./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.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_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/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_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/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_8142adfc-1d18-4c8c-80ed-e864bcb73604/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 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:29:13,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:29:13,520 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:29:13,529 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:29:13,530 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:29:13,576 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:29:13,578 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:29:13,579 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:29:13,579 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:29:13,580 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:29:13,580 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:29:13,581 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:29:13,581 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:29:13,582 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:29:13,582 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:29:13,582 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:29:13,583 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:29:13,583 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:29:13,583 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:29:13,583 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:29:13,583 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:29:13,583 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:29:13,584 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:29:13,584 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:29:13,585 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:29:13,585 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:29:13,585 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:29:13,585 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:29:13,585 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:29:13,586 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:29:13,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:29:13,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:29:13,588 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:29:13,588 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:29:13,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:29:13,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:29:13,589 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:29:13,589 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_8142adfc-1d18-4c8c-80ed-e864bcb73604/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 -> 54640fbb6743a38bf41f3a8b2318fcad885a58c92146d7845af619d355e32c56 [2024-11-14 04:29:14,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:29:14,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:29:14,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:29:14,039 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:29:14,039 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:29:14,041 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c Unable to find full path for "g++" [2024-11-14 04:29:16,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:29:16,765 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:29:16,765 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c [2024-11-14 04:29:16,791 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/data/d436231ec/ce36fcfb0c674c6f8a66f16ba5bbb69e/FLAGd37103e19 [2024-11-14 04:29:16,817 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/data/d436231ec/ce36fcfb0c674c6f8a66f16ba5bbb69e [2024-11-14 04:29:16,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:29:16,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:29:16,828 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:29:16,828 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:29:16,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:29:16,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:29:16" (1/1) ... [2024-11-14 04:29:16,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30f39fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:16, skipping insertion in model container [2024-11-14 04:29:16,840 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:29:16" (1/1) ... [2024-11-14 04:29:16,913 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:29:17,107 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_8142adfc-1d18-4c8c-80ed-e864bcb73604/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2024-11-14 04:29:17,232 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_8142adfc-1d18-4c8c-80ed-e864bcb73604/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2024-11-14 04:29:17,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:29:17,417 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:29:17,428 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_8142adfc-1d18-4c8c-80ed-e864bcb73604/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[911,924] [2024-11-14 04:29:17,455 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_8142adfc-1d18-4c8c-80ed-e864bcb73604/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.12.cil-1.c[8416,8429] [2024-11-14 04:29:17,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:29:17,613 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:29:17,614 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17 WrapperNode [2024-11-14 04:29:17,614 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:29:17,615 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:29:17,615 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:29:17,616 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:29:17,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,644 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,711 INFO L138 Inliner]: procedures = 79, calls = 98, calls flagged for inlining = 47, calls inlined = 47, statements flattened = 1093 [2024-11-14 04:29:17,711 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:29:17,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:29:17,712 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:29:17,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:29:17,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,728 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,746 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,765 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,773 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,780 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:29:17,781 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:29:17,781 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:29:17,782 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:29:17,783 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (1/1) ... [2024-11-14 04:29:17,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:29:17,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:17,835 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:29:17,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:29:17,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:29:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2024-11-14 04:29:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2024-11-14 04:29:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2024-11-14 04:29:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2024-11-14 04:29:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2024-11-14 04:29:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2024-11-14 04:29:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2024-11-14 04:29:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2024-11-14 04:29:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2024-11-14 04:29:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2024-11-14 04:29:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2024-11-14 04:29:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2024-11-14 04:29:17,886 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2024-11-14 04:29:17,886 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2024-11-14 04:29:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2024-11-14 04:29:17,887 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2024-11-14 04:29:17,887 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2024-11-14 04:29:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2024-11-14 04:29:17,888 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2024-11-14 04:29:17,888 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2024-11-14 04:29:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2024-11-14 04:29:17,889 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2024-11-14 04:29:17,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:29:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2024-11-14 04:29:17,890 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2024-11-14 04:29:17,890 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2024-11-14 04:29:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2024-11-14 04:29:17,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:29:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:29:17,891 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2024-11-14 04:29:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2024-11-14 04:29:17,891 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2024-11-14 04:29:17,891 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2024-11-14 04:29:18,146 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:29:18,149 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:29:19,501 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2024-11-14 04:29:19,502 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2024-11-14 04:29:19,933 INFO L? ?]: Removed 134 outVars from TransFormulas that were not future-live. [2024-11-14 04:29:19,933 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:29:20,903 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:29:20,903 INFO L316 CfgBuilder]: Removed 19 assume(true) statements. [2024-11-14 04:29:20,903 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:29:20 BoogieIcfgContainer [2024-11-14 04:29:20,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:29:20,912 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:29:20,912 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:29:20,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:29:20,936 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:29:16" (1/3) ... [2024-11-14 04:29:20,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613f3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:29:20, skipping insertion in model container [2024-11-14 04:29:20,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:29:17" (2/3) ... [2024-11-14 04:29:20,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@613f3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:29:20, skipping insertion in model container [2024-11-14 04:29:20,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:29:20" (3/3) ... [2024-11-14 04:29:20,943 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.12.cil-1.c [2024-11-14 04:29:20,969 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:29:20,972 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pc_sfifo_3.cil+token_ring.12.cil-1.c that has 16 procedures, 286 locations, 1 initial locations, 19 loop locations, and 2 error locations. [2024-11-14 04:29:21,078 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:29:21,099 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;@7a53384c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:29:21,099 INFO L334 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-11-14 04:29:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 286 states, 224 states have (on average 1.5178571428571428) internal successors, (340), 232 states have internal predecessors, (340), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2024-11-14 04:29:21,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-14 04:29:21,122 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:21,124 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:21,125 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:21,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:21,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1960841571, now seen corresponding path program 1 times [2024-11-14 04:29:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018409796] [2024-11-14 04:29:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:21,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:21,680 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 04:29:21,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018409796] [2024-11-14 04:29:21,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018409796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:21,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:21,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:29:21,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753469434] [2024-11-14 04:29:21,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:21,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:29:21,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:21,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:29:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:29:21,722 INFO L87 Difference]: Start difference. First operand has 286 states, 224 states have (on average 1.5178571428571428) internal successors, (340), 232 states have internal predecessors, (340), 44 states have call successors, (44), 15 states have call predecessors, (44), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:29:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:22,636 INFO L93 Difference]: Finished difference Result 694 states and 1034 transitions. [2024-11-14 04:29:22,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:29:22,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2024-11-14 04:29:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:22,664 INFO L225 Difference]: With dead ends: 694 [2024-11-14 04:29:22,664 INFO L226 Difference]: Without dead ends: 409 [2024-11-14 04:29:22,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:29:22,675 INFO L432 NwaCegarLoop]: 405 mSDtfsCounter, 477 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:22,678 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 721 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 04:29:22,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2024-11-14 04:29:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 398. [2024-11-14 04:29:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 305 states have (on average 1.4426229508196722) internal successors, (440), 310 states have internal predecessors, (440), 64 states have call successors, (64), 29 states have call predecessors, (64), 27 states have return successors, (63), 60 states have call predecessors, (63), 60 states have call successors, (63) [2024-11-14 04:29:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 567 transitions. [2024-11-14 04:29:22,804 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 567 transitions. Word has length 44 [2024-11-14 04:29:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:22,804 INFO L471 AbstractCegarLoop]: Abstraction has 398 states and 567 transitions. [2024-11-14 04:29:22,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:29:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 567 transitions. [2024-11-14 04:29:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-14 04:29:22,808 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:22,808 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 04:29:22,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:29:22,810 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:22,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:22,811 INFO L85 PathProgramCache]: Analyzing trace with hash -529986281, now seen corresponding path program 1 times [2024-11-14 04:29:22,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:22,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19029882] [2024-11-14 04:29:22,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:22,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:23,129 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 04:29:23,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:23,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19029882] [2024-11-14 04:29:23,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19029882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:23,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:23,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:29:23,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861737695] [2024-11-14 04:29:23,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:23,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:29:23,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:29:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:23,132 INFO L87 Difference]: Start difference. First operand 398 states and 567 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-14 04:29:24,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:24,660 INFO L93 Difference]: Finished difference Result 935 states and 1290 transitions. [2024-11-14 04:29:24,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:29:24,661 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 04:29:24,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:24,666 INFO L225 Difference]: With dead ends: 935 [2024-11-14 04:29:24,666 INFO L226 Difference]: Without dead ends: 469 [2024-11-14 04:29:24,669 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-14 04:29:24,670 INFO L432 NwaCegarLoop]: 449 mSDtfsCounter, 1023 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:24,671 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 1170 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 04:29:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2024-11-14 04:29:24,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 384. [2024-11-14 04:29:24,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 291 states have (on average 1.3986254295532645) internal successors, (407), 296 states have internal predecessors, (407), 64 states have call successors, (64), 29 states have call predecessors, (64), 27 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2024-11-14 04:29:24,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 531 transitions. [2024-11-14 04:29:24,723 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 531 transitions. Word has length 45 [2024-11-14 04:29:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:24,723 INFO L471 AbstractCegarLoop]: Abstraction has 384 states and 531 transitions. [2024-11-14 04:29:24,723 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 04:29:24,724 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 531 transitions. [2024-11-14 04:29:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:29:24,725 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:24,725 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 04:29:24,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:29:24,726 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:24,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:24,726 INFO L85 PathProgramCache]: Analyzing trace with hash 903854467, now seen corresponding path program 1 times [2024-11-14 04:29:24,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:24,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670822433] [2024-11-14 04:29:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:24,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:25,236 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 04:29:25,238 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:25,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670822433] [2024-11-14 04:29:25,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670822433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:25,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:25,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-14 04:29:25,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293376616] [2024-11-14 04:29:25,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:25,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:29:25,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:25,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:29:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-14 04:29:25,242 INFO L87 Difference]: Start difference. First operand 384 states and 531 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 04:29:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:26,738 INFO L93 Difference]: Finished difference Result 686 states and 899 transitions. [2024-11-14 04:29:26,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:29:26,739 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 04:29:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:26,745 INFO L225 Difference]: With dead ends: 686 [2024-11-14 04:29:26,746 INFO L226 Difference]: Without dead ends: 512 [2024-11-14 04:29:26,750 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 04:29:26,751 INFO L432 NwaCegarLoop]: 229 mSDtfsCounter, 572 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:26,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [605 Valid, 1051 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:29:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2024-11-14 04:29:26,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 486. [2024-11-14 04:29:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 359 states have (on average 1.3621169916434541) internal successors, (489), 364 states have internal predecessors, (489), 84 states have call successors, (84), 43 states have call predecessors, (84), 41 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2024-11-14 04:29:26,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 653 transitions. [2024-11-14 04:29:26,842 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 653 transitions. Word has length 46 [2024-11-14 04:29:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:26,847 INFO L471 AbstractCegarLoop]: Abstraction has 486 states and 653 transitions. [2024-11-14 04:29:26,847 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 04:29:26,847 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 653 transitions. [2024-11-14 04:29:26,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:29:26,849 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:26,849 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 04:29:26,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 04:29:26,850 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:26,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:26,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2112546378, now seen corresponding path program 1 times [2024-11-14 04:29:26,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:26,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521381550] [2024-11-14 04:29:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:26,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:26,951 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 04:29:26,951 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:26,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521381550] [2024-11-14 04:29:26,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521381550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:26,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:26,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:29:26,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084734572] [2024-11-14 04:29:26,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:26,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:26,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:26,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:29:26,953 INFO L87 Difference]: Start difference. First operand 486 states and 653 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 04:29:27,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:27,165 INFO L93 Difference]: Finished difference Result 751 states and 989 transitions. [2024-11-14 04:29:27,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:27,165 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 04:29:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:27,168 INFO L225 Difference]: With dead ends: 751 [2024-11-14 04:29:27,168 INFO L226 Difference]: Without dead ends: 205 [2024-11-14 04:29:27,170 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 04:29:27,175 INFO L432 NwaCegarLoop]: 328 mSDtfsCounter, 378 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:27,175 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 328 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:29:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-14 04:29:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2024-11-14 04:29:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 170 states have (on average 1.4941176470588236) internal successors, (254), 172 states have internal predecessors, (254), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-14 04:29:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 308 transitions. [2024-11-14 04:29:27,202 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 308 transitions. Word has length 47 [2024-11-14 04:29:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:27,203 INFO L471 AbstractCegarLoop]: Abstraction has 205 states and 308 transitions. [2024-11-14 04:29:27,203 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 04:29:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 308 transitions. [2024-11-14 04:29:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-11-14 04:29:27,209 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:27,209 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:27,209 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-14 04:29:27,209 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:27,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -615150050, now seen corresponding path program 1 times [2024-11-14 04:29:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596710750] [2024-11-14 04:29:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:27,555 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 04:29:27,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:27,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596710750] [2024-11-14 04:29:27,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596710750] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:27,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:27,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 04:29:27,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48663710] [2024-11-14 04:29:27,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:27,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 04:29:27,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:27,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 04:29:27,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 04:29:27,559 INFO L87 Difference]: Start difference. First operand 205 states and 308 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:29:28,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:28,856 INFO L93 Difference]: Finished difference Result 1158 states and 1848 transitions. [2024-11-14 04:29:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 04:29:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 68 [2024-11-14 04:29:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:28,872 INFO L225 Difference]: With dead ends: 1158 [2024-11-14 04:29:28,872 INFO L226 Difference]: Without dead ends: 959 [2024-11-14 04:29:28,877 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 04:29:28,878 INFO L432 NwaCegarLoop]: 485 mSDtfsCounter, 1401 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:28,878 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 1343 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:29:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2024-11-14 04:29:29,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 946. [2024-11-14 04:29:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 802 states have (on average 1.4887780548628429) internal successors, (1194), 807 states have internal predecessors, (1194), 113 states have call successors, (113), 31 states have call predecessors, (113), 30 states have return successors, (173), 108 states have call predecessors, (173), 111 states have call successors, (173) [2024-11-14 04:29:29,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1480 transitions. [2024-11-14 04:29:29,038 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1480 transitions. Word has length 68 [2024-11-14 04:29:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:29,039 INFO L471 AbstractCegarLoop]: Abstraction has 946 states and 1480 transitions. [2024-11-14 04:29:29,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-14 04:29:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1480 transitions. [2024-11-14 04:29:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:29,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:29,047 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:29,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-14 04:29:29,048 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:29,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -356670810, now seen corresponding path program 1 times [2024-11-14 04:29:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918709724] [2024-11-14 04:29:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:29,373 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 04:29:29,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:29,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918709724] [2024-11-14 04:29:29,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918709724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:29,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727014154] [2024-11-14 04:29:29,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:29,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:29,378 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:29,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:29:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:29,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:29,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 04:29:29,809 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727014154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:29,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456009026] [2024-11-14 04:29:29,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:29,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:29,812 INFO L87 Difference]: Start difference. First operand 946 states and 1480 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:30,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:30,109 INFO L93 Difference]: Finished difference Result 2810 states and 4522 transitions. [2024-11-14 04:29:30,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:30,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:30,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:30,123 INFO L225 Difference]: With dead ends: 2810 [2024-11-14 04:29:30,124 INFO L226 Difference]: Without dead ends: 1870 [2024-11-14 04:29:30,129 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:30,129 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 256 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:30,130 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1870 states. [2024-11-14 04:29:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1870 to 1861. [2024-11-14 04:29:30,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1585 states have (on average 1.4851735015772871) internal successors, (2354), 1593 states have internal predecessors, (2354), 215 states have call successors, (215), 61 states have call predecessors, (215), 60 states have return successors, (333), 207 states have call predecessors, (333), 213 states have call successors, (333) [2024-11-14 04:29:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2902 transitions. [2024-11-14 04:29:30,333 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2902 transitions. Word has length 138 [2024-11-14 04:29:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:30,334 INFO L471 AbstractCegarLoop]: Abstraction has 1861 states and 2902 transitions. [2024-11-14 04:29:30,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2902 transitions. [2024-11-14 04:29:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:30,342 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:30,343 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:30,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:29:30,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:29:30,545 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:30,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:30,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1041584582, now seen corresponding path program 1 times [2024-11-14 04:29:30,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:30,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864935064] [2024-11-14 04:29:30,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:30,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:30,801 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 04:29:30,801 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:30,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864935064] [2024-11-14 04:29:30,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864935064] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:30,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063319811] [2024-11-14 04:29:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:30,805 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:30,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:29:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:31,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:31,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 04:29:31,242 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:31,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063319811] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:31,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:31,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:31,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530636224] [2024-11-14 04:29:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:31,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:31,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:31,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:31,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:31,247 INFO L87 Difference]: Start difference. First operand 1861 states and 2902 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:31,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:31,686 INFO L93 Difference]: Finished difference Result 5540 states and 8880 transitions. [2024-11-14 04:29:31,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:31,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:31,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:31,711 INFO L225 Difference]: With dead ends: 5540 [2024-11-14 04:29:31,711 INFO L226 Difference]: Without dead ends: 3685 [2024-11-14 04:29:31,719 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:31,720 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 259 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:31,720 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2024-11-14 04:29:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3671. [2024-11-14 04:29:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3671 states, 3136 states have (on average 1.4808673469387754) internal successors, (4644), 3150 states have internal predecessors, (4644), 414 states have call successors, (414), 121 states have call predecessors, (414), 120 states have return successors, (644), 400 states have call predecessors, (644), 412 states have call successors, (644) [2024-11-14 04:29:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3671 states to 3671 states and 5702 transitions. [2024-11-14 04:29:32,014 INFO L78 Accepts]: Start accepts. Automaton has 3671 states and 5702 transitions. Word has length 138 [2024-11-14 04:29:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:32,015 INFO L471 AbstractCegarLoop]: Abstraction has 3671 states and 5702 transitions. [2024-11-14 04:29:32,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3671 states and 5702 transitions. [2024-11-14 04:29:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:32,029 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:32,029 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:32,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 04:29:32,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:32,230 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:32,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash -419836250, now seen corresponding path program 1 times [2024-11-14 04:29:32,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:32,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366678298] [2024-11-14 04:29:32,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:32,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:32,448 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 04:29:32,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:32,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366678298] [2024-11-14 04:29:32,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366678298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:32,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047934475] [2024-11-14 04:29:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:32,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:32,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:32,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:32,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:29:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:32,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:32,711 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:32,774 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-14 04:29:32,774 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:32,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047934475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:32,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:32,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940217043] [2024-11-14 04:29:32,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:32,775 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:32,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:32,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:32,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:32,776 INFO L87 Difference]: Start difference. First operand 3671 states and 5702 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:33,421 INFO L93 Difference]: Finished difference Result 10940 states and 17455 transitions. [2024-11-14 04:29:33,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:33,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:33,476 INFO L225 Difference]: With dead ends: 10940 [2024-11-14 04:29:33,476 INFO L226 Difference]: Without dead ends: 7275 [2024-11-14 04:29:33,498 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:33,499 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 277 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:33,499 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7275 states. [2024-11-14 04:29:33,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7275 to 7251. [2024-11-14 04:29:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7251 states, 6208 states have (on average 1.476159793814433) internal successors, (9164), 6234 states have internal predecessors, (9164), 802 states have call successors, (802), 241 states have call predecessors, (802), 240 states have return successors, (1248), 776 states have call predecessors, (1248), 800 states have call successors, (1248) [2024-11-14 04:29:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7251 states to 7251 states and 11214 transitions. [2024-11-14 04:29:34,052 INFO L78 Accepts]: Start accepts. Automaton has 7251 states and 11214 transitions. Word has length 138 [2024-11-14 04:29:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:34,052 INFO L471 AbstractCegarLoop]: Abstraction has 7251 states and 11214 transitions. [2024-11-14 04:29:34,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 7251 states and 11214 transitions. [2024-11-14 04:29:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:34,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:34,065 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:34,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 04:29:34,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:29:34,266 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:34,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash 458019718, now seen corresponding path program 1 times [2024-11-14 04:29:34,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:34,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293488449] [2024-11-14 04:29:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:34,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:34,509 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 04:29:34,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:34,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293488449] [2024-11-14 04:29:34,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293488449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:34,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119547880] [2024-11-14 04:29:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:34,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:34,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:34,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:34,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:29:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:34,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 925 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:34,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-14 04:29:34,816 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:34,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119547880] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:34,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:34,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:34,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574501662] [2024-11-14 04:29:34,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:34,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:34,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:34,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:34,819 INFO L87 Difference]: Start difference. First operand 7251 states and 11214 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:35,831 INFO L93 Difference]: Finished difference Result 21620 states and 34323 transitions. [2024-11-14 04:29:35,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:35,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:35,975 INFO L225 Difference]: With dead ends: 21620 [2024-11-14 04:29:35,975 INFO L226 Difference]: Without dead ends: 14375 [2024-11-14 04:29:36,025 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:36,026 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 280 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:36,027 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:36,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14375 states. [2024-11-14 04:29:37,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14375 to 14331. [2024-11-14 04:29:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14331 states, 12292 states have (on average 1.4712007809957697) internal successors, (18084), 12342 states have internal predecessors, (18084), 1558 states have call successors, (1558), 481 states have call predecessors, (1558), 480 states have return successors, (2420), 1508 states have call predecessors, (2420), 1556 states have call successors, (2420) [2024-11-14 04:29:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14331 states to 14331 states and 22062 transitions. [2024-11-14 04:29:37,101 INFO L78 Accepts]: Start accepts. Automaton has 14331 states and 22062 transitions. Word has length 138 [2024-11-14 04:29:37,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:37,102 INFO L471 AbstractCegarLoop]: Abstraction has 14331 states and 22062 transitions. [2024-11-14 04:29:37,102 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:37,102 INFO L276 IsEmpty]: Start isEmpty. Operand 14331 states and 22062 transitions. [2024-11-14 04:29:37,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:37,126 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:37,126 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:37,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:29:37,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:29:37,383 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:37,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:37,383 INFO L85 PathProgramCache]: Analyzing trace with hash 609297062, now seen corresponding path program 1 times [2024-11-14 04:29:37,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:37,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409829347] [2024-11-14 04:29:37,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:37,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:37,575 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 04:29:37,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409829347] [2024-11-14 04:29:37,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409829347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459586147] [2024-11-14 04:29:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:37,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:37,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:37,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:29:37,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:37,846 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:37,850 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:37,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-14 04:29:37,936 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:37,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459586147] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:37,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:37,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705988534] [2024-11-14 04:29:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:37,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:37,938 INFO L87 Difference]: Start difference. First operand 14331 states and 22062 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:39,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:39,600 INFO L93 Difference]: Finished difference Result 42740 states and 67495 transitions. [2024-11-14 04:29:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:39,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:39,801 INFO L225 Difference]: With dead ends: 42740 [2024-11-14 04:29:39,802 INFO L226 Difference]: Without dead ends: 28415 [2024-11-14 04:29:39,870 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:39,871 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 265 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:39,872 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28415 states. [2024-11-14 04:29:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28415 to 28331. [2024-11-14 04:29:41,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28331 states, 24340 states have (on average 1.4660640920295809) internal successors, (35684), 24438 states have internal predecessors, (35684), 3030 states have call successors, (3030), 961 states have call predecessors, (3030), 960 states have return successors, (4692), 2932 states have call predecessors, (4692), 3028 states have call successors, (4692) [2024-11-14 04:29:42,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28331 states to 28331 states and 43406 transitions. [2024-11-14 04:29:42,088 INFO L78 Accepts]: Start accepts. Automaton has 28331 states and 43406 transitions. Word has length 138 [2024-11-14 04:29:42,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:42,089 INFO L471 AbstractCegarLoop]: Abstraction has 28331 states and 43406 transitions. [2024-11-14 04:29:42,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:42,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28331 states and 43406 transitions. [2024-11-14 04:29:42,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:42,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:42,131 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:42,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-14 04:29:42,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:29:42,335 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:42,336 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:42,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1616672646, now seen corresponding path program 1 times [2024-11-14 04:29:42,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:42,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998838968] [2024-11-14 04:29:42,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:42,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:42,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:42,500 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 04:29:42,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998838968] [2024-11-14 04:29:42,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998838968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:29:42,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852006781] [2024-11-14 04:29:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:42,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:29:42,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:29:42,503 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:29:42,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:29:42,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:42,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-14 04:29:42,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:29:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-14 04:29:42,815 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-14 04:29:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852006781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:42,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-14 04:29:42,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-14 04:29:42,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126358151] [2024-11-14 04:29:42,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:42,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:29:42,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:42,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:29:42,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:42,818 INFO L87 Difference]: Start difference. First operand 28331 states and 43406 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:45,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:45,611 INFO L93 Difference]: Finished difference Result 84500 states and 132711 transitions. [2024-11-14 04:29:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:29:45,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 138 [2024-11-14 04:29:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:45,990 INFO L225 Difference]: With dead ends: 84500 [2024-11-14 04:29:45,990 INFO L226 Difference]: Without dead ends: 56175 [2024-11-14 04:29:46,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:46,155 INFO L432 NwaCegarLoop]: 255 mSDtfsCounter, 271 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:46,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 501 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:29:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56175 states. [2024-11-14 04:29:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56175 to 56011. [2024-11-14 04:29:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56011 states, 48196 states have (on average 1.4607851273964645) internal successors, (70404), 48390 states have internal predecessors, (70404), 5894 states have call successors, (5894), 1921 states have call predecessors, (5894), 1920 states have return successors, (9092), 5700 states have call predecessors, (9092), 5892 states have call successors, (9092) [2024-11-14 04:29:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56011 states to 56011 states and 85390 transitions. [2024-11-14 04:29:49,989 INFO L78 Accepts]: Start accepts. Automaton has 56011 states and 85390 transitions. Word has length 138 [2024-11-14 04:29:49,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:29:49,990 INFO L471 AbstractCegarLoop]: Abstraction has 56011 states and 85390 transitions. [2024-11-14 04:29:49,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-14 04:29:49,990 INFO L276 IsEmpty]: Start isEmpty. Operand 56011 states and 85390 transitions. [2024-11-14 04:29:50,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 04:29:50,069 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:29:50,070 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:29:50,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:29:50,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8142adfc-1d18-4c8c-80ed-e864bcb73604/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 04:29:50,270 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:29:50,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:29:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -49503130, now seen corresponding path program 1 times [2024-11-14 04:29:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:29:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243841193] [2024-11-14 04:29:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:29:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:29:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:29:50,768 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 04:29:50,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:29:50,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243841193] [2024-11-14 04:29:50,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243841193] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:29:50,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:29:50,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:29:50,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717763165] [2024-11-14 04:29:50,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:29:50,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:29:50,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:29:50,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:29:50,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:29:50,771 INFO L87 Difference]: Start difference. First operand 56011 states and 85390 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 04:29:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:29:56,931 INFO L93 Difference]: Finished difference Result 150675 states and 231956 transitions. [2024-11-14 04:29:56,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 04:29:56,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 138 [2024-11-14 04:29:56,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:29:57,434 INFO L225 Difference]: With dead ends: 150675 [2024-11-14 04:29:57,434 INFO L226 Difference]: Without dead ends: 94671 [2024-11-14 04:29:57,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-14 04:29:57,599 INFO L432 NwaCegarLoop]: 288 mSDtfsCounter, 814 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 821 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:29:57,599 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [821 Valid, 1030 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 04:29:57,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94671 states. [2024-11-14 04:30:04,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94671 to 88779. [2024-11-14 04:30:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88779 states, 76356 states have (on average 1.4551312274084551) internal successors, (111108), 76678 states have internal predecessors, (111108), 9350 states have call successors, (9350), 3073 states have call predecessors, (9350), 3072 states have return successors, (14852), 9028 states have call predecessors, (14852), 9348 states have call successors, (14852) [2024-11-14 04:30:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88779 states to 88779 states and 135310 transitions. [2024-11-14 04:30:04,697 INFO L78 Accepts]: Start accepts. Automaton has 88779 states and 135310 transitions. Word has length 138 [2024-11-14 04:30:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:30:04,699 INFO L471 AbstractCegarLoop]: Abstraction has 88779 states and 135310 transitions. [2024-11-14 04:30:04,699 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-11-14 04:30:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 88779 states and 135310 transitions. [2024-11-14 04:30:04,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-11-14 04:30:04,795 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:30:04,796 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:30:04,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-14 04:30:04,796 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:30:04,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:30:04,797 INFO L85 PathProgramCache]: Analyzing trace with hash -211667774, now seen corresponding path program 1 times [2024-11-14 04:30:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:30:04,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992452008] [2024-11-14 04:30:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:30:04,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:30:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:30:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-14 04:30:05,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:30:05,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992452008] [2024-11-14 04:30:05,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992452008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:30:05,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:30:05,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-14 04:30:05,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180301711] [2024-11-14 04:30:05,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:30:05,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 04:30:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:30:05,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 04:30:05,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-14 04:30:05,360 INFO L87 Difference]: Start difference. First operand 88779 states and 135310 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)