 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:52:47,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 398 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:52:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2024-11-14 04:52:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 835. [2024-11-14 04:52:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 612 states have (on average 1.2908496732026145) internal successors, (790), 616 states have internal predecessors, (790), 132 states have call successors, (132), 95 states have call predecessors, (132), 89 states have return successors, (137), 125 states have call predecessors, (137), 129 states have call successors, (137) [2024-11-14 04:52:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 1059 transitions. [2024-11-14 04:52:47,532 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 1059 transitions. Word has length 54 [2024-11-14 04:52:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:52:47,535 INFO L471 AbstractCegarLoop]: Abstraction has 835 states and 1059 transitions. [2024-11-14 04:52:47,535 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) [2024-11-14 04:52:47,535 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 1059 transitions. [2024-11-14 04:52:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-14 04:52:47,538 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:52:47,538 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] [2024-11-14 04:52:47,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:52:47,538 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:52:47,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:52:47,542 INFO L85 PathProgramCache]: Analyzing trace with hash 728187403, now seen corresponding path program 1 times [2024-11-14 04:52:47,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:52:47,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229321263] [2024-11-14 04:52:47,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:52:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:47,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:52:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229321263] [2024-11-14 04:52:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229321263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:52:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75506747] [2024-11-14 04:52:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:52:47,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:52:47,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:52:47,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:52:47,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:52:48,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:52:48,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:52:48,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:52:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:48,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:52:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:52:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75506747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:52:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1060991332] [2024-11-14 04:52:48,760 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2024-11-14 04:52:48,760 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:52:48,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:52:48,770 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:52:48,771 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:52:59,120 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 221 for LOIs [2024-11-14 04:52:59,322 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 217 for LOIs [2024-11-14 04:52:59,460 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 225 for LOIs [2024-11-14 04:53:01,007 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 221 for LOIs [2024-11-14 04:53:01,265 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 221 for LOIs [2024-11-14 04:53:01,664 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 221 for LOIs [2024-11-14 04:53:01,774 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 228 for LOIs [2024-11-14 04:53:01,918 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:53:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1060991332] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:53:31,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:53:31,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [5, 5, 4] total 36 [2024-11-14 04:53:31,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249000484] [2024-11-14 04:53:31,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:53:31,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 04:53:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:53:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 04:53:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:53:31,307 INFO L87 Difference]: Start difference. First operand 835 states and 1059 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) [2024-11-14 04:53:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:53:59,613 INFO L93 Difference]: Finished difference Result 1474 states and 1815 transitions. [2024-11-14 04:53:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 04:53:59,614 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 [2024-11-14 04:53:59,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:53:59,625 INFO L225 Difference]: With dead ends: 1474 [2024-11-14 04:53:59,625 INFO L226 Difference]: Without dead ends: 861 [2024-11-14 04:53:59,629 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 04:53:59,631 INFO L432 NwaCegarLoop]: 335 mSDtfsCounter, 93 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 4035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:53:59,634 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1910 Invalid, 4035 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2024-11-14 04:53:59,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2024-11-14 04:53:59,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 853. [2024-11-14 04:53:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 628 states have (on average 1.286624203821656) internal successors, (808), 632 states have internal predecessors, (808), 133 states have call successors, (133), 96 states have call predecessors, (133), 90 states have return successors, (138), 126 states have call predecessors, (138), 130 states have call successors, (138) [2024-11-14 04:53:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1079 transitions. [2024-11-14 04:53:59,819 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1079 transitions. Word has length 55 [2024-11-14 04:53:59,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:53:59,820 INFO L471 AbstractCegarLoop]: Abstraction has 853 states and 1079 transitions. [2024-11-14 04:53:59,820 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) [2024-11-14 04:53:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1079 transitions. [2024-11-14 04:53:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-14 04:53:59,822 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:53:59,822 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] [2024-11-14 04:53:59,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:54:00,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:00,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:00,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:00,028 INFO L85 PathProgramCache]: Analyzing trace with hash 722385543, now seen corresponding path program 1 times [2024-11-14 04:54:00,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:00,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201316276] [2024-11-14 04:54:00,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:00,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:00,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201316276] [2024-11-14 04:54:00,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201316276] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:00,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:00,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:54:00,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047581151] [2024-11-14 04:54:00,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:00,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:00,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:54:00,178 INFO L87 Difference]: Start difference. First operand 853 states and 1079 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) [2024-11-14 04:54:00,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:00,546 INFO L93 Difference]: Finished difference Result 1435 states and 1762 transitions. [2024-11-14 04:54:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:00,547 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 [2024-11-14 04:54:00,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:00,556 INFO L225 Difference]: With dead ends: 1435 [2024-11-14 04:54:00,556 INFO L226 Difference]: Without dead ends: 1062 [2024-11-14 04:54:00,559 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 [2024-11-14 04:54:00,560 INFO L432 NwaCegarLoop]: 381 mSDtfsCounter, 43 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:00,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 726 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:54:00,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2024-11-14 04:54:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 974. [2024-11-14 04:54:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 709 states have (on average 1.2708039492242595) internal successors, (901), 717 states have internal predecessors, (901), 155 states have call successors, (155), 118 states have call predecessors, (155), 108 states have return successors, (160), 140 states have call predecessors, (160), 152 states have call successors, (160) [2024-11-14 04:54:00,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1216 transitions. [2024-11-14 04:54:00,767 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1216 transitions. Word has length 61 [2024-11-14 04:54:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:00,767 INFO L471 AbstractCegarLoop]: Abstraction has 974 states and 1216 transitions. [2024-11-14 04:54:00,768 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) [2024-11-14 04:54:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1216 transitions. [2024-11-14 04:54:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-11-14 04:54:00,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:00,771 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:00,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-14 04:54:00,771 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:00,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:00,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1991374773, now seen corresponding path program 1 times [2024-11-14 04:54:00,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:00,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016430695] [2024-11-14 04:54:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:00,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:54:01,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:01,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016430695] [2024-11-14 04:54:01,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016430695] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:01,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:54:01,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:54:01,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337203489] [2024-11-14 04:54:01,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:01,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:54:01,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:01,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:54:01,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:54:01,057 INFO L87 Difference]: Start difference. First operand 974 states and 1216 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2024-11-14 04:54:02,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:02,586 INFO L93 Difference]: Finished difference Result 1987 states and 2858 transitions. [2024-11-14 04:54:02,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:54:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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 71 [2024-11-14 04:54:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:02,601 INFO L225 Difference]: With dead ends: 1987 [2024-11-14 04:54:02,601 INFO L226 Difference]: Without dead ends: 1776 [2024-11-14 04:54:02,605 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 [2024-11-14 04:54:02,607 INFO L432 NwaCegarLoop]: 593 mSDtfsCounter, 1624 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1564 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:02,607 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 1564 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:54:02,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1776 states. [2024-11-14 04:54:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1776 to 1763. [2024-11-14 04:54:02,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1385 states have (on average 1.3783393501805055) internal successors, (1909), 1396 states have internal predecessors, (1909), 244 states have call successors, (244), 142 states have call predecessors, (244), 132 states have return successors, (315), 226 states have call predecessors, (315), 241 states have call successors, (315) [2024-11-14 04:54:02,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2468 transitions. [2024-11-14 04:54:02,902 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2468 transitions. Word has length 71 [2024-11-14 04:54:02,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:02,902 INFO L471 AbstractCegarLoop]: Abstraction has 1763 states and 2468 transitions. [2024-11-14 04:54:02,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 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) [2024-11-14 04:54:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2468 transitions. [2024-11-14 04:54:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 04:54:02,906 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:02,907 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] [2024-11-14 04:54:02,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-14 04:54:02,907 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:02,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:02,908 INFO L85 PathProgramCache]: Analyzing trace with hash -881949483, now seen corresponding path program 1 times [2024-11-14 04:54:02,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:02,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379033128] [2024-11-14 04:54:02,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:02,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-14 04:54:03,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379033128] [2024-11-14 04:54:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379033128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953834194] [2024-11-14 04:54:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:03,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:03,483 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:03,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:54:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:03,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 04:54:03,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:54:03,788 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953834194] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:03,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:54:03,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2024-11-14 04:54:03,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740055120] [2024-11-14 04:54:03,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:03,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:54:03,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:03,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:54:03,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:54:03,791 INFO L87 Difference]: Start difference. First operand 1763 states and 2468 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) [2024-11-14 04:54:04,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:04,529 INFO L93 Difference]: Finished difference Result 2310 states and 3119 transitions. [2024-11-14 04:54:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:54:04,530 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 [2024-11-14 04:54:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:04,544 INFO L225 Difference]: With dead ends: 2310 [2024-11-14 04:54:04,544 INFO L226 Difference]: Without dead ends: 1558 [2024-11-14 04:54:04,547 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 [2024-11-14 04:54:04,549 INFO L432 NwaCegarLoop]: 362 mSDtfsCounter, 343 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:04,550 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1383 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:54:04,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2024-11-14 04:54:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1535. [2024-11-14 04:54:04,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1243 states have (on average 1.4038616251005631) internal successors, (1745), 1252 states have internal predecessors, (1745), 196 states have call successors, (196), 100 states have call predecessors, (196), 94 states have return successors, (263), 184 states have call predecessors, (263), 193 states have call successors, (263) [2024-11-14 04:54:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 2204 transitions. [2024-11-14 04:54:04,846 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 2204 transitions. Word has length 102 [2024-11-14 04:54:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:04,848 INFO L471 AbstractCegarLoop]: Abstraction has 1535 states and 2204 transitions. [2024-11-14 04:54:04,849 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) [2024-11-14 04:54:04,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 2204 transitions. [2024-11-14 04:54:04,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:54:04,855 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:04,855 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:54:04,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:54:05,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:05,056 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:05,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1387936958, now seen corresponding path program 1 times [2024-11-14 04:54:05,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:05,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859455939] [2024-11-14 04:54:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:05,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-14 04:54:05,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:05,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859455939] [2024-11-14 04:54:05,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859455939] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:05,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550357197] [2024-11-14 04:54:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:05,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:05,397 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:05,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:54:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:05,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 04:54:05,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:54:05,694 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:54:05,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550357197] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:54:05,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:54:05,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2024-11-14 04:54:05,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898566451] [2024-11-14 04:54:05,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:54:05,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:54:05,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:54:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:54:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:54:05,699 INFO L87 Difference]: Start difference. First operand 1535 states and 2204 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:54:06,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:54:06,104 INFO L93 Difference]: Finished difference Result 1834 states and 2562 transitions. [2024-11-14 04:54:06,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:54:06,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 104 [2024-11-14 04:54:06,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:54:06,116 INFO L225 Difference]: With dead ends: 1834 [2024-11-14 04:54:06,116 INFO L226 Difference]: Without dead ends: 1384 [2024-11-14 04:54:06,118 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:54:06,119 INFO L432 NwaCegarLoop]: 383 mSDtfsCounter, 53 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:54:06,120 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 711 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:54:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2024-11-14 04:54:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1268. [2024-11-14 04:54:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1053 states have (on average 1.435897435897436) internal successors, (1512), 1060 states have internal predecessors, (1512), 154 states have call successors, (154), 61 states have call predecessors, (154), 59 states have return successors, (217), 148 states have call predecessors, (217), 151 states have call successors, (217) [2024-11-14 04:54:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1883 transitions. [2024-11-14 04:54:06,332 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1883 transitions. Word has length 104 [2024-11-14 04:54:06,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:54:06,333 INFO L471 AbstractCegarLoop]: Abstraction has 1268 states and 1883 transitions. [2024-11-14 04:54:06,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-11-14 04:54:06,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1883 transitions. [2024-11-14 04:54:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 04:54:06,336 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:54:06,336 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] [2024-11-14 04:54:06,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:54:06,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:54:06,537 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:54:06,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:54:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1787928157, now seen corresponding path program 1 times [2024-11-14 04:54:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:54:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519678491] [2024-11-14 04:54:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:54:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:54:06,851 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:54:06,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519678491] [2024-11-14 04:54:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519678491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:54:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870259210] [2024-11-14 04:54:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:54:06,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:54:06,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:54:06,856 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:54:06,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:54:07,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:54:07,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-14 04:54:07,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:54:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:54:07,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:54:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-14 04:54:07,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870259210] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:54:07,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [436569671] [2024-11-14 04:54:07,820 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2024-11-14 04:54:07,823 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:54:07,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:54:07,824 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:54:07,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:54:39,105 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 259 for LOIs [2024-11-14 04:54:39,682 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 230 for LOIs [2024-11-14 04:54:40,505 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 180 for LOIs [2024-11-14 04:54:40,564 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 244 for LOIs [2024-11-14 04:54:44,564 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 245 for LOIs [2024-11-14 04:54:48,340 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 194 for LOIs [2024-11-14 04:54:48,638 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 238 for LOIs [2024-11-14 04:54:49,250 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 249 for LOIs [2024-11-14 04:54:49,789 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:55:18,493 WARN L286 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 257 DAG size of output: 208 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:55:24,960 WARN L286 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 257 DAG size of output: 208 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 04:56:18,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39963#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((v_~c_last_read~0_10 Int) (v_~q_free~0_44 Int)) (and (= ~E_12~0 2) (<= 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) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (<= ~q_buf_0~0 2147483647) (= 0 ~t8_pc~0) (<= ~p_dw_pc~0 1) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (<= 0 (+ ~p_last_write~0 2147483648)) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (= ~t11_pc~0 0) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~t12_pc~0 0) (= ~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) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (= ~E_9~0 2) (<= 0 v_~q_free~0_44) (not (= v_~q_free~0_44 1)) (= ~t1_i~0 0))) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_16| Int)) (and (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 0)) (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_16| 2147483648)))) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_dr_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (= ~c_dr_st~0 1))' at error location [2024-11-14 04:56:18,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:56:18,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:56:18,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 13 [2024-11-14 04:56:18,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278881398] [2024-11-14 04:56:18,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:56:18,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:56:18,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:18,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:56:18,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2973, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:56:18,770 INFO L87 Difference]: Start difference. First operand 1268 states and 1883 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) [2024-11-14 04:56:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:23,592 INFO L93 Difference]: Finished difference Result 2208 states and 2970 transitions. [2024-11-14 04:56:23,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-14 04:56:23,593 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 [2024-11-14 04:56:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:23,605 INFO L225 Difference]: With dead ends: 2208 [2024-11-14 04:56:23,605 INFO L226 Difference]: Without dead ends: 2026 [2024-11-14 04:56:23,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 272 SyntacticMatches, 8 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 4816 ImplicationChecksByTransitivity, 91.4s TimeCoverageRelationStatistics Valid=1088, Invalid=12252, Unknown=0, NotChecked=0, Total=13340 [2024-11-14 04:56:23,612 INFO L432 NwaCegarLoop]: 316 mSDtfsCounter, 1288 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 2698 mSolverCounterSat, 418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1293 SdHoareTripleChecker+Valid, 2234 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 2698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:23,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1293 Valid, 2234 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 2698 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-11-14 04:56:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2024-11-14 04:56:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1663. [2024-11-14 04:56:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1338 states have (on average 1.3804185351270553) internal successors, (1847), 1345 states have internal predecessors, (1847), 212 states have call successors, (212), 113 states have call predecessors, (212), 111 states have return successors, (275), 206 states have call predecessors, (275), 209 states have call successors, (275) [2024-11-14 04:56:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2334 transitions. [2024-11-14 04:56:23,932 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2334 transitions. Word has length 104 [2024-11-14 04:56:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:23,933 INFO L471 AbstractCegarLoop]: Abstraction has 1663 states and 2334 transitions. [2024-11-14 04:56:23,933 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) [2024-11-14 04:56:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2334 transitions. [2024-11-14 04:56:23,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-14 04:56:23,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:23,941 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] [2024-11-14 04:56:23,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:56:24,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:24,142 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:24,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1876554021, now seen corresponding path program 1 times [2024-11-14 04:56:24,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:24,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752504278] [2024-11-14 04:56:24,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:24,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:56:24,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:24,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752504278] [2024-11-14 04:56:24,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752504278] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:24,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:56:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:56:24,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744973517] [2024-11-14 04:56:24,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:24,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:56:24,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:24,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:56:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:56:24,232 INFO L87 Difference]: Start difference. First operand 1663 states and 2334 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) [2024-11-14 04:56:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:24,686 INFO L93 Difference]: Finished difference Result 2162 states and 2906 transitions. [2024-11-14 04:56:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:56:24,687 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 [2024-11-14 04:56:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:24,699 INFO L225 Difference]: With dead ends: 2162 [2024-11-14 04:56:24,699 INFO L226 Difference]: Without dead ends: 1653 [2024-11-14 04:56:24,701 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 [2024-11-14 04:56:24,702 INFO L432 NwaCegarLoop]: 386 mSDtfsCounter, 389 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:24,702 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 453 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:56:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2024-11-14 04:56:25,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 1644. [2024-11-14 04:56:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 1321 states have (on average 1.3739591218773657) internal successors, (1815), 1328 states have internal predecessors, (1815), 211 states have call successors, (211), 112 states have call predecessors, (211), 110 states have return successors, (274), 205 states have call predecessors, (274), 208 states have call successors, (274) [2024-11-14 04:56:25,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2300 transitions. [2024-11-14 04:56:25,020 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2300 transitions. Word has length 108 [2024-11-14 04:56:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:25,020 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 2300 transitions. [2024-11-14 04:56:25,021 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) [2024-11-14 04:56:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2300 transitions. [2024-11-14 04:56:25,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 04:56:25,025 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:25,026 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] [2024-11-14 04:56:25,026 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:56:25,026 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:25,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 596619209, now seen corresponding path program 1 times [2024-11-14 04:56:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208447922] [2024-11-14 04:56:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:25,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-14 04:56:25,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208447922] [2024-11-14 04:56:25,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208447922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:25,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533882083] [2024-11-14 04:56:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:25,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:25,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:25,312 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:25,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:56:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:25,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-14 04:56:25,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:25,638 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-14 04:56:25,638 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:56:25,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533882083] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:25,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:56:25,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-11-14 04:56:25,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245164352] [2024-11-14 04:56:25,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:25,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:56:25,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:56:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-14 04:56:25,642 INFO L87 Difference]: Start difference. First operand 1644 states and 2300 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) [2024-11-14 04:56:26,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:26,384 INFO L93 Difference]: Finished difference Result 2164 states and 2894 transitions. [2024-11-14 04:56:26,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-14 04:56:26,385 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 [2024-11-14 04:56:26,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:26,401 INFO L225 Difference]: With dead ends: 2164 [2024-11-14 04:56:26,401 INFO L226 Difference]: Without dead ends: 1615 [2024-11-14 04:56:26,404 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 [2024-11-14 04:56:26,405 INFO L432 NwaCegarLoop]: 375 mSDtfsCounter, 44 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1817 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:26,405 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 1817 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:56:26,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2024-11-14 04:56:26,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1555. [2024-11-14 04:56:26,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1260 states have (on average 1.3849206349206349) internal successors, (1745), 1267 states have internal predecessors, (1745), 196 states have call successors, (196), 99 states have call predecessors, (196), 97 states have return successors, (259), 190 states have call predecessors, (259), 193 states have call successors, (259) [2024-11-14 04:56:26,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 2200 transitions. [2024-11-14 04:56:26,710 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 2200 transitions. Word has length 112 [2024-11-14 04:56:26,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:26,710 INFO L471 AbstractCegarLoop]: Abstraction has 1555 states and 2200 transitions. [2024-11-14 04:56:26,710 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) [2024-11-14 04:56:26,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 2200 transitions. [2024-11-14 04:56:26,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-11-14 04:56:26,713 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:26,714 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] [2024-11-14 04:56:26,741 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:56:26,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 04:56:26,915 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:26,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1855618343, now seen corresponding path program 1 times [2024-11-14 04:56:26,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:26,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34909558] [2024-11-14 04:56:26,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:26,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-14 04:56:27,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:27,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34909558] [2024-11-14 04:56:27,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34909558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:56:27,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:56:27,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:56:27,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617801013] [2024-11-14 04:56:27,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:56:27,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:56:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:56:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:56:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:56:27,138 INFO L87 Difference]: Start difference. First operand 1555 states and 2200 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) [2024-11-14 04:56:27,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:56:27,847 INFO L93 Difference]: Finished difference Result 2304 states and 3045 transitions. [2024-11-14 04:56:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:56:27,849 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 [2024-11-14 04:56:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:56:27,861 INFO L225 Difference]: With dead ends: 2304 [2024-11-14 04:56:27,861 INFO L226 Difference]: Without dead ends: 1847 [2024-11-14 04:56:27,864 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 [2024-11-14 04:56:27,865 INFO L432 NwaCegarLoop]: 380 mSDtfsCounter, 378 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1581 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:56:27,865 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1581 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:56:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2024-11-14 04:56:28,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1813. [2024-11-14 04:56:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1422 states have (on average 1.3537271448663855) internal successors, (1925), 1435 states have internal predecessors, (1925), 244 states have call successors, (244), 141 states have call predecessors, (244), 145 states have return successors, (319), 238 states have call predecessors, (319), 241 states have call successors, (319) [2024-11-14 04:56:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2488 transitions. [2024-11-14 04:56:28,248 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2488 transitions. Word has length 113 [2024-11-14 04:56:28,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:56:28,249 INFO L471 AbstractCegarLoop]: Abstraction has 1813 states and 2488 transitions. [2024-11-14 04:56:28,250 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) [2024-11-14 04:56:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2488 transitions. [2024-11-14 04:56:28,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 04:56:28,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:56:28,254 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] [2024-11-14 04:56:28,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-14 04:56:28,254 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:56:28,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:56:28,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1796178530, now seen corresponding path program 1 times [2024-11-14 04:56:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:56:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220405977] [2024-11-14 04:56:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:56:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-14 04:56:29,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:56:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220405977] [2024-11-14 04:56:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220405977] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:56:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926792425] [2024-11-14 04:56:29,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:56:29,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:56:29,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:56:29,997 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:56:30,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:56:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:56:30,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 04:56:30,216 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:56:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:56:31,399 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:56:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-14 04:56:33,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926792425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:56:33,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154012847] [2024-11-14 04:56:33,391 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2024-11-14 04:56:33,392 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:56:33,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:56:33,392 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:56:33,392 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:57:32,428 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 270 for LOIs [2024-11-14 04:57:32,809 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 13 for LOIs [2024-11-14 04:57:32,810 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 04:57:32,814 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 234 for LOIs [2024-11-14 04:57:34,907 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 235 for LOIs [2024-11-14 04:57:36,927 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 04:57:36,966 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 228 for LOIs [2024-11-14 04:57:37,326 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 239 for LOIs [2024-11-14 04:57:37,701 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:58:03,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '62294#(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 [2024-11-14 04:58:03,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:58:03,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:58:03,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 16] total 53 [2024-11-14 04:58:03,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205067177] [2024-11-14 04:58:03,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:58:03,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 04:58:03,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:03,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 04:58:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=851, Invalid=9451, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:58:03,884 INFO L87 Difference]: Start difference. First operand 1813 states and 2488 transitions. Second operand has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 04:58:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:28,546 INFO L93 Difference]: Finished difference Result 4639 states and 5937 transitions. [2024-11-14 04:58:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2024-11-14 04:58:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) Word has length 114 [2024-11-14 04:58:28,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:28,566 INFO L225 Difference]: With dead ends: 4639 [2024-11-14 04:58:28,566 INFO L226 Difference]: Without dead ends: 3921 [2024-11-14 04:58:28,594 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 298 SyntacticMatches, 6 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 55706 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=13027, Invalid=123503, Unknown=0, NotChecked=0, Total=136530 [2024-11-14 04:58:28,595 INFO L432 NwaCegarLoop]: 319 mSDtfsCounter, 6079 mSDsluCounter, 4650 mSDsCounter, 0 mSdLazyCounter, 8015 mSolverCounterSat, 2370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6079 SdHoareTripleChecker+Valid, 4969 SdHoareTripleChecker+Invalid, 10385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2370 IncrementalHoareTripleChecker+Valid, 8015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:28,596 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6079 Valid, 4969 Invalid, 10385 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2370 Valid, 8015 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-14 04:58:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3921 states. [2024-11-14 04:58:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3921 to 2088. [2024-11-14 04:58:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1605 states have (on average 1.329595015576324) internal successors, (2134), 1620 states have internal predecessors, (2134), 289 states have call successors, (289), 178 states have call predecessors, (289), 192 states have return successors, (376), 291 states have call predecessors, (376), 286 states have call successors, (376) [2024-11-14 04:58:29,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2799 transitions. [2024-11-14 04:58:29,233 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2799 transitions. Word has length 114 [2024-11-14 04:58:29,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:29,234 INFO L471 AbstractCegarLoop]: Abstraction has 2088 states and 2799 transitions. [2024-11-14 04:58:29,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 36 states have (on average 5.444444444444445) internal successors, (196), 39 states have internal predecessors, (196), 22 states have call successors, (44), 18 states have call predecessors, (44), 23 states have return successors, (46), 21 states have call predecessors, (46), 22 states have call successors, (46) [2024-11-14 04:58:29,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2799 transitions. [2024-11-14 04:58:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-14 04:58:29,242 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:29,242 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] [2024-11-14 04:58:29,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:58:29,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:58:29,443 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:29,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:29,444 INFO L85 PathProgramCache]: Analyzing trace with hash 627258326, now seen corresponding path program 1 times [2024-11-14 04:58:29,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:29,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880679330] [2024-11-14 04:58:29,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:29,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:58:29,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:29,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880679330] [2024-11-14 04:58:29,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880679330] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:29,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191775450] [2024-11-14 04:58:29,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:29,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:29,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:29,842 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:29,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:58:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:30,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:58:30,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:58:30,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 04:58:30,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191775450] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:30,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:58:30,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2024-11-14 04:58:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324056419] [2024-11-14 04:58:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:58:30,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 04:58:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:58:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 04:58:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:58:30,409 INFO L87 Difference]: Start difference. First operand 2088 states and 2799 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) [2024-11-14 04:58:31,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:58:31,796 INFO L93 Difference]: Finished difference Result 3412 states and 4347 transitions. [2024-11-14 04:58:31,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 04:58:31,797 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 [2024-11-14 04:58:31,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:58:31,811 INFO L225 Difference]: With dead ends: 3412 [2024-11-14 04:58:31,811 INFO L226 Difference]: Without dead ends: 2421 [2024-11-14 04:58:31,815 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 [2024-11-14 04:58:31,816 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 588 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:58:31,816 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 638 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:58:31,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2024-11-14 04:58:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2168. [2024-11-14 04:58:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 1650 states have (on average 1.3242424242424242) internal successors, (2185), 1668 states have internal predecessors, (2185), 308 states have call successors, (308), 187 states have call predecessors, (308), 208 states have return successors, (416), 314 states have call predecessors, (416), 305 states have call successors, (416) [2024-11-14 04:58:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2909 transitions. [2024-11-14 04:58:32,348 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2909 transitions. Word has length 115 [2024-11-14 04:58:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:58:32,348 INFO L471 AbstractCegarLoop]: Abstraction has 2168 states and 2909 transitions. [2024-11-14 04:58:32,348 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) [2024-11-14 04:58:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2909 transitions. [2024-11-14 04:58:32,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 04:58:32,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:58:32,352 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] [2024-11-14 04:58:32,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:58:32,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:58:32,553 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:58:32,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:58:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash -917569095, now seen corresponding path program 1 times [2024-11-14 04:58:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:58:32,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150833895] [2024-11-14 04:58:32,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:32,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:58:32,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:33,477 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-11-14 04:58:33,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:58:33,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150833895] [2024-11-14 04:58:33,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150833895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:58:33,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636139132] [2024-11-14 04:58:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:58:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:58:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:58:33,483 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:58:33,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:58:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:58:33,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 04:58:33,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:58:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 04:58:34,873 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:58:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-14 04:58:36,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636139132] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:58:36,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [210355091] [2024-11-14 04:58:36,397 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2024-11-14 04:58:36,397 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:58:36,397 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:58:36,397 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:58:36,397 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:59:03,755 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 271 for LOIs [2024-11-14 04:59:04,143 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 77 for LOIs [2024-11-14 04:59:04,173 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 7 for LOIs [2024-11-14 04:59:04,176 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 235 for LOIs [2024-11-14 04:59:06,174 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 236 for LOIs [2024-11-14 04:59:08,076 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 21 for LOIs [2024-11-14 04:59:08,100 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 229 for LOIs [2024-11-14 04:59:08,431 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 240 for LOIs [2024-11-14 04:59:08,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:59:35,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '81860#(and (= ~q_req_up~0 1) (= ~q_free~0 1) (exists ((v_~q_free~0_102 Int) (v_~q_req_up~0_98 Int)) (and (or (exists ((v_~p_dw_st~0_140 Int) (v_~p_dw_pc~0_48 Int)) (and (or (and (= v_~p_dw_st~0_140 1) (= v_~p_dw_pc~0_48 0)) (and (<= ~q_buf_0~0 2147483647) (= v_~p_dw_st~0_140 1) (<= 0 (+ ~q_buf_0~0 2147483648)) (= v_~q_req_up~0_98 1))) (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_48 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_48 0))))) (= ~p_dw_st~0 0)) (or (and (= v_~q_free~0_102 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0)) (and (<= v_~q_free~0_102 1) (<= 0 ~p_dw_pc~0) (= ~p_dw_st~0 0))))) (= ~c_dr_pc~0 1) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~c_last_read~0 ~q_buf_0~0) (= ~c_last_read~0 ~p_last_write~0) (exists ((|v_ULTIMATE.start_eval1_~tmp___0~2#1_44| Int)) (and (<= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483647) (<= 0 (+ |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 2147483648)) (not (= |v_ULTIMATE.start_eval1_~tmp___0~2#1_44| 0)))) (= ~c_dr_st~0 1))' at error location [2024-11-14 04:59:35,069 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:59:35,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:59:35,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 18] total 49 [2024-11-14 04:59:35,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806912473] [2024-11-14 04:59:35,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:59:35,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 04:59:35,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:35,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 04:59:35,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=9379, Unknown=0, NotChecked=0, Total=10302 [2024-11-14 04:59:35,075 INFO L87 Difference]: Start difference. First operand 2168 states and 2909 transitions. Second operand has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 04:59:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:46,122 INFO L93 Difference]: Finished difference Result 4373 states and 5488 transitions. [2024-11-14 04:59:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-14 04:59:46,123 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) Word has length 124 [2024-11-14 04:59:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:46,142 INFO L225 Difference]: With dead ends: 4373 [2024-11-14 04:59:46,143 INFO L226 Difference]: Without dead ends: 3302 [2024-11-14 04:59:46,151 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 15911 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=4266, Invalid=36740, Unknown=0, NotChecked=0, Total=41006 [2024-11-14 04:59:46,152 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 4463 mSDsluCounter, 2813 mSDsCounter, 0 mSdLazyCounter, 6237 mSolverCounterSat, 1924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4463 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 8161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1924 IncrementalHoareTripleChecker+Valid, 6237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:46,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4463 Valid, 3101 Invalid, 8161 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1924 Valid, 6237 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-14 04:59:46,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2024-11-14 04:59:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 1984. [2024-11-14 04:59:46,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1538 states have (on average 1.3374512353706112) internal successors, (2057), 1555 states have internal predecessors, (2057), 268 states have call successors, (268), 155 states have call predecessors, (268), 176 states have return successors, (366), 275 states have call predecessors, (366), 265 states have call successors, (366) [2024-11-14 04:59:46,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2691 transitions. [2024-11-14 04:59:46,777 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2691 transitions. Word has length 124 [2024-11-14 04:59:46,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:46,779 INFO L471 AbstractCegarLoop]: Abstraction has 1984 states and 2691 transitions. [2024-11-14 04:59:46,779 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 6.085714285714285) internal successors, (213), 39 states have internal predecessors, (213), 26 states have call successors, (49), 17 states have call predecessors, (49), 21 states have return successors, (51), 24 states have call predecessors, (51), 26 states have call successors, (51) [2024-11-14 04:59:46,780 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2691 transitions. [2024-11-14 04:59:46,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-14 04:59:46,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:46,784 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] [2024-11-14 04:59:46,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:59:46,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:59:46,988 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:46,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:46,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2013638711, now seen corresponding path program 1 times [2024-11-14 04:59:46,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:46,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007856128] [2024-11-14 04:59:46,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:46,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:59:47,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007856128] [2024-11-14 04:59:47,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007856128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:47,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248488674] [2024-11-14 04:59:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:47,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:47,231 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:47,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:59:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:47,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:59:47,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-14 04:59:47,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:59:47,846 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-14 04:59:47,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248488674] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:47,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 04:59:47,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2024-11-14 04:59:47,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889029993] [2024-11-14 04:59:47,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:47,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:59:47,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:47,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:59:47,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-14 04:59:47,848 INFO L87 Difference]: Start difference. First operand 1984 states and 2691 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) [2024-11-14 04:59:49,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:49,302 INFO L93 Difference]: Finished difference Result 2639 states and 3432 transitions. [2024-11-14 04:59:49,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:59:49,303 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 [2024-11-14 04:59:49,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:49,329 INFO L225 Difference]: With dead ends: 2639 [2024-11-14 04:59:49,329 INFO L226 Difference]: Without dead ends: 1752 [2024-11-14 04:59:49,333 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:59:49,333 INFO L432 NwaCegarLoop]: 277 mSDtfsCounter, 893 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:49,334 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [894 Valid, 617 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 04:59:49,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2024-11-14 04:59:49,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1715. [2024-11-14 04:59:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1715 states, 1339 states have (on average 1.3532486930545182) internal successors, (1812), 1356 states have internal predecessors, (1812), 232 states have call successors, (232), 125 states have call predecessors, (232), 142 states have return successors, (325), 235 states have call predecessors, (325), 229 states have call successors, (325) [2024-11-14 04:59:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1715 states to 1715 states and 2369 transitions. [2024-11-14 04:59:49,809 INFO L78 Accepts]: Start accepts. Automaton has 1715 states and 2369 transitions. Word has length 125 [2024-11-14 04:59:49,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:49,810 INFO L471 AbstractCegarLoop]: Abstraction has 1715 states and 2369 transitions. [2024-11-14 04:59:49,810 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) [2024-11-14 04:59:49,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1715 states and 2369 transitions. [2024-11-14 04:59:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 04:59:49,815 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:49,815 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:59:49,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:59:50,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:59:50,016 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:50,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:50,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1184536912, now seen corresponding path program 1 times [2024-11-14 04:59:50,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:50,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981912953] [2024-11-14 04:59:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:50,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:50,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:59:50,158 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981912953] [2024-11-14 04:59:50,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981912953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:50,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868491390] [2024-11-14 04:59:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:50,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:50,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:50,161 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:50,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:59:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:50,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:59:50,495 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 04:59:50,544 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:59:50,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868491390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:50,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:50,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:59:50,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847185762] [2024-11-14 04:59:50,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:50,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:50,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:50,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:50,546 INFO L87 Difference]: Start difference. First operand 1715 states and 2369 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2024-11-14 04:59:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:51,236 INFO L93 Difference]: Finished difference Result 3699 states and 5618 transitions. [2024-11-14 04:59:51,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:51,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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 145 [2024-11-14 04:59:51,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:51,255 INFO L225 Difference]: With dead ends: 3699 [2024-11-14 04:59:51,255 INFO L226 Difference]: Without dead ends: 2699 [2024-11-14 04:59:51,263 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:51,264 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 385 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:51,264 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:51,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2024-11-14 04:59:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2690. [2024-11-14 04:59:51,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2177 states have (on average 1.4042259990813046) internal successors, (3057), 2197 states have internal predecessors, (3057), 339 states have call successors, (339), 155 states have call predecessors, (339), 172 states have return successors, (494), 339 states have call predecessors, (494), 336 states have call successors, (494) [2024-11-14 04:59:51,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3890 transitions. [2024-11-14 04:59:51,948 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3890 transitions. Word has length 145 [2024-11-14 04:59:51,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:51,948 INFO L471 AbstractCegarLoop]: Abstraction has 2690 states and 3890 transitions. [2024-11-14 04:59:51,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 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) [2024-11-14 04:59:51,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3890 transitions. [2024-11-14 04:59:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 04:59:51,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:51,954 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:59:51,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:52,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:52,158 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:52,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash -217278382, now seen corresponding path program 1 times [2024-11-14 04:59:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:52,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916544532] [2024-11-14 04:59:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:52,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:59:52,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:52,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916544532] [2024-11-14 04:59:52,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916544532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:52,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452738390] [2024-11-14 04:59:52,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:52,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:52,323 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:52,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:59:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:52,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 995 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:59:52,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-14 04:59:52,709 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:59:52,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452738390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:52,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:52,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:59:52,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490131425] [2024-11-14 04:59:52,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:52,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:52,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:52,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:52,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:52,712 INFO L87 Difference]: Start difference. First operand 2690 states and 3890 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2024-11-14 04:59:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:53,484 INFO L93 Difference]: Finished difference Result 6609 states and 10282 transitions. [2024-11-14 04:59:53,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:53,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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 145 [2024-11-14 04:59:53,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:53,514 INFO L225 Difference]: With dead ends: 6609 [2024-11-14 04:59:53,514 INFO L226 Difference]: Without dead ends: 4634 [2024-11-14 04:59:53,526 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:53,527 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 376 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:53,527 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4634 states. [2024-11-14 04:59:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4634 to 4620. [2024-11-14 04:59:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3838 states have (on average 1.4374674309536217) internal successors, (5517), 3864 states have internal predecessors, (5517), 548 states have call successors, (548), 215 states have call predecessors, (548), 232 states have return successors, (823), 542 states have call predecessors, (823), 545 states have call successors, (823) [2024-11-14 04:59:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6888 transitions. [2024-11-14 04:59:54,119 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6888 transitions. Word has length 145 [2024-11-14 04:59:54,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:54,119 INFO L471 AbstractCegarLoop]: Abstraction has 4620 states and 6888 transitions. [2024-11-14 04:59:54,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 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) [2024-11-14 04:59:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6888 transitions. [2024-11-14 04:59:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 04:59:54,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:54,130 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:59:54,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 04:59:54,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:54,331 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:54,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2029433072, now seen corresponding path program 1 times [2024-11-14 04:59:54,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:54,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923461653] [2024-11-14 04:59:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:54,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:54,496 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:59:54,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923461653] [2024-11-14 04:59:54,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923461653] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:54,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017988955] [2024-11-14 04:59:54,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:54,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:54,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:54,499 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:54,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:59:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:54,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:59:54,797 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:59:54,838 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:59:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017988955] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:54,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:54,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:59:54,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831328170] [2024-11-14 04:59:54,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:54,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:54,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:54,840 INFO L87 Difference]: Start difference. First operand 4620 states and 6888 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2024-11-14 04:59:55,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:55,946 INFO L93 Difference]: Finished difference Result 12369 states and 19469 transitions. [2024-11-14 04:59:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:55,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 145 [2024-11-14 04:59:55,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:55,992 INFO L225 Difference]: With dead ends: 12369 [2024-11-14 04:59:55,992 INFO L226 Difference]: Without dead ends: 8464 [2024-11-14 04:59:56,015 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:56,016 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 382 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:56,016 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8464 states. [2024-11-14 04:59:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8464 to 8440. [2024-11-14 04:59:57,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8440 states, 7130 states have (on average 1.4553997194950912) internal successors, (10377), 7168 states have internal predecessors, (10377), 956 states have call successors, (956), 335 states have call predecessors, (956), 352 states have return successors, (1463), 938 states have call predecessors, (1463), 953 states have call successors, (1463) [2024-11-14 04:59:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8440 states to 8440 states and 12796 transitions. [2024-11-14 04:59:57,058 INFO L78 Accepts]: Start accepts. Automaton has 8440 states and 12796 transitions. Word has length 145 [2024-11-14 04:59:57,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:59:57,058 INFO L471 AbstractCegarLoop]: Abstraction has 8440 states and 12796 transitions. [2024-11-14 04:59:57,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2024-11-14 04:59:57,059 INFO L276 IsEmpty]: Start isEmpty. Operand 8440 states and 12796 transitions. [2024-11-14 04:59:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 04:59:57,075 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:59:57,075 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 04:59:57,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 04:59:57,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:57,276 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:59:57,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:59:57,277 INFO L85 PathProgramCache]: Analyzing trace with hash 520453966, now seen corresponding path program 1 times [2024-11-14 04:59:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:59:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112933014] [2024-11-14 04:59:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:59:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 04:59:57,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:59:57,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112933014] [2024-11-14 04:59:57,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112933014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:59:57,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304727963] [2024-11-14 04:59:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:59:57,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:59:57,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:59:57,452 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:59:57,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:59:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:59:57,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:59:57,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:59:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-14 04:59:57,863 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:59:57,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304727963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:59:57,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:59:57,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:59:57,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936829286] [2024-11-14 04:59:57,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:59:57,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:59:57,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:59:57,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:59:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:57,866 INFO L87 Difference]: Start difference. First operand 8440 states and 12796 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2024-11-14 04:59:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:59:59,534 INFO L93 Difference]: Finished difference Result 23769 states and 37561 transitions. [2024-11-14 04:59:59,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:59:59,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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 145 [2024-11-14 04:59:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:59:59,613 INFO L225 Difference]: With dead ends: 23769 [2024-11-14 04:59:59,613 INFO L226 Difference]: Without dead ends: 16044 [2024-11-14 04:59:59,646 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:59:59,648 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 355 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:59:59,649 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:59:59,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16044 states. [2024-11-14 05:00:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16044 to 16000. [2024-11-14 05:00:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16000 states, 13654 states have (on average 1.4630877398564524) internal successors, (19977), 13716 states have internal predecessors, (19977), 1752 states have call successors, (1752), 575 states have call predecessors, (1752), 592 states have return successors, (2707), 1710 states have call predecessors, (2707), 1749 states have call successors, (2707) [2024-11-14 05:00:01,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16000 states to 16000 states and 24436 transitions. [2024-11-14 05:00:01,565 INFO L78 Accepts]: Start accepts. Automaton has 16000 states and 24436 transitions. Word has length 145 [2024-11-14 05:00:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:01,566 INFO L471 AbstractCegarLoop]: Abstraction has 16000 states and 24436 transitions. [2024-11-14 05:00:01,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 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) [2024-11-14 05:00:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 16000 states and 24436 transitions. [2024-11-14 05:00:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:00:01,588 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:01,589 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 05:00:01,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-14 05:00:01,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:00:01,793 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:01,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1444826576, now seen corresponding path program 1 times [2024-11-14 05:00:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:01,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563623007] [2024-11-14 05:00:01,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:01,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:00:01,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:01,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563623007] [2024-11-14 05:00:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563623007] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:01,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519831914] [2024-11-14 05:00:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:01,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:01,972 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:01,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:00:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:02,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 977 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:00:02,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 05:00:02,381 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:00:02,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519831914] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:02,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:00:02,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:00:02,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750318291] [2024-11-14 05:00:02,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:02,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:00:02,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:00:02,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:00:02,383 INFO L87 Difference]: Start difference. First operand 16000 states and 24436 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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) [2024-11-14 05:00:05,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:05,055 INFO L93 Difference]: Finished difference Result 46329 states and 73181 transitions. [2024-11-14 05:00:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:00:05,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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 145 [2024-11-14 05:00:05,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:05,221 INFO L225 Difference]: With dead ends: 46329 [2024-11-14 05:00:05,221 INFO L226 Difference]: Without dead ends: 31044 [2024-11-14 05:00:05,287 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:00:05,288 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 364 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:05,288 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:00:05,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31044 states. [2024-11-14 05:00:08,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31044 to 30960. [2024-11-14 05:00:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30960 states, 26582 states have (on average 1.4647882025430743) internal successors, (38937), 26692 states have internal predecessors, (38937), 3304 states have call successors, (3304), 1055 states have call predecessors, (3304), 1072 states have return successors, (5123), 3214 states have call predecessors, (5123), 3301 states have call successors, (5123) [2024-11-14 05:00:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30960 states to 30960 states and 47364 transitions. [2024-11-14 05:00:08,831 INFO L78 Accepts]: Start accepts. Automaton has 30960 states and 47364 transitions. Word has length 145 [2024-11-14 05:00:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:08,832 INFO L471 AbstractCegarLoop]: Abstraction has 30960 states and 47364 transitions. [2024-11-14 05:00:08,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 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) [2024-11-14 05:00:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 30960 states and 47364 transitions. [2024-11-14 05:00:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:00:08,882 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:08,883 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 05:00:08,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 05:00:09,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-14 05:00:09,084 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:09,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:09,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1067929202, now seen corresponding path program 1 times [2024-11-14 05:00:09,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:09,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881078480] [2024-11-14 05:00:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:09,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:00:09,290 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:09,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881078480] [2024-11-14 05:00:09,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881078480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:09,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600441959] [2024-11-14 05:00:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:09,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:09,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:09,294 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:09,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:00:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:09,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 971 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:00:09,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:09,675 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-14 05:00:09,676 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:00:09,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600441959] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:09,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:00:09,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:00:09,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234041096] [2024-11-14 05:00:09,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:09,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:00:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:00:09,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:00:09,678 INFO L87 Difference]: Start difference. First operand 30960 states and 47364 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2024-11-14 05:00:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:00:16,049 INFO L93 Difference]: Finished difference Result 90969 states and 143293 transitions. [2024-11-14 05:00:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 05:00:16,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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 145 [2024-11-14 05:00:16,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:00:16,369 INFO L225 Difference]: With dead ends: 90969 [2024-11-14 05:00:16,369 INFO L226 Difference]: Without dead ends: 60724 [2024-11-14 05:00:16,510 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:00:16,511 INFO L432 NwaCegarLoop]: 345 mSDtfsCounter, 370 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:00:16,511 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 608 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:00:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60724 states. [2024-11-14 05:00:23,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60724 to 60560. [2024-11-14 05:00:23,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60560 states, 52198 states have (on average 1.4632169814935438) internal successors, (76377), 52404 states have internal predecessors, (76377), 6328 states have call successors, (6328), 2015 states have call predecessors, (6328), 2032 states have return successors, (9811), 6142 states have call predecessors, (9811), 6325 states have call successors, (9811) [2024-11-14 05:00:23,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60560 states to 60560 states and 92516 transitions. [2024-11-14 05:00:23,366 INFO L78 Accepts]: Start accepts. Automaton has 60560 states and 92516 transitions. Word has length 145 [2024-11-14 05:00:23,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:00:23,366 INFO L471 AbstractCegarLoop]: Abstraction has 60560 states and 92516 transitions. [2024-11-14 05:00:23,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 2 states have internal predecessors, (105), 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) [2024-11-14 05:00:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 60560 states and 92516 transitions. [2024-11-14 05:00:23,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-14 05:00:23,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:00:23,442 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2024-11-14 05:00:23,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:00:23,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-14 05:00:23,642 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:00:23,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:00:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1658638028, now seen corresponding path program 1 times [2024-11-14 05:00:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:00:23,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109911760] [2024-11-14 05:00:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:00:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 05:00:23,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:00:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109911760] [2024-11-14 05:00:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109911760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:00:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628432058] [2024-11-14 05:00:23,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:00:23,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:00:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:00:23,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:00:23,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd289d0f-e0a8-4d1a-a594-40d2b6d627ce/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:00:24,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:00:24,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 05:00:24,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:00:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 05:00:24,255 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 05:00:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628432058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:00:24,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 05:00:24,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 05:00:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744009705] [2024-11-14 05:00:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:00:24,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 05:00:24,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:00:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 05:00:24,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:00:24,258 INFO L87 Difference]: Start difference. First operand 60560 states and 92516 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 2 states have internal predecessors, (114), 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)